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numam-dpdk/lib/sched/rte_sched.c
Megha Ajmera d91c4b1bb5 sched: enable traffic class oversubscription unconditionally 
Removed RTE_SCHED_SUBPORT_TC_OV from rte_config.h.
Best effort traffic class oversubscription is always enabled.

Signed-off-by: Megha Ajmera <megha.ajmera@intel.com>
Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
2022-02-24 23:44:21 +01:00

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78 KiB
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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation
*/
#include <stdio.h>
#include <string.h>
#include <rte_common.h>
#include <rte_log.h>
#include <rte_malloc.h>
#include <rte_cycles.h>
#include <rte_prefetch.h>
#include <rte_branch_prediction.h>
#include <rte_mbuf.h>
#include <rte_bitmap.h>
#include <rte_reciprocal.h>
#include "rte_sched.h"
#include "rte_sched_common.h"
#include "rte_approx.h"
#ifdef __INTEL_COMPILER
#pragma warning(disable:2259) /* conversion may lose significant bits */
#endif
#ifndef RTE_SCHED_PORT_N_GRINDERS
#define RTE_SCHED_PORT_N_GRINDERS 8
#endif
#define RTE_SCHED_TB_RATE_CONFIG_ERR (1e-7)
#define RTE_SCHED_WRR_SHIFT 3
#define RTE_SCHED_MAX_QUEUES_PER_TC RTE_SCHED_BE_QUEUES_PER_PIPE
#define RTE_SCHED_GRINDER_PCACHE_SIZE (64 / RTE_SCHED_QUEUES_PER_PIPE)
#define RTE_SCHED_PIPE_INVALID UINT32_MAX
#define RTE_SCHED_BMP_POS_INVALID UINT32_MAX
/* Scaling for cycles_per_byte calculation
* Chosen so that minimum rate is 480 bit/sec
*/
#define RTE_SCHED_TIME_SHIFT 8
struct rte_sched_pipe_profile {
/* Token bucket (TB) */
uint64_t tb_period;
uint64_t tb_credits_per_period;
uint64_t tb_size;
/* Pipe traffic classes */
uint64_t tc_period;
uint64_t tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
uint8_t tc_ov_weight;
/* Pipe best-effort traffic class queues */
uint8_t wrr_cost[RTE_SCHED_BE_QUEUES_PER_PIPE];
};
struct rte_sched_pipe {
/* Token bucket (TB) */
uint64_t tb_time; /* time of last update */
uint64_t tb_credits;
/* Pipe profile and flags */
uint32_t profile;
/* Traffic classes (TCs) */
uint64_t tc_time; /* time of next update */
uint64_t tc_credits[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
/* Weighted Round Robin (WRR) */
uint8_t wrr_tokens[RTE_SCHED_BE_QUEUES_PER_PIPE];
/* TC oversubscription */
uint64_t tc_ov_credits;
uint8_t tc_ov_period_id;
} __rte_cache_aligned;
struct rte_sched_queue {
uint16_t qw;
uint16_t qr;
};
struct rte_sched_queue_extra {
struct rte_sched_queue_stats stats;
#ifdef RTE_SCHED_CMAN
RTE_STD_C11
union {
struct rte_red red;
struct rte_pie pie;
};
#endif
};
enum grinder_state {
e_GRINDER_PREFETCH_PIPE = 0,
e_GRINDER_PREFETCH_TC_QUEUE_ARRAYS,
e_GRINDER_PREFETCH_MBUF,
e_GRINDER_READ_MBUF
};
struct rte_sched_subport_profile {
/* Token bucket (TB) */
uint64_t tb_period;
uint64_t tb_credits_per_period;
uint64_t tb_size;
uint64_t tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
uint64_t tc_period;
};
struct rte_sched_grinder {
/* Pipe cache */
uint16_t pcache_qmask[RTE_SCHED_GRINDER_PCACHE_SIZE];
uint32_t pcache_qindex[RTE_SCHED_GRINDER_PCACHE_SIZE];
uint32_t pcache_w;
uint32_t pcache_r;
/* Current pipe */
enum grinder_state state;
uint32_t productive;
uint32_t pindex;
struct rte_sched_subport *subport;
struct rte_sched_subport_profile *subport_params;
struct rte_sched_pipe *pipe;
struct rte_sched_pipe_profile *pipe_params;
/* TC cache */
uint8_t tccache_qmask[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
uint32_t tccache_qindex[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
uint32_t tccache_w;
uint32_t tccache_r;
/* Current TC */
uint32_t tc_index;
struct rte_sched_queue *queue[RTE_SCHED_MAX_QUEUES_PER_TC];
struct rte_mbuf **qbase[RTE_SCHED_MAX_QUEUES_PER_TC];
uint32_t qindex[RTE_SCHED_MAX_QUEUES_PER_TC];
uint16_t qsize;
uint32_t qmask;
uint32_t qpos;
struct rte_mbuf *pkt;
/* WRR */
uint16_t wrr_tokens[RTE_SCHED_BE_QUEUES_PER_PIPE];
uint16_t wrr_mask[RTE_SCHED_BE_QUEUES_PER_PIPE];
uint8_t wrr_cost[RTE_SCHED_BE_QUEUES_PER_PIPE];
};
struct rte_sched_subport {
/* Token bucket (TB) */
uint64_t tb_time; /* time of last update */
uint64_t tb_credits;
/* Traffic classes (TCs) */
uint64_t tc_time; /* time of next update */
uint64_t tc_credits[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
/* TC oversubscription */
uint64_t tc_ov_wm;
uint64_t tc_ov_wm_min;
uint64_t tc_ov_wm_max;
uint8_t tc_ov_period_id;
uint8_t tc_ov;
uint32_t tc_ov_n;
double tc_ov_rate;
/* Statistics */
struct rte_sched_subport_stats stats __rte_cache_aligned;
/* subport profile */
uint32_t profile;
/* Subport pipes */
uint32_t n_pipes_per_subport_enabled;
uint32_t n_pipe_profiles;
uint32_t n_max_pipe_profiles;
/* Pipe best-effort TC rate */
uint64_t pipe_tc_be_rate_max;
/* Pipe queues size */
uint16_t qsize[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
#ifdef RTE_SCHED_CMAN
bool cman_enabled;
enum rte_sched_cman_mode cman;
RTE_STD_C11
union {
struct rte_red_config red_config[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE][RTE_COLORS];
struct rte_pie_config pie_config[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
};
#endif
/* Scheduling loop detection */
uint32_t pipe_loop;
uint32_t pipe_exhaustion;
/* Bitmap */
struct rte_bitmap *bmp;
uint32_t grinder_base_bmp_pos[RTE_SCHED_PORT_N_GRINDERS] __rte_aligned_16;
/* Grinders */
struct rte_sched_grinder grinder[RTE_SCHED_PORT_N_GRINDERS];
uint32_t busy_grinders;
/* Queue base calculation */
uint32_t qsize_add[RTE_SCHED_QUEUES_PER_PIPE];
uint32_t qsize_sum;
struct rte_sched_pipe *pipe;
struct rte_sched_queue *queue;
struct rte_sched_queue_extra *queue_extra;
struct rte_sched_pipe_profile *pipe_profiles;
uint8_t *bmp_array;
struct rte_mbuf **queue_array;
uint8_t memory[0] __rte_cache_aligned;
} __rte_cache_aligned;
struct rte_sched_port {
/* User parameters */
uint32_t n_subports_per_port;
uint32_t n_pipes_per_subport;
uint32_t n_pipes_per_subport_log2;
uint16_t pipe_queue[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
uint8_t pipe_tc[RTE_SCHED_QUEUES_PER_PIPE];
uint8_t tc_queue[RTE_SCHED_QUEUES_PER_PIPE];
uint32_t n_subport_profiles;
uint32_t n_max_subport_profiles;
uint64_t rate;
uint32_t mtu;
uint32_t frame_overhead;
int socket;
/* Timing */
uint64_t time_cpu_cycles; /* Current CPU time measured in CPU cycles */
uint64_t time_cpu_bytes; /* Current CPU time measured in bytes */
uint64_t time; /* Current NIC TX time measured in bytes */
struct rte_reciprocal inv_cycles_per_byte; /* CPU cycles per byte */
uint64_t cycles_per_byte;
/* Grinders */
struct rte_mbuf **pkts_out;
uint32_t n_pkts_out;
uint32_t subport_id;
/* Large data structures */
struct rte_sched_subport_profile *subport_profiles;
struct rte_sched_subport *subports[0] __rte_cache_aligned;
} __rte_cache_aligned;
enum rte_sched_subport_array {
e_RTE_SCHED_SUBPORT_ARRAY_PIPE = 0,
e_RTE_SCHED_SUBPORT_ARRAY_QUEUE,
e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_EXTRA,
e_RTE_SCHED_SUBPORT_ARRAY_PIPE_PROFILES,
e_RTE_SCHED_SUBPORT_ARRAY_BMP_ARRAY,
e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_ARRAY,
e_RTE_SCHED_SUBPORT_ARRAY_TOTAL,
};
static inline uint32_t
rte_sched_subport_pipe_queues(struct rte_sched_subport *subport)
{
return RTE_SCHED_QUEUES_PER_PIPE * subport->n_pipes_per_subport_enabled;
}
static inline struct rte_mbuf **
rte_sched_subport_pipe_qbase(struct rte_sched_subport *subport, uint32_t qindex)
{
uint32_t pindex = qindex >> 4;
uint32_t qpos = qindex & (RTE_SCHED_QUEUES_PER_PIPE - 1);
return (subport->queue_array + pindex *
subport->qsize_sum + subport->qsize_add[qpos]);
}
static inline uint16_t
rte_sched_subport_pipe_qsize(struct rte_sched_port *port,
struct rte_sched_subport *subport, uint32_t qindex)
{
uint32_t tc = port->pipe_tc[qindex & (RTE_SCHED_QUEUES_PER_PIPE - 1)];
return subport->qsize[tc];
}
static inline uint32_t
rte_sched_port_queues_per_port(struct rte_sched_port *port)
{
uint32_t n_queues = 0, i;
for (i = 0; i < port->n_subports_per_port; i++)
n_queues += rte_sched_subport_pipe_queues(port->subports[i]);
return n_queues;
}
static inline uint16_t
rte_sched_port_pipe_queue(struct rte_sched_port *port, uint32_t traffic_class)
{
uint16_t pipe_queue = port->pipe_queue[traffic_class];
return pipe_queue;
}
static inline uint8_t
rte_sched_port_pipe_tc(struct rte_sched_port *port, uint32_t qindex)
{
uint8_t pipe_tc = port->pipe_tc[qindex & (RTE_SCHED_QUEUES_PER_PIPE - 1)];
return pipe_tc;
}
static inline uint8_t
rte_sched_port_tc_queue(struct rte_sched_port *port, uint32_t qindex)
{
uint8_t tc_queue = port->tc_queue[qindex & (RTE_SCHED_QUEUES_PER_PIPE - 1)];
return tc_queue;
}
static int
pipe_profile_check(struct rte_sched_pipe_params *params,
uint64_t rate, uint16_t *qsize)
{
uint32_t i;
/* Pipe parameters */
if (params == NULL) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for parameter params\n", __func__);
return -EINVAL;
}
/* TB rate: non-zero, not greater than port rate */
if (params->tb_rate == 0 ||
params->tb_rate > rate) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for tb rate\n", __func__);
return -EINVAL;
}
/* TB size: non-zero */
if (params->tb_size == 0) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for tb size\n", __func__);
return -EINVAL;
}
/* TC rate: non-zero if qsize non-zero, less than pipe rate */
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
if ((qsize[i] == 0 && params->tc_rate[i] != 0) ||
(qsize[i] != 0 && (params->tc_rate[i] == 0 ||
params->tc_rate[i] > params->tb_rate))) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for qsize or tc_rate\n", __func__);
return -EINVAL;
}
}
if (params->tc_rate[RTE_SCHED_TRAFFIC_CLASS_BE] == 0 ||
qsize[RTE_SCHED_TRAFFIC_CLASS_BE] == 0) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for be traffic class rate\n", __func__);
return -EINVAL;
}
/* TC period: non-zero */
if (params->tc_period == 0) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for tc period\n", __func__);
return -EINVAL;
}
/* Best effort tc oversubscription weight: non-zero */
if (params->tc_ov_weight == 0) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for tc ov weight\n", __func__);
return -EINVAL;
}
/* Queue WRR weights: non-zero */
for (i = 0; i < RTE_SCHED_BE_QUEUES_PER_PIPE; i++) {
if (params->wrr_weights[i] == 0) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for wrr weight\n", __func__);
return -EINVAL;
}
}
return 0;
}
static int
subport_profile_check(struct rte_sched_subport_profile_params *params,
uint64_t rate)
{
uint32_t i;
/* Check user parameters */
if (params == NULL) {
RTE_LOG(ERR, SCHED, "%s: "
"Incorrect value for parameter params\n", __func__);
return -EINVAL;
}
if (params->tb_rate == 0 || params->tb_rate > rate) {
RTE_LOG(ERR, SCHED, "%s: "
"Incorrect value for tb rate\n", __func__);
return -EINVAL;
}
if (params->tb_size == 0) {
RTE_LOG(ERR, SCHED, "%s: "
"Incorrect value for tb size\n", __func__);
return -EINVAL;
}
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
uint64_t tc_rate = params->tc_rate[i];
if (tc_rate == 0 || (tc_rate > params->tb_rate)) {
RTE_LOG(ERR, SCHED, "%s: "
"Incorrect value for tc rate\n", __func__);
return -EINVAL;
}
}
if (params->tc_rate[RTE_SCHED_TRAFFIC_CLASS_BE] == 0) {
RTE_LOG(ERR, SCHED, "%s: "
"Incorrect tc rate(best effort)\n", __func__);
return -EINVAL;
}
if (params->tc_period == 0) {
RTE_LOG(ERR, SCHED, "%s: "
"Incorrect value for tc period\n", __func__);
return -EINVAL;
}
return 0;
}
static int
rte_sched_port_check_params(struct rte_sched_port_params *params)
{
uint32_t i;
if (params == NULL) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for parameter params\n", __func__);
return -EINVAL;
}
/* socket */
if (params->socket < 0) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for socket id\n", __func__);
return -EINVAL;
}
/* rate */
if (params->rate == 0) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for rate\n", __func__);
return -EINVAL;
}
/* mtu */
if (params->mtu == 0) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for mtu\n", __func__);
return -EINVAL;
}
/* n_subports_per_port: non-zero, limited to 16 bits, power of 2 */
if (params->n_subports_per_port == 0 ||
params->n_subports_per_port > 1u << 16 ||
!rte_is_power_of_2(params->n_subports_per_port)) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for number of subports\n", __func__);
return -EINVAL;
}
if (params->subport_profiles == NULL ||
params->n_subport_profiles == 0 ||
params->n_max_subport_profiles == 0 ||
params->n_subport_profiles > params->n_max_subport_profiles) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for subport profiles\n", __func__);
return -EINVAL;
}
for (i = 0; i < params->n_subport_profiles; i++) {
struct rte_sched_subport_profile_params *p =
params->subport_profiles + i;
int status;
status = subport_profile_check(p, params->rate);
if (status != 0) {
RTE_LOG(ERR, SCHED,
"%s: subport profile check failed(%d)\n",
__func__, status);
return -EINVAL;
}
}
/* n_pipes_per_subport: non-zero, power of 2 */
if (params->n_pipes_per_subport == 0 ||
!rte_is_power_of_2(params->n_pipes_per_subport)) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for maximum pipes number\n", __func__);
return -EINVAL;
}
return 0;
}
static uint32_t
rte_sched_subport_get_array_base(struct rte_sched_subport_params *params,
enum rte_sched_subport_array array)
{
uint32_t n_pipes_per_subport = params->n_pipes_per_subport_enabled;
uint32_t n_subport_pipe_queues =
RTE_SCHED_QUEUES_PER_PIPE * n_pipes_per_subport;
uint32_t size_pipe = n_pipes_per_subport * sizeof(struct rte_sched_pipe);
uint32_t size_queue =
n_subport_pipe_queues * sizeof(struct rte_sched_queue);
uint32_t size_queue_extra
= n_subport_pipe_queues * sizeof(struct rte_sched_queue_extra);
uint32_t size_pipe_profiles = params->n_max_pipe_profiles *
sizeof(struct rte_sched_pipe_profile);
uint32_t size_bmp_array =
rte_bitmap_get_memory_footprint(n_subport_pipe_queues);
uint32_t size_per_pipe_queue_array, size_queue_array;
uint32_t base, i;
size_per_pipe_queue_array = 0;
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
if (i < RTE_SCHED_TRAFFIC_CLASS_BE)
size_per_pipe_queue_array +=
params->qsize[i] * sizeof(struct rte_mbuf *);
else
size_per_pipe_queue_array += RTE_SCHED_MAX_QUEUES_PER_TC *
params->qsize[i] * sizeof(struct rte_mbuf *);
}
size_queue_array = n_pipes_per_subport * size_per_pipe_queue_array;
base = 0;
if (array == e_RTE_SCHED_SUBPORT_ARRAY_PIPE)
return base;
base += RTE_CACHE_LINE_ROUNDUP(size_pipe);
if (array == e_RTE_SCHED_SUBPORT_ARRAY_QUEUE)
return base;
base += RTE_CACHE_LINE_ROUNDUP(size_queue);
if (array == e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_EXTRA)
return base;
base += RTE_CACHE_LINE_ROUNDUP(size_queue_extra);
if (array == e_RTE_SCHED_SUBPORT_ARRAY_PIPE_PROFILES)
return base;
base += RTE_CACHE_LINE_ROUNDUP(size_pipe_profiles);
if (array == e_RTE_SCHED_SUBPORT_ARRAY_BMP_ARRAY)
return base;
base += RTE_CACHE_LINE_ROUNDUP(size_bmp_array);
if (array == e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_ARRAY)
return base;
base += RTE_CACHE_LINE_ROUNDUP(size_queue_array);
return base;
}
static void
rte_sched_subport_config_qsize(struct rte_sched_subport *subport)
{
uint32_t i;
subport->qsize_add[0] = 0;
/* Strict priority traffic class */
for (i = 1; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
subport->qsize_add[i] = subport->qsize_add[i-1] + subport->qsize[i-1];
/* Best-effort traffic class */
subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 1] =
subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE] +
subport->qsize[RTE_SCHED_TRAFFIC_CLASS_BE];
subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 2] =
subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 1] +
subport->qsize[RTE_SCHED_TRAFFIC_CLASS_BE];
subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 3] =
subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 2] +
subport->qsize[RTE_SCHED_TRAFFIC_CLASS_BE];
subport->qsize_sum = subport->qsize_add[RTE_SCHED_TRAFFIC_CLASS_BE + 3] +
subport->qsize[RTE_SCHED_TRAFFIC_CLASS_BE];
}
static void
rte_sched_port_log_pipe_profile(struct rte_sched_subport *subport, uint32_t i)
{
struct rte_sched_pipe_profile *p = subport->pipe_profiles + i;
RTE_LOG(DEBUG, SCHED, "Low level config for pipe profile %u:\n"
" Token bucket: period = %"PRIu64", credits per period = %"PRIu64", size = %"PRIu64"\n"
" Traffic classes: period = %"PRIu64",\n"
" credits per period = [%"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64
", %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64
", %"PRIu64", %"PRIu64", %"PRIu64"]\n"
" Best-effort traffic class oversubscription: weight = %hhu\n"
" WRR cost: [%hhu, %hhu, %hhu, %hhu]\n",
i,
/* Token bucket */
p->tb_period,
p->tb_credits_per_period,
p->tb_size,
/* Traffic classes */
p->tc_period,
p->tc_credits_per_period[0],
p->tc_credits_per_period[1],
p->tc_credits_per_period[2],
p->tc_credits_per_period[3],
p->tc_credits_per_period[4],
p->tc_credits_per_period[5],
p->tc_credits_per_period[6],
p->tc_credits_per_period[7],
p->tc_credits_per_period[8],
p->tc_credits_per_period[9],
p->tc_credits_per_period[10],
p->tc_credits_per_period[11],
p->tc_credits_per_period[12],
/* Best-effort traffic class oversubscription */
p->tc_ov_weight,
/* WRR */
p->wrr_cost[0], p->wrr_cost[1], p->wrr_cost[2], p->wrr_cost[3]);
}
static void
rte_sched_port_log_subport_profile(struct rte_sched_port *port, uint32_t i)
{
struct rte_sched_subport_profile *p = port->subport_profiles + i;
RTE_LOG(DEBUG, SCHED, "Low level config for subport profile %u:\n"
"Token bucket: period = %"PRIu64", credits per period = %"PRIu64","
"size = %"PRIu64"\n"
"Traffic classes: period = %"PRIu64",\n"
"credits per period = [%"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64
" %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64
" %"PRIu64", %"PRIu64", %"PRIu64"]\n",
i,
/* Token bucket */
p->tb_period,
p->tb_credits_per_period,
p->tb_size,
/* Traffic classes */
p->tc_period,
p->tc_credits_per_period[0],
p->tc_credits_per_period[1],
p->tc_credits_per_period[2],
p->tc_credits_per_period[3],
p->tc_credits_per_period[4],
p->tc_credits_per_period[5],
p->tc_credits_per_period[6],
p->tc_credits_per_period[7],
p->tc_credits_per_period[8],
p->tc_credits_per_period[9],
p->tc_credits_per_period[10],
p->tc_credits_per_period[11],
p->tc_credits_per_period[12]);
}
static inline uint64_t
rte_sched_time_ms_to_bytes(uint64_t time_ms, uint64_t rate)
{
uint64_t time = time_ms;
time = (time * rate) / 1000;
return time;
}
static void
rte_sched_pipe_profile_convert(struct rte_sched_subport *subport,
struct rte_sched_pipe_params *src,
struct rte_sched_pipe_profile *dst,
uint64_t rate)
{
uint32_t wrr_cost[RTE_SCHED_BE_QUEUES_PER_PIPE];
uint32_t lcd1, lcd2, lcd;
uint32_t i;
/* Token Bucket */
if (src->tb_rate == rate) {
dst->tb_credits_per_period = 1;
dst->tb_period = 1;
} else {
double tb_rate = (double) src->tb_rate
/ (double) rate;
double d = RTE_SCHED_TB_RATE_CONFIG_ERR;
rte_approx_64(tb_rate, d, &dst->tb_credits_per_period,
&dst->tb_period);
}
dst->tb_size = src->tb_size;
/* Traffic Classes */
dst->tc_period = rte_sched_time_ms_to_bytes(src->tc_period,
rate);
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
if (subport->qsize[i])
dst->tc_credits_per_period[i]
= rte_sched_time_ms_to_bytes(src->tc_period,
src->tc_rate[i]);
dst->tc_ov_weight = src->tc_ov_weight;
/* WRR queues */
wrr_cost[0] = src->wrr_weights[0];
wrr_cost[1] = src->wrr_weights[1];
wrr_cost[2] = src->wrr_weights[2];
wrr_cost[3] = src->wrr_weights[3];
lcd1 = rte_get_lcd(wrr_cost[0], wrr_cost[1]);
lcd2 = rte_get_lcd(wrr_cost[2], wrr_cost[3]);
lcd = rte_get_lcd(lcd1, lcd2);
wrr_cost[0] = lcd / wrr_cost[0];
wrr_cost[1] = lcd / wrr_cost[1];
wrr_cost[2] = lcd / wrr_cost[2];
wrr_cost[3] = lcd / wrr_cost[3];
dst->wrr_cost[0] = (uint8_t) wrr_cost[0];
dst->wrr_cost[1] = (uint8_t) wrr_cost[1];
dst->wrr_cost[2] = (uint8_t) wrr_cost[2];
dst->wrr_cost[3] = (uint8_t) wrr_cost[3];
}
static void
rte_sched_subport_profile_convert(struct rte_sched_subport_profile_params *src,
struct rte_sched_subport_profile *dst,
uint64_t rate)
{
uint32_t i;
/* Token Bucket */
if (src->tb_rate == rate) {
dst->tb_credits_per_period = 1;
dst->tb_period = 1;
} else {
double tb_rate = (double) src->tb_rate
/ (double) rate;
double d = RTE_SCHED_TB_RATE_CONFIG_ERR;
rte_approx_64(tb_rate, d, &dst->tb_credits_per_period,
&dst->tb_period);
}
dst->tb_size = src->tb_size;
/* Traffic Classes */
dst->tc_period = rte_sched_time_ms_to_bytes(src->tc_period, rate);
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
dst->tc_credits_per_period[i]
= rte_sched_time_ms_to_bytes(src->tc_period,
src->tc_rate[i]);
}
static void
rte_sched_subport_config_pipe_profile_table(struct rte_sched_subport *subport,
struct rte_sched_subport_params *params, uint64_t rate)
{
uint32_t i;
for (i = 0; i < subport->n_pipe_profiles; i++) {
struct rte_sched_pipe_params *src = params->pipe_profiles + i;
struct rte_sched_pipe_profile *dst = subport->pipe_profiles + i;
rte_sched_pipe_profile_convert(subport, src, dst, rate);
rte_sched_port_log_pipe_profile(subport, i);
}
subport->pipe_tc_be_rate_max = 0;
for (i = 0; i < subport->n_pipe_profiles; i++) {
struct rte_sched_pipe_params *src = params->pipe_profiles + i;
uint64_t pipe_tc_be_rate = src->tc_rate[RTE_SCHED_TRAFFIC_CLASS_BE];
if (subport->pipe_tc_be_rate_max < pipe_tc_be_rate)
subport->pipe_tc_be_rate_max = pipe_tc_be_rate;
}
}
static void
rte_sched_port_config_subport_profile_table(struct rte_sched_port *port,
struct rte_sched_port_params *params,
uint64_t rate)
{
uint32_t i;
for (i = 0; i < port->n_subport_profiles; i++) {
struct rte_sched_subport_profile_params *src
= params->subport_profiles + i;
struct rte_sched_subport_profile *dst
= port->subport_profiles + i;
rte_sched_subport_profile_convert(src, dst, rate);
rte_sched_port_log_subport_profile(port, i);
}
}
static int
rte_sched_subport_check_params(struct rte_sched_subport_params *params,
uint32_t n_max_pipes_per_subport,
uint64_t rate)
{
uint32_t i;
/* Check user parameters */
if (params == NULL) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for parameter params\n", __func__);
return -EINVAL;
}
/* qsize: if non-zero, power of 2,
* no bigger than 32K (due to 16-bit read/write pointers)
*/
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
uint16_t qsize = params->qsize[i];
if (qsize != 0 && !rte_is_power_of_2(qsize)) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for qsize\n", __func__);
return -EINVAL;
}
}
if (params->qsize[RTE_SCHED_TRAFFIC_CLASS_BE] == 0) {
RTE_LOG(ERR, SCHED, "%s: Incorrect qsize\n", __func__);
return -EINVAL;
}
/* n_pipes_per_subport: non-zero, power of 2 */
if (params->n_pipes_per_subport_enabled == 0 ||
params->n_pipes_per_subport_enabled > n_max_pipes_per_subport ||
!rte_is_power_of_2(params->n_pipes_per_subport_enabled)) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for pipes number\n", __func__);
return -EINVAL;
}
/* pipe_profiles and n_pipe_profiles */
if (params->pipe_profiles == NULL ||
params->n_pipe_profiles == 0 ||
params->n_max_pipe_profiles == 0 ||
params->n_pipe_profiles > params->n_max_pipe_profiles) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for pipe profiles\n", __func__);
return -EINVAL;
}
for (i = 0; i < params->n_pipe_profiles; i++) {
struct rte_sched_pipe_params *p = params->pipe_profiles + i;
int status;
status = pipe_profile_check(p, rate, &params->qsize[0]);
if (status != 0) {
RTE_LOG(ERR, SCHED,
"%s: Pipe profile check failed(%d)\n", __func__, status);
return -EINVAL;
}
}
return 0;
}
uint32_t
rte_sched_port_get_memory_footprint(struct rte_sched_port_params *port_params,
struct rte_sched_subport_params **subport_params)
{
uint32_t size0 = 0, size1 = 0, i;
int status;
status = rte_sched_port_check_params(port_params);
if (status != 0) {
RTE_LOG(ERR, SCHED,
"%s: Port scheduler port params check failed (%d)\n",
__func__, status);
return 0;
}
for (i = 0; i < port_params->n_subports_per_port; i++) {
struct rte_sched_subport_params *sp = subport_params[i];
status = rte_sched_subport_check_params(sp,
port_params->n_pipes_per_subport,
port_params->rate);
if (status != 0) {
RTE_LOG(ERR, SCHED,
"%s: Port scheduler subport params check failed (%d)\n",
__func__, status);
return 0;
}
}
size0 = sizeof(struct rte_sched_port);
for (i = 0; i < port_params->n_subports_per_port; i++) {
struct rte_sched_subport_params *sp = subport_params[i];
size1 += rte_sched_subport_get_array_base(sp,
e_RTE_SCHED_SUBPORT_ARRAY_TOTAL);
}
return size0 + size1;
}
struct rte_sched_port *
rte_sched_port_config(struct rte_sched_port_params *params)
{
struct rte_sched_port *port = NULL;
uint32_t size0, size1, size2;
uint32_t cycles_per_byte;
uint32_t i, j;
int status;
status = rte_sched_port_check_params(params);
if (status != 0) {
RTE_LOG(ERR, SCHED,
"%s: Port scheduler params check failed (%d)\n",
__func__, status);
return NULL;
}
size0 = sizeof(struct rte_sched_port);
size1 = params->n_subports_per_port * sizeof(struct rte_sched_subport *);
size2 = params->n_max_subport_profiles *
sizeof(struct rte_sched_subport_profile);
/* Allocate memory to store the data structures */
port = rte_zmalloc_socket("qos_params", size0 + size1,
RTE_CACHE_LINE_SIZE, params->socket);
if (port == NULL) {
RTE_LOG(ERR, SCHED, "%s: Memory allocation fails\n", __func__);
return NULL;
}
/* Allocate memory to store the subport profile */
port->subport_profiles = rte_zmalloc_socket("subport_profile", size2,
RTE_CACHE_LINE_SIZE, params->socket);
if (port->subport_profiles == NULL) {
RTE_LOG(ERR, SCHED, "%s: Memory allocation fails\n", __func__);
rte_free(port);
return NULL;
}
/* User parameters */
port->n_subports_per_port = params->n_subports_per_port;
port->n_subport_profiles = params->n_subport_profiles;
port->n_max_subport_profiles = params->n_max_subport_profiles;
port->n_pipes_per_subport = params->n_pipes_per_subport;
port->n_pipes_per_subport_log2 =
__builtin_ctz(params->n_pipes_per_subport);
port->socket = params->socket;
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
port->pipe_queue[i] = i;
for (i = 0, j = 0; i < RTE_SCHED_QUEUES_PER_PIPE; i++) {
port->pipe_tc[i] = j;
if (j < RTE_SCHED_TRAFFIC_CLASS_BE)
j++;
}
for (i = 0, j = 0; i < RTE_SCHED_QUEUES_PER_PIPE; i++) {
port->tc_queue[i] = j;
if (i >= RTE_SCHED_TRAFFIC_CLASS_BE)
j++;
}
port->rate = params->rate;
port->mtu = params->mtu + params->frame_overhead;
port->frame_overhead = params->frame_overhead;
/* Timing */
port->time_cpu_cycles = rte_get_tsc_cycles();
port->time_cpu_bytes = 0;
port->time = 0;
/* Subport profile table */
rte_sched_port_config_subport_profile_table(port, params, port->rate);
cycles_per_byte = (rte_get_tsc_hz() << RTE_SCHED_TIME_SHIFT)
/ params->rate;
port->inv_cycles_per_byte = rte_reciprocal_value(cycles_per_byte);
port->cycles_per_byte = cycles_per_byte;
/* Grinders */
port->pkts_out = NULL;
port->n_pkts_out = 0;
port->subport_id = 0;
return port;
}
static inline void
rte_sched_subport_free(struct rte_sched_port *port,
struct rte_sched_subport *subport)
{
uint32_t n_subport_pipe_queues;
uint32_t qindex;
if (subport == NULL)
return;
n_subport_pipe_queues = rte_sched_subport_pipe_queues(subport);
/* Free enqueued mbufs */
for (qindex = 0; qindex < n_subport_pipe_queues; qindex++) {
struct rte_mbuf **mbufs =
rte_sched_subport_pipe_qbase(subport, qindex);
uint16_t qsize = rte_sched_subport_pipe_qsize(port, subport, qindex);
if (qsize != 0) {
struct rte_sched_queue *queue = subport->queue + qindex;
uint16_t qr = queue->qr & (qsize - 1);
uint16_t qw = queue->qw & (qsize - 1);
for (; qr != qw; qr = (qr + 1) & (qsize - 1))
rte_pktmbuf_free(mbufs[qr]);
}
}
rte_free(subport);
}
void
rte_sched_port_free(struct rte_sched_port *port)
{
uint32_t i;
/* Check user parameters */
if (port == NULL)
return;
for (i = 0; i < port->n_subports_per_port; i++)
rte_sched_subport_free(port, port->subports[i]);
rte_free(port->subport_profiles);
rte_free(port);
}
static void
rte_sched_free_memory(struct rte_sched_port *port, uint32_t n_subports)
{
uint32_t i;
for (i = 0; i < n_subports; i++) {
struct rte_sched_subport *subport = port->subports[i];
rte_sched_subport_free(port, subport);
}
rte_free(port->subport_profiles);
rte_free(port);
}
#ifdef RTE_SCHED_CMAN
static int
rte_sched_red_config(struct rte_sched_port *port,
struct rte_sched_subport *s,
struct rte_sched_subport_params *params,
uint32_t n_subports)
{
uint32_t i;
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
uint32_t j;
for (j = 0; j < RTE_COLORS; j++) {
/* if min/max are both zero, then RED is disabled */
if ((params->cman_params->red_params[i][j].min_th |
params->cman_params->red_params[i][j].max_th) == 0) {
continue;
}
if (rte_red_config_init(&s->red_config[i][j],
params->cman_params->red_params[i][j].wq_log2,
params->cman_params->red_params[i][j].min_th,
params->cman_params->red_params[i][j].max_th,
params->cman_params->red_params[i][j].maxp_inv) != 0) {
rte_sched_free_memory(port, n_subports);
RTE_LOG(NOTICE, SCHED,
"%s: RED configuration init fails\n", __func__);
return -EINVAL;
}
}
}
s->cman = RTE_SCHED_CMAN_RED;
return 0;
}
static int
rte_sched_pie_config(struct rte_sched_port *port,
struct rte_sched_subport *s,
struct rte_sched_subport_params *params,
uint32_t n_subports)
{
uint32_t i;
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
if (params->cman_params->pie_params[i].tailq_th > params->qsize[i]) {
RTE_LOG(NOTICE, SCHED,
"%s: PIE tailq threshold incorrect\n", __func__);
return -EINVAL;
}
if (rte_pie_config_init(&s->pie_config[i],
params->cman_params->pie_params[i].qdelay_ref,
params->cman_params->pie_params[i].dp_update_interval,
params->cman_params->pie_params[i].max_burst,
params->cman_params->pie_params[i].tailq_th) != 0) {
rte_sched_free_memory(port, n_subports);
RTE_LOG(NOTICE, SCHED,
"%s: PIE configuration init fails\n", __func__);
return -EINVAL;
}
}
s->cman = RTE_SCHED_CMAN_PIE;
return 0;
}
static int
rte_sched_cman_config(struct rte_sched_port *port,
struct rte_sched_subport *s,
struct rte_sched_subport_params *params,
uint32_t n_subports)
{
if (params->cman_params->cman_mode == RTE_SCHED_CMAN_RED)
return rte_sched_red_config(port, s, params, n_subports);
else if (params->cman_params->cman_mode == RTE_SCHED_CMAN_PIE)
return rte_sched_pie_config(port, s, params, n_subports);
return -EINVAL;
}
#endif
int
rte_sched_subport_config(struct rte_sched_port *port,
uint32_t subport_id,
struct rte_sched_subport_params *params,
uint32_t subport_profile_id)
{
struct rte_sched_subport *s = NULL;
uint32_t n_subports = subport_id;
struct rte_sched_subport_profile *profile;
uint32_t n_subport_pipe_queues, i;
uint32_t size0, size1, bmp_mem_size;
int status;
int ret;
/* Check user parameters */
if (port == NULL) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for parameter port\n", __func__);
return 0;
}
if (subport_id >= port->n_subports_per_port) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for subport id\n", __func__);
ret = -EINVAL;
goto out;
}
if (subport_profile_id >= port->n_max_subport_profiles) {
RTE_LOG(ERR, SCHED, "%s: "
"Number of subport profile exceeds the max limit\n",
__func__);
ret = -EINVAL;
goto out;
}
/** Memory is allocated only on first invocation of the api for a
* given subport. Subsequent invocation on same subport will just
* update subport bandwidth parameter.
**/
if (port->subports[subport_id] == NULL) {
status = rte_sched_subport_check_params(params,
port->n_pipes_per_subport,
port->rate);
if (status != 0) {
RTE_LOG(NOTICE, SCHED,
"%s: Port scheduler params check failed (%d)\n",
__func__, status);
ret = -EINVAL;
goto out;
}
/* Determine the amount of memory to allocate */
size0 = sizeof(struct rte_sched_subport);
size1 = rte_sched_subport_get_array_base(params,
e_RTE_SCHED_SUBPORT_ARRAY_TOTAL);
/* Allocate memory to store the data structures */
s = rte_zmalloc_socket("subport_params", size0 + size1,
RTE_CACHE_LINE_SIZE, port->socket);
if (s == NULL) {
RTE_LOG(ERR, SCHED,
"%s: Memory allocation fails\n", __func__);
ret = -ENOMEM;
goto out;
}
n_subports++;
subport_profile_id = 0;
/* Port */
port->subports[subport_id] = s;
s->tb_time = port->time;
/* compile time checks */
RTE_BUILD_BUG_ON(RTE_SCHED_PORT_N_GRINDERS == 0);
RTE_BUILD_BUG_ON(RTE_SCHED_PORT_N_GRINDERS &
(RTE_SCHED_PORT_N_GRINDERS - 1));
/* User parameters */
s->n_pipes_per_subport_enabled =
params->n_pipes_per_subport_enabled;
memcpy(s->qsize, params->qsize, sizeof(params->qsize));
s->n_pipe_profiles = params->n_pipe_profiles;
s->n_max_pipe_profiles = params->n_max_pipe_profiles;
#ifdef RTE_SCHED_CMAN
if (params->cman_params != NULL) {
s->cman_enabled = true;
status = rte_sched_cman_config(port, s, params, n_subports);
if (status) {
RTE_LOG(NOTICE, SCHED,
"%s: CMAN configuration fails\n", __func__);
return status;
}
} else {
s->cman_enabled = false;
}
#endif
/* Scheduling loop detection */
s->pipe_loop = RTE_SCHED_PIPE_INVALID;
s->pipe_exhaustion = 0;
/* Grinders */
s->busy_grinders = 0;
/* Queue base calculation */
rte_sched_subport_config_qsize(s);
/* Large data structures */
s->pipe = (struct rte_sched_pipe *)
(s->memory + rte_sched_subport_get_array_base(params,
e_RTE_SCHED_SUBPORT_ARRAY_PIPE));
s->queue = (struct rte_sched_queue *)
(s->memory + rte_sched_subport_get_array_base(params,
e_RTE_SCHED_SUBPORT_ARRAY_QUEUE));
s->queue_extra = (struct rte_sched_queue_extra *)
(s->memory + rte_sched_subport_get_array_base(params,
e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_EXTRA));
s->pipe_profiles = (struct rte_sched_pipe_profile *)
(s->memory + rte_sched_subport_get_array_base(params,
e_RTE_SCHED_SUBPORT_ARRAY_PIPE_PROFILES));
s->bmp_array = s->memory + rte_sched_subport_get_array_base(
params, e_RTE_SCHED_SUBPORT_ARRAY_BMP_ARRAY);
s->queue_array = (struct rte_mbuf **)
(s->memory + rte_sched_subport_get_array_base(params,
e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_ARRAY));
/* Pipe profile table */
rte_sched_subport_config_pipe_profile_table(s, params,
port->rate);
/* Bitmap */
n_subport_pipe_queues = rte_sched_subport_pipe_queues(s);
bmp_mem_size = rte_bitmap_get_memory_footprint(
n_subport_pipe_queues);
s->bmp = rte_bitmap_init(n_subport_pipe_queues, s->bmp_array,
bmp_mem_size);
if (s->bmp == NULL) {
RTE_LOG(ERR, SCHED,
"%s: Subport bitmap init error\n", __func__);
ret = -EINVAL;
goto out;
}
for (i = 0; i < RTE_SCHED_PORT_N_GRINDERS; i++)
s->grinder_base_bmp_pos[i] = RTE_SCHED_PIPE_INVALID;
/* TC oversubscription */
s->tc_ov_wm_min = port->mtu;
s->tc_ov_period_id = 0;
s->tc_ov = 0;
s->tc_ov_n = 0;
s->tc_ov_rate = 0;
}
{
/* update subport parameters from subport profile table*/
profile = port->subport_profiles + subport_profile_id;
s = port->subports[subport_id];
s->tb_credits = profile->tb_size / 2;
s->tc_time = port->time + profile->tc_period;
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
if (s->qsize[i])
s->tc_credits[i] =
profile->tc_credits_per_period[i];
else
profile->tc_credits_per_period[i] = 0;
s->tc_ov_wm_max = rte_sched_time_ms_to_bytes(profile->tc_period,
s->pipe_tc_be_rate_max);
s->tc_ov_wm = s->tc_ov_wm_max;
s->profile = subport_profile_id;
}
rte_sched_port_log_subport_profile(port, subport_profile_id);
return 0;
out:
rte_sched_free_memory(port, n_subports);
return ret;
}
int
rte_sched_pipe_config(struct rte_sched_port *port,
uint32_t subport_id,
uint32_t pipe_id,
int32_t pipe_profile)
{
struct rte_sched_subport *s;
struct rte_sched_subport_profile *sp;
struct rte_sched_pipe *p;
struct rte_sched_pipe_profile *params;
uint32_t n_subports = subport_id + 1;
uint32_t deactivate, profile, i;
int ret;
/* Check user parameters */
profile = (uint32_t) pipe_profile;
deactivate = (pipe_profile < 0);
if (port == NULL) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for parameter port\n", __func__);
return -EINVAL;
}
if (subport_id >= port->n_subports_per_port) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for parameter subport id\n", __func__);
ret = -EINVAL;
goto out;
}
s = port->subports[subport_id];
if (pipe_id >= s->n_pipes_per_subport_enabled) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for parameter pipe id\n", __func__);
ret = -EINVAL;
goto out;
}
if (!deactivate && profile >= s->n_pipe_profiles) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for parameter pipe profile\n", __func__);
ret = -EINVAL;
goto out;
}
sp = port->subport_profiles + s->profile;
/* Handle the case when pipe already has a valid configuration */
p = s->pipe + pipe_id;
if (p->tb_time) {
params = s->pipe_profiles + p->profile;
double subport_tc_be_rate =
(double)sp->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE]
/ (double) sp->tc_period;
double pipe_tc_be_rate =
(double) params->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE]
/ (double) params->tc_period;
uint32_t tc_be_ov = s->tc_ov;
/* Unplug pipe from its subport */
s->tc_ov_n -= params->tc_ov_weight;
s->tc_ov_rate -= pipe_tc_be_rate;
s->tc_ov = s->tc_ov_rate > subport_tc_be_rate;
if (s->tc_ov != tc_be_ov) {
RTE_LOG(DEBUG, SCHED,
"Subport %u Best-effort TC oversubscription is OFF (%.4lf >= %.4lf)\n",
subport_id, subport_tc_be_rate, s->tc_ov_rate);
}
/* Reset the pipe */
memset(p, 0, sizeof(struct rte_sched_pipe));
}
if (deactivate)
return 0;
/* Apply the new pipe configuration */
p->profile = profile;
params = s->pipe_profiles + p->profile;
/* Token Bucket (TB) */
p->tb_time = port->time;
p->tb_credits = params->tb_size / 2;
/* Traffic Classes (TCs) */
p->tc_time = port->time + params->tc_period;
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
if (s->qsize[i])
p->tc_credits[i] = params->tc_credits_per_period[i];
{
/* Subport best effort tc oversubscription */
double subport_tc_be_rate =
(double)sp->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE]
/ (double) sp->tc_period;
double pipe_tc_be_rate =
(double) params->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE]
/ (double) params->tc_period;
uint32_t tc_be_ov = s->tc_ov;
s->tc_ov_n += params->tc_ov_weight;
s->tc_ov_rate += pipe_tc_be_rate;
s->tc_ov = s->tc_ov_rate > subport_tc_be_rate;
if (s->tc_ov != tc_be_ov) {
RTE_LOG(DEBUG, SCHED,
"Subport %u Best effort TC oversubscription is ON (%.4lf < %.4lf)\n",
subport_id, subport_tc_be_rate, s->tc_ov_rate);
}
p->tc_ov_period_id = s->tc_ov_period_id;
p->tc_ov_credits = s->tc_ov_wm;
}
return 0;
out:
rte_sched_free_memory(port, n_subports);
return ret;
}
int
rte_sched_subport_pipe_profile_add(struct rte_sched_port *port,
uint32_t subport_id,
struct rte_sched_pipe_params *params,
uint32_t *pipe_profile_id)
{
struct rte_sched_subport *s;
struct rte_sched_pipe_profile *pp;
uint32_t i;
int status;
/* Port */
if (port == NULL) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for parameter port\n", __func__);
return -EINVAL;
}
/* Subport id not exceeds the max limit */
if (subport_id > port->n_subports_per_port) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for subport id\n", __func__);
return -EINVAL;
}
s = port->subports[subport_id];
/* Pipe profiles exceeds the max limit */
if (s->n_pipe_profiles >= s->n_max_pipe_profiles) {
RTE_LOG(ERR, SCHED,
"%s: Number of pipe profiles exceeds the max limit\n", __func__);
return -EINVAL;
}
/* Pipe params */
status = pipe_profile_check(params, port->rate, &s->qsize[0]);
if (status != 0) {
RTE_LOG(ERR, SCHED,
"%s: Pipe profile check failed(%d)\n", __func__, status);
return -EINVAL;
}
pp = &s->pipe_profiles[s->n_pipe_profiles];
rte_sched_pipe_profile_convert(s, params, pp, port->rate);
/* Pipe profile should not exists */
for (i = 0; i < s->n_pipe_profiles; i++)
if (memcmp(s->pipe_profiles + i, pp, sizeof(*pp)) == 0) {
RTE_LOG(ERR, SCHED,
"%s: Pipe profile exists\n", __func__);
return -EINVAL;
}
/* Pipe profile commit */
*pipe_profile_id = s->n_pipe_profiles;
s->n_pipe_profiles++;
if (s->pipe_tc_be_rate_max < params->tc_rate[RTE_SCHED_TRAFFIC_CLASS_BE])
s->pipe_tc_be_rate_max = params->tc_rate[RTE_SCHED_TRAFFIC_CLASS_BE];
rte_sched_port_log_pipe_profile(s, *pipe_profile_id);
return 0;
}
int
rte_sched_port_subport_profile_add(struct rte_sched_port *port,
struct rte_sched_subport_profile_params *params,
uint32_t *subport_profile_id)
{
int status;
uint32_t i;
struct rte_sched_subport_profile *dst;
/* Port */
if (port == NULL) {
RTE_LOG(ERR, SCHED, "%s: "
"Incorrect value for parameter port\n", __func__);
return -EINVAL;
}
if (params == NULL) {
RTE_LOG(ERR, SCHED, "%s: "
"Incorrect value for parameter profile\n", __func__);
return -EINVAL;
}
if (subport_profile_id == NULL) {
RTE_LOG(ERR, SCHED, "%s: "
"Incorrect value for parameter subport_profile_id\n",
__func__);
return -EINVAL;
}
dst = port->subport_profiles + port->n_subport_profiles;
/* Subport profiles exceeds the max limit */
if (port->n_subport_profiles >= port->n_max_subport_profiles) {
RTE_LOG(ERR, SCHED, "%s: "
"Number of subport profiles exceeds the max limit\n",
__func__);
return -EINVAL;
}
status = subport_profile_check(params, port->rate);
if (status != 0) {
RTE_LOG(ERR, SCHED,
"%s: subport profile check failed(%d)\n", __func__, status);
return -EINVAL;
}
rte_sched_subport_profile_convert(params, dst, port->rate);
/* Subport profile should not exists */
for (i = 0; i < port->n_subport_profiles; i++)
if (memcmp(port->subport_profiles + i,
dst, sizeof(*dst)) == 0) {
RTE_LOG(ERR, SCHED,
"%s: subport profile exists\n", __func__);
return -EINVAL;
}
/* Subport profile commit */
*subport_profile_id = port->n_subport_profiles;
port->n_subport_profiles++;
rte_sched_port_log_subport_profile(port, *subport_profile_id);
return 0;
}
static inline uint32_t
rte_sched_port_qindex(struct rte_sched_port *port,
uint32_t subport,
uint32_t pipe,
uint32_t traffic_class,
uint32_t queue)
{
return ((subport & (port->n_subports_per_port - 1)) <<
(port->n_pipes_per_subport_log2 + 4)) |
((pipe &
(port->subports[subport]->n_pipes_per_subport_enabled - 1)) << 4) |
((rte_sched_port_pipe_queue(port, traffic_class) + queue) &
(RTE_SCHED_QUEUES_PER_PIPE - 1));
}
void
rte_sched_port_pkt_write(struct rte_sched_port *port,
struct rte_mbuf *pkt,
uint32_t subport, uint32_t pipe,
uint32_t traffic_class,
uint32_t queue, enum rte_color color)
{
uint32_t queue_id =
rte_sched_port_qindex(port, subport, pipe, traffic_class, queue);
rte_mbuf_sched_set(pkt, queue_id, traffic_class, (uint8_t)color);
}
void
rte_sched_port_pkt_read_tree_path(struct rte_sched_port *port,
const struct rte_mbuf *pkt,
uint32_t *subport, uint32_t *pipe,
uint32_t *traffic_class, uint32_t *queue)
{
uint32_t queue_id = rte_mbuf_sched_queue_get(pkt);
*subport = queue_id >> (port->n_pipes_per_subport_log2 + 4);
*pipe = (queue_id >> 4) &
(port->subports[*subport]->n_pipes_per_subport_enabled - 1);
*traffic_class = rte_sched_port_pipe_tc(port, queue_id);
*queue = rte_sched_port_tc_queue(port, queue_id);
}
enum rte_color
rte_sched_port_pkt_read_color(const struct rte_mbuf *pkt)
{
return (enum rte_color)rte_mbuf_sched_color_get(pkt);
}
int
rte_sched_subport_read_stats(struct rte_sched_port *port,
uint32_t subport_id,
struct rte_sched_subport_stats *stats,
uint32_t *tc_ov)
{
struct rte_sched_subport *s;
/* Check user parameters */
if (port == NULL) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for parameter port\n", __func__);
return -EINVAL;
}
if (subport_id >= port->n_subports_per_port) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for subport id\n", __func__);
return -EINVAL;
}
if (stats == NULL) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for parameter stats\n", __func__);
return -EINVAL;
}
if (tc_ov == NULL) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for tc_ov\n", __func__);
return -EINVAL;
}
s = port->subports[subport_id];
/* Copy subport stats and clear */
memcpy(stats, &s->stats, sizeof(struct rte_sched_subport_stats));
memset(&s->stats, 0, sizeof(struct rte_sched_subport_stats));
/* Subport TC oversubscription status */
*tc_ov = s->tc_ov;
return 0;
}
int
rte_sched_queue_read_stats(struct rte_sched_port *port,
uint32_t queue_id,
struct rte_sched_queue_stats *stats,
uint16_t *qlen)
{
struct rte_sched_subport *s;
struct rte_sched_queue *q;
struct rte_sched_queue_extra *qe;
uint32_t subport_id, subport_qmask, subport_qindex;
/* Check user parameters */
if (port == NULL) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for parameter port\n", __func__);
return -EINVAL;
}
if (queue_id >= rte_sched_port_queues_per_port(port)) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for queue id\n", __func__);
return -EINVAL;
}
if (stats == NULL) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for parameter stats\n", __func__);
return -EINVAL;
}
if (qlen == NULL) {
RTE_LOG(ERR, SCHED,
"%s: Incorrect value for parameter qlen\n", __func__);
return -EINVAL;
}
subport_qmask = port->n_pipes_per_subport_log2 + 4;
subport_id = (queue_id >> subport_qmask) & (port->n_subports_per_port - 1);
s = port->subports[subport_id];
subport_qindex = ((1 << subport_qmask) - 1) & queue_id;
q = s->queue + subport_qindex;
qe = s->queue_extra + subport_qindex;
/* Copy queue stats and clear */
memcpy(stats, &qe->stats, sizeof(struct rte_sched_queue_stats));
memset(&qe->stats, 0, sizeof(struct rte_sched_queue_stats));
/* Queue length */
*qlen = q->qw - q->qr;
return 0;
}
#ifdef RTE_SCHED_DEBUG
static inline int
rte_sched_port_queue_is_empty(struct rte_sched_subport *subport,
uint32_t qindex)
{
struct rte_sched_queue *queue = subport->queue + qindex;
return queue->qr == queue->qw;
}
#endif /* RTE_SCHED_DEBUG */
static inline void
rte_sched_port_update_subport_stats(struct rte_sched_port *port,
struct rte_sched_subport *subport,
uint32_t qindex,
struct rte_mbuf *pkt)
{
uint32_t tc_index = rte_sched_port_pipe_tc(port, qindex);
uint32_t pkt_len = pkt->pkt_len;
subport->stats.n_pkts_tc[tc_index] += 1;
subport->stats.n_bytes_tc[tc_index] += pkt_len;
}
static inline void
rte_sched_port_update_subport_stats_on_drop(struct rte_sched_port *port,
struct rte_sched_subport *subport,
uint32_t qindex,
struct rte_mbuf *pkt,
__rte_unused uint32_t n_pkts_cman_dropped)
{
uint32_t tc_index = rte_sched_port_pipe_tc(port, qindex);
uint32_t pkt_len = pkt->pkt_len;
subport->stats.n_pkts_tc_dropped[tc_index] += 1;
subport->stats.n_bytes_tc_dropped[tc_index] += pkt_len;
subport->stats.n_pkts_cman_dropped[tc_index] += n_pkts_cman_dropped;
}
static inline void
rte_sched_port_update_queue_stats(struct rte_sched_subport *subport,
uint32_t qindex,
struct rte_mbuf *pkt)
{
struct rte_sched_queue_extra *qe = subport->queue_extra + qindex;
uint32_t pkt_len = pkt->pkt_len;
qe->stats.n_pkts += 1;
qe->stats.n_bytes += pkt_len;
}
static inline void
rte_sched_port_update_queue_stats_on_drop(struct rte_sched_subport *subport,
uint32_t qindex,
struct rte_mbuf *pkt,
__rte_unused uint32_t n_pkts_cman_dropped)
{
struct rte_sched_queue_extra *qe = subport->queue_extra + qindex;
uint32_t pkt_len = pkt->pkt_len;
qe->stats.n_pkts_dropped += 1;
qe->stats.n_bytes_dropped += pkt_len;
#ifdef RTE_SCHED_CMAN
if (subport->cman_enabled)
qe->stats.n_pkts_cman_dropped += n_pkts_cman_dropped;
#endif
}
#ifdef RTE_SCHED_CMAN
static inline int
rte_sched_port_cman_drop(struct rte_sched_port *port,
struct rte_sched_subport *subport,
struct rte_mbuf *pkt,
uint32_t qindex,
uint16_t qlen)
{
if (!subport->cman_enabled)
return 0;
struct rte_sched_queue_extra *qe;
uint32_t tc_index;
tc_index = rte_sched_port_pipe_tc(port, qindex);
qe = subport->queue_extra + qindex;
/* RED */
if (subport->cman == RTE_SCHED_CMAN_RED) {
struct rte_red_config *red_cfg;
struct rte_red *red;
enum rte_color color;
color = rte_sched_port_pkt_read_color(pkt);
red_cfg = &subport->red_config[tc_index][color];
if ((red_cfg->min_th | red_cfg->max_th) == 0)
return 0;
red = &qe->red;
return rte_red_enqueue(red_cfg, red, qlen, port->time);
}
/* PIE */
struct rte_pie_config *pie_cfg = &subport->pie_config[tc_index];
struct rte_pie *pie = &qe->pie;
return rte_pie_enqueue(pie_cfg, pie, qlen, pkt->pkt_len, port->time_cpu_cycles);
}
static inline void
rte_sched_port_red_set_queue_empty_timestamp(struct rte_sched_port *port,
struct rte_sched_subport *subport, uint32_t qindex)
{
if (subport->cman_enabled) {
struct rte_sched_queue_extra *qe = subport->queue_extra + qindex;
if (subport->cman == RTE_SCHED_CMAN_RED) {
struct rte_red *red = &qe->red;
rte_red_mark_queue_empty(red, port->time);
}
}
}
static inline void
rte_sched_port_pie_dequeue(struct rte_sched_subport *subport,
uint32_t qindex, uint32_t pkt_len, uint64_t time) {
if (subport->cman_enabled && subport->cman == RTE_SCHED_CMAN_PIE) {
struct rte_sched_queue_extra *qe = subport->queue_extra + qindex;
struct rte_pie *pie = &qe->pie;
/* Update queue length */
pie->qlen -= 1;
pie->qlen_bytes -= pkt_len;
rte_pie_dequeue(pie, pkt_len, time);
}
}
#else
static inline int rte_sched_port_cman_drop(struct rte_sched_port *port __rte_unused,
struct rte_sched_subport *subport __rte_unused,
struct rte_mbuf *pkt __rte_unused,
uint32_t qindex __rte_unused,
uint16_t qlen __rte_unused)
{
return 0;
}
#define rte_sched_port_red_set_queue_empty_timestamp(port, subport, qindex)
static inline void
rte_sched_port_pie_dequeue(struct rte_sched_subport *subport __rte_unused,
uint32_t qindex __rte_unused,
uint32_t pkt_len __rte_unused,
uint64_t time __rte_unused) {
/* do-nothing when RTE_SCHED_CMAN not defined */
}
#endif /* RTE_SCHED_CMAN */
#ifdef RTE_SCHED_DEBUG
static inline void
debug_check_queue_slab(struct rte_sched_subport *subport, uint32_t bmp_pos,
uint64_t bmp_slab)
{
uint64_t mask;
uint32_t i, panic;
if (bmp_slab == 0)
rte_panic("Empty slab at position %u\n", bmp_pos);
panic = 0;
for (i = 0, mask = 1; i < 64; i++, mask <<= 1) {
if (mask & bmp_slab) {
if (rte_sched_port_queue_is_empty(subport, bmp_pos + i)) {
printf("Queue %u (slab offset %u) is empty\n", bmp_pos + i, i);
panic = 1;
}
}
}
if (panic)
rte_panic("Empty queues in slab 0x%" PRIx64 "starting at position %u\n",
bmp_slab, bmp_pos);
}
#endif /* RTE_SCHED_DEBUG */
static inline struct rte_sched_subport *
rte_sched_port_subport(struct rte_sched_port *port,
struct rte_mbuf *pkt)
{
uint32_t queue_id = rte_mbuf_sched_queue_get(pkt);
uint32_t subport_id = queue_id >> (port->n_pipes_per_subport_log2 + 4);
return port->subports[subport_id];
}
static inline uint32_t
rte_sched_port_enqueue_qptrs_prefetch0(struct rte_sched_subport *subport,
struct rte_mbuf *pkt, uint32_t subport_qmask)
{
struct rte_sched_queue *q;
struct rte_sched_queue_extra *qe;
uint32_t qindex = rte_mbuf_sched_queue_get(pkt);
uint32_t subport_queue_id = subport_qmask & qindex;
q = subport->queue + subport_queue_id;
rte_prefetch0(q);
qe = subport->queue_extra + subport_queue_id;
rte_prefetch0(qe);
return subport_queue_id;
}
static inline void
rte_sched_port_enqueue_qwa_prefetch0(struct rte_sched_port *port,
struct rte_sched_subport *subport,
uint32_t qindex,
struct rte_mbuf **qbase)
{
struct rte_sched_queue *q;
struct rte_mbuf **q_qw;
uint16_t qsize;
q = subport->queue + qindex;
qsize = rte_sched_subport_pipe_qsize(port, subport, qindex);
q_qw = qbase + (q->qw & (qsize - 1));
rte_prefetch0(q_qw);
rte_bitmap_prefetch0(subport->bmp, qindex);
}
static inline int
rte_sched_port_enqueue_qwa(struct rte_sched_port *port,
struct rte_sched_subport *subport,
uint32_t qindex,
struct rte_mbuf **qbase,
struct rte_mbuf *pkt)
{
struct rte_sched_queue *q;
uint16_t qsize;
uint16_t qlen;
q = subport->queue + qindex;
qsize = rte_sched_subport_pipe_qsize(port, subport, qindex);
qlen = q->qw - q->qr;
/* Drop the packet (and update drop stats) when queue is full */
if (unlikely(rte_sched_port_cman_drop(port, subport, pkt, qindex, qlen) ||
(qlen >= qsize))) {
rte_pktmbuf_free(pkt);
rte_sched_port_update_subport_stats_on_drop(port, subport,
qindex, pkt, qlen < qsize);
rte_sched_port_update_queue_stats_on_drop(subport, qindex, pkt,
qlen < qsize);
return 0;
}
/* Enqueue packet */
qbase[q->qw & (qsize - 1)] = pkt;
q->qw++;
/* Activate queue in the subport bitmap */
rte_bitmap_set(subport->bmp, qindex);
/* Statistics */
rte_sched_port_update_subport_stats(port, subport, qindex, pkt);
rte_sched_port_update_queue_stats(subport, qindex, pkt);
return 1;
}
/*
* The enqueue function implements a 4-level pipeline with each stage
* processing two different packets. The purpose of using a pipeline
* is to hide the latency of prefetching the data structures. The
* naming convention is presented in the diagram below:
*
* p00 _______ p10 _______ p20 _______ p30 _______
* ----->| |----->| |----->| |----->| |----->
* | 0 | | 1 | | 2 | | 3 |
* ----->|_______|----->|_______|----->|_______|----->|_______|----->
* p01 p11 p21 p31
*
*/
int
rte_sched_port_enqueue(struct rte_sched_port *port, struct rte_mbuf **pkts,
uint32_t n_pkts)
{
struct rte_mbuf *pkt00, *pkt01, *pkt10, *pkt11, *pkt20, *pkt21,
*pkt30, *pkt31, *pkt_last;
struct rte_mbuf **q00_base, **q01_base, **q10_base, **q11_base,
**q20_base, **q21_base, **q30_base, **q31_base, **q_last_base;
struct rte_sched_subport *subport00, *subport01, *subport10, *subport11,
*subport20, *subport21, *subport30, *subport31, *subport_last;
uint32_t q00, q01, q10, q11, q20, q21, q30, q31, q_last;
uint32_t r00, r01, r10, r11, r20, r21, r30, r31, r_last;
uint32_t subport_qmask;
uint32_t result, i;
result = 0;
subport_qmask = (1 << (port->n_pipes_per_subport_log2 + 4)) - 1;
/*
* Less then 6 input packets available, which is not enough to
* feed the pipeline
*/
if (unlikely(n_pkts < 6)) {
struct rte_sched_subport *subports[5];
struct rte_mbuf **q_base[5];
uint32_t q[5];
/* Prefetch the mbuf structure of each packet */
for (i = 0; i < n_pkts; i++)
rte_prefetch0(pkts[i]);
/* Prefetch the subport structure for each packet */
for (i = 0; i < n_pkts; i++)
subports[i] = rte_sched_port_subport(port, pkts[i]);
/* Prefetch the queue structure for each queue */
for (i = 0; i < n_pkts; i++)
q[i] = rte_sched_port_enqueue_qptrs_prefetch0(subports[i],
pkts[i], subport_qmask);
/* Prefetch the write pointer location of each queue */
for (i = 0; i < n_pkts; i++) {
q_base[i] = rte_sched_subport_pipe_qbase(subports[i], q[i]);
rte_sched_port_enqueue_qwa_prefetch0(port, subports[i],
q[i], q_base[i]);
}
/* Write each packet to its queue */
for (i = 0; i < n_pkts; i++)
result += rte_sched_port_enqueue_qwa(port, subports[i],
q[i], q_base[i], pkts[i]);
return result;
}
/* Feed the first 3 stages of the pipeline (6 packets needed) */
pkt20 = pkts[0];
pkt21 = pkts[1];
rte_prefetch0(pkt20);
rte_prefetch0(pkt21);
pkt10 = pkts[2];
pkt11 = pkts[3];
rte_prefetch0(pkt10);
rte_prefetch0(pkt11);
subport20 = rte_sched_port_subport(port, pkt20);
subport21 = rte_sched_port_subport(port, pkt21);
q20 = rte_sched_port_enqueue_qptrs_prefetch0(subport20,
pkt20, subport_qmask);
q21 = rte_sched_port_enqueue_qptrs_prefetch0(subport21,
pkt21, subport_qmask);
pkt00 = pkts[4];
pkt01 = pkts[5];
rte_prefetch0(pkt00);
rte_prefetch0(pkt01);
subport10 = rte_sched_port_subport(port, pkt10);
subport11 = rte_sched_port_subport(port, pkt11);
q10 = rte_sched_port_enqueue_qptrs_prefetch0(subport10,
pkt10, subport_qmask);
q11 = rte_sched_port_enqueue_qptrs_prefetch0(subport11,
pkt11, subport_qmask);
q20_base = rte_sched_subport_pipe_qbase(subport20, q20);
q21_base = rte_sched_subport_pipe_qbase(subport21, q21);
rte_sched_port_enqueue_qwa_prefetch0(port, subport20, q20, q20_base);
rte_sched_port_enqueue_qwa_prefetch0(port, subport21, q21, q21_base);
/* Run the pipeline */
for (i = 6; i < (n_pkts & (~1)); i += 2) {
/* Propagate stage inputs */
pkt30 = pkt20;
pkt31 = pkt21;
pkt20 = pkt10;
pkt21 = pkt11;
pkt10 = pkt00;
pkt11 = pkt01;
q30 = q20;
q31 = q21;
q20 = q10;
q21 = q11;
subport30 = subport20;
subport31 = subport21;
subport20 = subport10;
subport21 = subport11;
q30_base = q20_base;
q31_base = q21_base;
/* Stage 0: Get packets in */
pkt00 = pkts[i];
pkt01 = pkts[i + 1];
rte_prefetch0(pkt00);
rte_prefetch0(pkt01);
/* Stage 1: Prefetch subport and queue structure storing queue pointers */
subport10 = rte_sched_port_subport(port, pkt10);
subport11 = rte_sched_port_subport(port, pkt11);
q10 = rte_sched_port_enqueue_qptrs_prefetch0(subport10,
pkt10, subport_qmask);
q11 = rte_sched_port_enqueue_qptrs_prefetch0(subport11,
pkt11, subport_qmask);
/* Stage 2: Prefetch queue write location */
q20_base = rte_sched_subport_pipe_qbase(subport20, q20);
q21_base = rte_sched_subport_pipe_qbase(subport21, q21);
rte_sched_port_enqueue_qwa_prefetch0(port, subport20, q20, q20_base);
rte_sched_port_enqueue_qwa_prefetch0(port, subport21, q21, q21_base);
/* Stage 3: Write packet to queue and activate queue */
r30 = rte_sched_port_enqueue_qwa(port, subport30,
q30, q30_base, pkt30);
r31 = rte_sched_port_enqueue_qwa(port, subport31,
q31, q31_base, pkt31);
result += r30 + r31;
}
/*
* Drain the pipeline (exactly 6 packets).
* Handle the last packet in the case
* of an odd number of input packets.
*/
pkt_last = pkts[n_pkts - 1];
rte_prefetch0(pkt_last);
subport00 = rte_sched_port_subport(port, pkt00);
subport01 = rte_sched_port_subport(port, pkt01);
q00 = rte_sched_port_enqueue_qptrs_prefetch0(subport00,
pkt00, subport_qmask);
q01 = rte_sched_port_enqueue_qptrs_prefetch0(subport01,
pkt01, subport_qmask);
q10_base = rte_sched_subport_pipe_qbase(subport10, q10);
q11_base = rte_sched_subport_pipe_qbase(subport11, q11);
rte_sched_port_enqueue_qwa_prefetch0(port, subport10, q10, q10_base);
rte_sched_port_enqueue_qwa_prefetch0(port, subport11, q11, q11_base);
r20 = rte_sched_port_enqueue_qwa(port, subport20,
q20, q20_base, pkt20);
r21 = rte_sched_port_enqueue_qwa(port, subport21,
q21, q21_base, pkt21);
result += r20 + r21;
subport_last = rte_sched_port_subport(port, pkt_last);
q_last = rte_sched_port_enqueue_qptrs_prefetch0(subport_last,
pkt_last, subport_qmask);
q00_base = rte_sched_subport_pipe_qbase(subport00, q00);
q01_base = rte_sched_subport_pipe_qbase(subport01, q01);
rte_sched_port_enqueue_qwa_prefetch0(port, subport00, q00, q00_base);
rte_sched_port_enqueue_qwa_prefetch0(port, subport01, q01, q01_base);
r10 = rte_sched_port_enqueue_qwa(port, subport10, q10,
q10_base, pkt10);
r11 = rte_sched_port_enqueue_qwa(port, subport11, q11,
q11_base, pkt11);
result += r10 + r11;
q_last_base = rte_sched_subport_pipe_qbase(subport_last, q_last);
rte_sched_port_enqueue_qwa_prefetch0(port, subport_last,
q_last, q_last_base);
r00 = rte_sched_port_enqueue_qwa(port, subport00, q00,
q00_base, pkt00);
r01 = rte_sched_port_enqueue_qwa(port, subport01, q01,
q01_base, pkt01);
result += r00 + r01;
if (n_pkts & 1) {
r_last = rte_sched_port_enqueue_qwa(port, subport_last,
q_last, q_last_base, pkt_last);
result += r_last;
}
return result;
}
static inline uint64_t
grinder_tc_ov_credits_update(struct rte_sched_port *port,
struct rte_sched_subport *subport, uint32_t pos)
{
struct rte_sched_grinder *grinder = subport->grinder + pos;
struct rte_sched_subport_profile *sp = grinder->subport_params;
uint64_t tc_ov_consumption[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
uint64_t tc_consumption = 0, tc_ov_consumption_max;
uint64_t tc_ov_wm = subport->tc_ov_wm;
uint32_t i;
if (subport->tc_ov == 0)
return subport->tc_ov_wm_max;
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASS_BE; i++) {
tc_ov_consumption[i] = sp->tc_credits_per_period[i]
- subport->tc_credits[i];
tc_consumption += tc_ov_consumption[i];
}
tc_ov_consumption[RTE_SCHED_TRAFFIC_CLASS_BE] =
sp->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE] -
subport->tc_credits[RTE_SCHED_TRAFFIC_CLASS_BE];
tc_ov_consumption_max =
sp->tc_credits_per_period[RTE_SCHED_TRAFFIC_CLASS_BE] -
tc_consumption;
if (tc_ov_consumption[RTE_SCHED_TRAFFIC_CLASS_BE] >
(tc_ov_consumption_max - port->mtu)) {
tc_ov_wm -= tc_ov_wm >> 7;
if (tc_ov_wm < subport->tc_ov_wm_min)
tc_ov_wm = subport->tc_ov_wm_min;
return tc_ov_wm;
}
tc_ov_wm += (tc_ov_wm >> 7) + 1;
if (tc_ov_wm > subport->tc_ov_wm_max)
tc_ov_wm = subport->tc_ov_wm_max;
return tc_ov_wm;
}
static inline void
grinder_credits_update(struct rte_sched_port *port,
struct rte_sched_subport *subport, uint32_t pos)
{
struct rte_sched_grinder *grinder = subport->grinder + pos;
struct rte_sched_pipe *pipe = grinder->pipe;
struct rte_sched_pipe_profile *params = grinder->pipe_params;
struct rte_sched_subport_profile *sp = grinder->subport_params;
uint64_t n_periods;
uint32_t i;
/* Subport TB */
n_periods = (port->time - subport->tb_time) / sp->tb_period;
subport->tb_credits += n_periods * sp->tb_credits_per_period;
subport->tb_credits = RTE_MIN(subport->tb_credits, sp->tb_size);
subport->tb_time += n_periods * sp->tb_period;
/* Pipe TB */
n_periods = (port->time - pipe->tb_time) / params->tb_period;
pipe->tb_credits += n_periods * params->tb_credits_per_period;
pipe->tb_credits = RTE_MIN(pipe->tb_credits, params->tb_size);
pipe->tb_time += n_periods * params->tb_period;
/* Subport TCs */
if (unlikely(port->time >= subport->tc_time)) {
subport->tc_ov_wm =
grinder_tc_ov_credits_update(port, subport, pos);
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
subport->tc_credits[i] = sp->tc_credits_per_period[i];
subport->tc_time = port->time + sp->tc_period;
subport->tc_ov_period_id++;
}
/* Pipe TCs */
if (unlikely(port->time >= pipe->tc_time)) {
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
pipe->tc_credits[i] = params->tc_credits_per_period[i];
pipe->tc_time = port->time + params->tc_period;
}
/* Pipe TCs - Oversubscription */
if (unlikely(pipe->tc_ov_period_id != subport->tc_ov_period_id)) {
pipe->tc_ov_credits = subport->tc_ov_wm * params->tc_ov_weight;
pipe->tc_ov_period_id = subport->tc_ov_period_id;
}
}
static inline int
grinder_credits_check(struct rte_sched_port *port,
struct rte_sched_subport *subport, uint32_t pos)
{
struct rte_sched_grinder *grinder = subport->grinder + pos;
struct rte_sched_pipe *pipe = grinder->pipe;
struct rte_mbuf *pkt = grinder->pkt;
uint32_t tc_index = grinder->tc_index;
uint64_t pkt_len = pkt->pkt_len + port->frame_overhead;
uint64_t subport_tb_credits = subport->tb_credits;
uint64_t subport_tc_credits = subport->tc_credits[tc_index];
uint64_t pipe_tb_credits = pipe->tb_credits;
uint64_t pipe_tc_credits = pipe->tc_credits[tc_index];
uint64_t pipe_tc_ov_mask1[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
uint64_t pipe_tc_ov_mask2[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE] = {0};
uint64_t pipe_tc_ov_credits;
uint32_t i;
int enough_credits;
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
pipe_tc_ov_mask1[i] = ~0LLU;
pipe_tc_ov_mask1[RTE_SCHED_TRAFFIC_CLASS_BE] = pipe->tc_ov_credits;
pipe_tc_ov_mask2[RTE_SCHED_TRAFFIC_CLASS_BE] = ~0LLU;
pipe_tc_ov_credits = pipe_tc_ov_mask1[tc_index];
/* Check pipe and subport credits */
enough_credits = (pkt_len <= subport_tb_credits) &&
(pkt_len <= subport_tc_credits) &&
(pkt_len <= pipe_tb_credits) &&
(pkt_len <= pipe_tc_credits) &&
(pkt_len <= pipe_tc_ov_credits);
if (!enough_credits)
return 0;
/* Update pipe and subport credits */
subport->tb_credits -= pkt_len;
subport->tc_credits[tc_index] -= pkt_len;
pipe->tb_credits -= pkt_len;
pipe->tc_credits[tc_index] -= pkt_len;
pipe->tc_ov_credits -= pipe_tc_ov_mask2[tc_index] & pkt_len;
return 1;
}
static inline int
grinder_schedule(struct rte_sched_port *port,
struct rte_sched_subport *subport, uint32_t pos)
{
struct rte_sched_grinder *grinder = subport->grinder + pos;
struct rte_sched_queue *queue = grinder->queue[grinder->qpos];
uint32_t qindex = grinder->qindex[grinder->qpos];
struct rte_mbuf *pkt = grinder->pkt;
uint32_t pkt_len = pkt->pkt_len + port->frame_overhead;
uint32_t be_tc_active;
if (!grinder_credits_check(port, subport, pos))
return 0;
/* Advance port time */
port->time += pkt_len;
/* Send packet */
port->pkts_out[port->n_pkts_out++] = pkt;
queue->qr++;
be_tc_active = (grinder->tc_index == RTE_SCHED_TRAFFIC_CLASS_BE) ? ~0x0 : 0x0;
grinder->wrr_tokens[grinder->qpos] +=
(pkt_len * grinder->wrr_cost[grinder->qpos]) & be_tc_active;
if (queue->qr == queue->qw) {
rte_bitmap_clear(subport->bmp, qindex);
grinder->qmask &= ~(1 << grinder->qpos);
if (be_tc_active)
grinder->wrr_mask[grinder->qpos] = 0;
rte_sched_port_red_set_queue_empty_timestamp(port, subport, qindex);
}
rte_sched_port_pie_dequeue(subport, qindex, pkt_len, port->time_cpu_cycles);
/* Reset pipe loop detection */
subport->pipe_loop = RTE_SCHED_PIPE_INVALID;
grinder->productive = 1;
return 1;
}
static inline int
grinder_pipe_exists(struct rte_sched_subport *subport, uint32_t base_pipe)
{
uint32_t i;
for (i = 0; i < RTE_SCHED_PORT_N_GRINDERS; i++) {
if (subport->grinder_base_bmp_pos[i] == base_pipe)
return 1;
}
return 0;
}
static inline void
grinder_pcache_populate(struct rte_sched_subport *subport,
uint32_t pos, uint32_t bmp_pos, uint64_t bmp_slab)
{
struct rte_sched_grinder *grinder = subport->grinder + pos;
uint16_t w[4];
grinder->pcache_w = 0;
grinder->pcache_r = 0;
w[0] = (uint16_t) bmp_slab;
w[1] = (uint16_t) (bmp_slab >> 16);
w[2] = (uint16_t) (bmp_slab >> 32);
w[3] = (uint16_t) (bmp_slab >> 48);
grinder->pcache_qmask[grinder->pcache_w] = w[0];
grinder->pcache_qindex[grinder->pcache_w] = bmp_pos;
grinder->pcache_w += (w[0] != 0);
grinder->pcache_qmask[grinder->pcache_w] = w[1];
grinder->pcache_qindex[grinder->pcache_w] = bmp_pos + 16;
grinder->pcache_w += (w[1] != 0);
grinder->pcache_qmask[grinder->pcache_w] = w[2];
grinder->pcache_qindex[grinder->pcache_w] = bmp_pos + 32;
grinder->pcache_w += (w[2] != 0);
grinder->pcache_qmask[grinder->pcache_w] = w[3];
grinder->pcache_qindex[grinder->pcache_w] = bmp_pos + 48;
grinder->pcache_w += (w[3] != 0);
}
static inline void
grinder_tccache_populate(struct rte_sched_subport *subport,
uint32_t pos, uint32_t qindex, uint16_t qmask)
{
struct rte_sched_grinder *grinder = subport->grinder + pos;
uint8_t b, i;
grinder->tccache_w = 0;
grinder->tccache_r = 0;
for (i = 0; i < RTE_SCHED_TRAFFIC_CLASS_BE; i++) {
b = (uint8_t) ((qmask >> i) & 0x1);
grinder->tccache_qmask[grinder->tccache_w] = b;
grinder->tccache_qindex[grinder->tccache_w] = qindex + i;
grinder->tccache_w += (b != 0);
}
b = (uint8_t) (qmask >> (RTE_SCHED_TRAFFIC_CLASS_BE));
grinder->tccache_qmask[grinder->tccache_w] = b;
grinder->tccache_qindex[grinder->tccache_w] = qindex +
RTE_SCHED_TRAFFIC_CLASS_BE;
grinder->tccache_w += (b != 0);
}
static inline int
grinder_next_tc(struct rte_sched_port *port,
struct rte_sched_subport *subport, uint32_t pos)
{
struct rte_sched_grinder *grinder = subport->grinder + pos;
struct rte_mbuf **qbase;
uint32_t qindex;
uint16_t qsize;
if (grinder->tccache_r == grinder->tccache_w)
return 0;
qindex = grinder->tccache_qindex[grinder->tccache_r];
qbase = rte_sched_subport_pipe_qbase(subport, qindex);
qsize = rte_sched_subport_pipe_qsize(port, subport, qindex);
grinder->tc_index = rte_sched_port_pipe_tc(port, qindex);
grinder->qmask = grinder->tccache_qmask[grinder->tccache_r];
grinder->qsize = qsize;
if (grinder->tc_index < RTE_SCHED_TRAFFIC_CLASS_BE) {
grinder->queue[0] = subport->queue + qindex;
grinder->qbase[0] = qbase;
grinder->qindex[0] = qindex;
grinder->tccache_r++;
return 1;
}
grinder->queue[0] = subport->queue + qindex;
grinder->queue[1] = subport->queue + qindex + 1;
grinder->queue[2] = subport->queue + qindex + 2;
grinder->queue[3] = subport->queue + qindex + 3;
grinder->qbase[0] = qbase;
grinder->qbase[1] = qbase + qsize;
grinder->qbase[2] = qbase + 2 * qsize;
grinder->qbase[3] = qbase + 3 * qsize;
grinder->qindex[0] = qindex;
grinder->qindex[1] = qindex + 1;
grinder->qindex[2] = qindex + 2;
grinder->qindex[3] = qindex + 3;
grinder->tccache_r++;
return 1;
}
static inline int
grinder_next_pipe(struct rte_sched_port *port,
struct rte_sched_subport *subport, uint32_t pos)
{
struct rte_sched_grinder *grinder = subport->grinder + pos;
uint32_t pipe_qindex;
uint16_t pipe_qmask;
if (grinder->pcache_r < grinder->pcache_w) {
pipe_qmask = grinder->pcache_qmask[grinder->pcache_r];
pipe_qindex = grinder->pcache_qindex[grinder->pcache_r];
grinder->pcache_r++;
} else {
uint64_t bmp_slab = 0;
uint32_t bmp_pos = 0;
/* Get another non-empty pipe group */
if (unlikely(rte_bitmap_scan(subport->bmp, &bmp_pos, &bmp_slab) <= 0))
return 0;
#ifdef RTE_SCHED_DEBUG
debug_check_queue_slab(subport, bmp_pos, bmp_slab);
#endif
/* Return if pipe group already in one of the other grinders */
subport->grinder_base_bmp_pos[pos] = RTE_SCHED_BMP_POS_INVALID;
if (unlikely(grinder_pipe_exists(subport, bmp_pos)))
return 0;
subport->grinder_base_bmp_pos[pos] = bmp_pos;
/* Install new pipe group into grinder's pipe cache */
grinder_pcache_populate(subport, pos, bmp_pos, bmp_slab);
pipe_qmask = grinder->pcache_qmask[0];
pipe_qindex = grinder->pcache_qindex[0];
grinder->pcache_r = 1;
}
/* Install new pipe in the grinder */
grinder->pindex = pipe_qindex >> 4;
grinder->subport = subport;
grinder->pipe = subport->pipe + grinder->pindex;
grinder->pipe_params = NULL; /* to be set after the pipe structure is prefetched */
grinder->productive = 0;
grinder_tccache_populate(subport, pos, pipe_qindex, pipe_qmask);
grinder_next_tc(port, subport, pos);
/* Check for pipe exhaustion */
if (grinder->pindex == subport->pipe_loop) {
subport->pipe_exhaustion = 1;
subport->pipe_loop = RTE_SCHED_PIPE_INVALID;
}
return 1;
}
static inline void
grinder_wrr_load(struct rte_sched_subport *subport, uint32_t pos)
{
struct rte_sched_grinder *grinder = subport->grinder + pos;
struct rte_sched_pipe *pipe = grinder->pipe;
struct rte_sched_pipe_profile *pipe_params = grinder->pipe_params;
uint32_t qmask = grinder->qmask;
grinder->wrr_tokens[0] =
((uint16_t) pipe->wrr_tokens[0]) << RTE_SCHED_WRR_SHIFT;
grinder->wrr_tokens[1] =
((uint16_t) pipe->wrr_tokens[1]) << RTE_SCHED_WRR_SHIFT;
grinder->wrr_tokens[2] =
((uint16_t) pipe->wrr_tokens[2]) << RTE_SCHED_WRR_SHIFT;
grinder->wrr_tokens[3] =
((uint16_t) pipe->wrr_tokens[3]) << RTE_SCHED_WRR_SHIFT;
grinder->wrr_mask[0] = (qmask & 0x1) * 0xFFFF;
grinder->wrr_mask[1] = ((qmask >> 1) & 0x1) * 0xFFFF;
grinder->wrr_mask[2] = ((qmask >> 2) & 0x1) * 0xFFFF;
grinder->wrr_mask[3] = ((qmask >> 3) & 0x1) * 0xFFFF;
grinder->wrr_cost[0] = pipe_params->wrr_cost[0];
grinder->wrr_cost[1] = pipe_params->wrr_cost[1];
grinder->wrr_cost[2] = pipe_params->wrr_cost[2];
grinder->wrr_cost[3] = pipe_params->wrr_cost[3];
}
static inline void
grinder_wrr_store(struct rte_sched_subport *subport, uint32_t pos)
{
struct rte_sched_grinder *grinder = subport->grinder + pos;
struct rte_sched_pipe *pipe = grinder->pipe;
pipe->wrr_tokens[0] =
(grinder->wrr_tokens[0] & grinder->wrr_mask[0]) >>
RTE_SCHED_WRR_SHIFT;
pipe->wrr_tokens[1] =
(grinder->wrr_tokens[1] & grinder->wrr_mask[1]) >>
RTE_SCHED_WRR_SHIFT;
pipe->wrr_tokens[2] =
(grinder->wrr_tokens[2] & grinder->wrr_mask[2]) >>
RTE_SCHED_WRR_SHIFT;
pipe->wrr_tokens[3] =
(grinder->wrr_tokens[3] & grinder->wrr_mask[3]) >>
RTE_SCHED_WRR_SHIFT;
}
static inline void
grinder_wrr(struct rte_sched_subport *subport, uint32_t pos)
{
struct rte_sched_grinder *grinder = subport->grinder + pos;
uint16_t wrr_tokens_min;
grinder->wrr_tokens[0] |= ~grinder->wrr_mask[0];
grinder->wrr_tokens[1] |= ~grinder->wrr_mask[1];
grinder->wrr_tokens[2] |= ~grinder->wrr_mask[2];
grinder->wrr_tokens[3] |= ~grinder->wrr_mask[3];
grinder->qpos = rte_min_pos_4_u16(grinder->wrr_tokens);
wrr_tokens_min = grinder->wrr_tokens[grinder->qpos];
grinder->wrr_tokens[0] -= wrr_tokens_min;
grinder->wrr_tokens[1] -= wrr_tokens_min;
grinder->wrr_tokens[2] -= wrr_tokens_min;
grinder->wrr_tokens[3] -= wrr_tokens_min;
}
#define grinder_evict(subport, pos)
static inline void
grinder_prefetch_pipe(struct rte_sched_subport *subport, uint32_t pos)
{
struct rte_sched_grinder *grinder = subport->grinder + pos;
rte_prefetch0(grinder->pipe);
rte_prefetch0(grinder->queue[0]);
}
static inline void
grinder_prefetch_tc_queue_arrays(struct rte_sched_subport *subport, uint32_t pos)
{
struct rte_sched_grinder *grinder = subport->grinder + pos;
uint16_t qsize, qr[RTE_SCHED_MAX_QUEUES_PER_TC];
qsize = grinder->qsize;
grinder->qpos = 0;
if (grinder->tc_index < RTE_SCHED_TRAFFIC_CLASS_BE) {
qr[0] = grinder->queue[0]->qr & (qsize - 1);
rte_prefetch0(grinder->qbase[0] + qr[0]);
return;
}
qr[0] = grinder->queue[0]->qr & (qsize - 1);
qr[1] = grinder->queue[1]->qr & (qsize - 1);
qr[2] = grinder->queue[2]->qr & (qsize - 1);
qr[3] = grinder->queue[3]->qr & (qsize - 1);
rte_prefetch0(grinder->qbase[0] + qr[0]);
rte_prefetch0(grinder->qbase[1] + qr[1]);
grinder_wrr_load(subport, pos);
grinder_wrr(subport, pos);
rte_prefetch0(grinder->qbase[2] + qr[2]);
rte_prefetch0(grinder->qbase[3] + qr[3]);
}
static inline void
grinder_prefetch_mbuf(struct rte_sched_subport *subport, uint32_t pos)
{
struct rte_sched_grinder *grinder = subport->grinder + pos;
uint32_t qpos = grinder->qpos;
struct rte_mbuf **qbase = grinder->qbase[qpos];
uint16_t qsize = grinder->qsize;
uint16_t qr = grinder->queue[qpos]->qr & (qsize - 1);
grinder->pkt = qbase[qr];
rte_prefetch0(grinder->pkt);
if (unlikely((qr & 0x7) == 7)) {
uint16_t qr_next = (grinder->queue[qpos]->qr + 1) & (qsize - 1);
rte_prefetch0(qbase + qr_next);
}
}
static inline uint32_t
grinder_handle(struct rte_sched_port *port,
struct rte_sched_subport *subport, uint32_t pos)
{
struct rte_sched_grinder *grinder = subport->grinder + pos;
switch (grinder->state) {
case e_GRINDER_PREFETCH_PIPE:
{
if (grinder_next_pipe(port, subport, pos)) {
grinder_prefetch_pipe(subport, pos);
subport->busy_grinders++;
grinder->state = e_GRINDER_PREFETCH_TC_QUEUE_ARRAYS;
return 0;
}
return 0;
}
case e_GRINDER_PREFETCH_TC_QUEUE_ARRAYS:
{
struct rte_sched_pipe *pipe = grinder->pipe;
grinder->pipe_params = subport->pipe_profiles + pipe->profile;
grinder->subport_params = port->subport_profiles +
subport->profile;
grinder_prefetch_tc_queue_arrays(subport, pos);
grinder_credits_update(port, subport, pos);
grinder->state = e_GRINDER_PREFETCH_MBUF;
return 0;
}
case e_GRINDER_PREFETCH_MBUF:
{
grinder_prefetch_mbuf(subport, pos);
grinder->state = e_GRINDER_READ_MBUF;
return 0;
}
case e_GRINDER_READ_MBUF:
{
uint32_t wrr_active, result = 0;
result = grinder_schedule(port, subport, pos);
wrr_active = (grinder->tc_index == RTE_SCHED_TRAFFIC_CLASS_BE);
/* Look for next packet within the same TC */
if (result && grinder->qmask) {
if (wrr_active)
grinder_wrr(subport, pos);
grinder_prefetch_mbuf(subport, pos);
return 1;
}
if (wrr_active)
grinder_wrr_store(subport, pos);
/* Look for another active TC within same pipe */
if (grinder_next_tc(port, subport, pos)) {
grinder_prefetch_tc_queue_arrays(subport, pos);
grinder->state = e_GRINDER_PREFETCH_MBUF;
return result;
}
if (grinder->productive == 0 &&
subport->pipe_loop == RTE_SCHED_PIPE_INVALID)
subport->pipe_loop = grinder->pindex;
grinder_evict(subport, pos);
/* Look for another active pipe */
if (grinder_next_pipe(port, subport, pos)) {
grinder_prefetch_pipe(subport, pos);
grinder->state = e_GRINDER_PREFETCH_TC_QUEUE_ARRAYS;
return result;
}
/* No active pipe found */
subport->busy_grinders--;
grinder->state = e_GRINDER_PREFETCH_PIPE;
return result;
}
default:
rte_panic("Algorithmic error (invalid state)\n");
return 0;
}
}
static inline void
rte_sched_port_time_resync(struct rte_sched_port *port)
{
uint64_t cycles = rte_get_tsc_cycles();
uint64_t cycles_diff;
uint64_t bytes_diff;
uint32_t i;
if (cycles < port->time_cpu_cycles)
port->time_cpu_cycles = 0;
cycles_diff = cycles - port->time_cpu_cycles;
/* Compute elapsed time in bytes */
bytes_diff = rte_reciprocal_divide(cycles_diff << RTE_SCHED_TIME_SHIFT,
port->inv_cycles_per_byte);
/* Advance port time */
port->time_cpu_cycles +=
(bytes_diff * port->cycles_per_byte) >> RTE_SCHED_TIME_SHIFT;
port->time_cpu_bytes += bytes_diff;
if (port->time < port->time_cpu_bytes)
port->time = port->time_cpu_bytes;
/* Reset pipe loop detection */
for (i = 0; i < port->n_subports_per_port; i++)
port->subports[i]->pipe_loop = RTE_SCHED_PIPE_INVALID;
}
static inline int
rte_sched_port_exceptions(struct rte_sched_subport *subport, int second_pass)
{
int exceptions;
/* Check if any exception flag is set */
exceptions = (second_pass && subport->busy_grinders == 0) ||
(subport->pipe_exhaustion == 1);
/* Clear exception flags */
subport->pipe_exhaustion = 0;
return exceptions;
}
int
rte_sched_port_dequeue(struct rte_sched_port *port, struct rte_mbuf **pkts, uint32_t n_pkts)
{
struct rte_sched_subport *subport;
uint32_t subport_id = port->subport_id;
uint32_t i, n_subports = 0, count;
port->pkts_out = pkts;
port->n_pkts_out = 0;
rte_sched_port_time_resync(port);
/* Take each queue in the grinder one step further */
for (i = 0, count = 0; ; i++) {
subport = port->subports[subport_id];
count += grinder_handle(port, subport,
i & (RTE_SCHED_PORT_N_GRINDERS - 1));
if (count == n_pkts) {
subport_id++;
if (subport_id == port->n_subports_per_port)
subport_id = 0;
port->subport_id = subport_id;
break;
}
if (rte_sched_port_exceptions(subport, i >= RTE_SCHED_PORT_N_GRINDERS)) {
i = 0;
subport_id++;
n_subports++;
}
if (subport_id == port->n_subports_per_port)
subport_id = 0;
if (n_subports == port->n_subports_per_port) {
port->subport_id = subport_id;
break;
}
}
return count;
}
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