numam-dpdk/app/test/test_distributor.c

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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2017 Intel Corporation
*/
#include "test.h"
#include <unistd.h>
#include <string.h>
#include <rte_cycles.h>
#include <rte_errno.h>
#include <rte_mempool.h>
#include <rte_mbuf.h>
#include <rte_distributor.h>
#include <rte_string_fns.h>
#define ITER_POWER 20 /* log 2 of how many iterations we do when timing. */
#define BURST 32
#define BIG_BATCH 1024
struct worker_params {
char name[64];
struct rte_distributor *dist;
};
struct worker_params worker_params;
/* statics - all zero-initialized by default */
static volatile int quit; /**< general quit variable for all threads */
static volatile int zero_quit; /**< var for when we just want thr0 to quit*/
static volatile unsigned worker_idx;
struct worker_stats {
volatile unsigned handled_packets;
} __rte_cache_aligned;
struct worker_stats worker_stats[RTE_MAX_LCORE];
/* returns the total count of the number of packets handled by the worker
* functions given below.
*/
static inline unsigned
total_packet_count(void)
{
unsigned i, count = 0;
for (i = 0; i < worker_idx; i++)
count += worker_stats[i].handled_packets;
return count;
}
/* resets the packet counts for a new test */
static inline void
clear_packet_count(void)
{
memset(&worker_stats, 0, sizeof(worker_stats));
}
/* this is the basic worker function for sanity test
* it does nothing but return packets and count them.
*/
static int
handle_work(void *arg)
{
struct rte_mbuf *buf[8] __rte_cache_aligned;
struct worker_params *wp = arg;
struct rte_distributor *db = wp->dist;
unsigned int count = 0, num = 0;
unsigned int id = __atomic_fetch_add(&worker_idx, 1, __ATOMIC_RELAXED);
int i;
for (i = 0; i < 8; i++)
buf[i] = NULL;
num = rte_distributor_get_pkt(db, id, buf, buf, num);
while (!quit) {
__atomic_fetch_add(&worker_stats[id].handled_packets, num,
__ATOMIC_RELAXED);
count += num;
num = rte_distributor_get_pkt(db, id,
buf, buf, num);
}
__atomic_fetch_add(&worker_stats[id].handled_packets, num,
__ATOMIC_RELAXED);
count += num;
rte_distributor_return_pkt(db, id, buf, num);
return 0;
}
/* do basic sanity testing of the distributor. This test tests the following:
* - send 32 packets through distributor with the same tag and ensure they
* all go to the one worker
* - send 32 packets through the distributor with two different tags and
* verify that they go equally to two different workers.
* - send 32 packets with different tags through the distributors and
* just verify we get all packets back.
* - send 1024 packets through the distributor, gathering the returned packets
* as we go. Then verify that we correctly got all 1024 pointers back again,
* not necessarily in the same order (as different flows).
*/
static int
sanity_test(struct worker_params *wp, struct rte_mempool *p)
{
struct rte_distributor *db = wp->dist;
struct rte_mbuf *bufs[BURST];
struct rte_mbuf *returns[BURST*2];
unsigned int i, count;
unsigned int retries;
printf("=== Basic distributor sanity tests ===\n");
clear_packet_count();
if (rte_mempool_get_bulk(p, (void *)bufs, BURST) != 0) {
printf("line %d: Error getting mbufs from pool\n", __LINE__);
return -1;
}
/* now set all hash values in all buffers to zero, so all pkts go to the
* one worker thread */
for (i = 0; i < BURST; i++)
bufs[i]->hash.usr = 0;
rte_distributor_process(db, bufs, BURST);
count = 0;
do {
rte_distributor_flush(db);
count += rte_distributor_returned_pkts(db,
returns, BURST*2);
} while (count < BURST);
if (total_packet_count() != BURST) {
printf("Line %d: Error, not all packets flushed. "
"Expected %u, got %u\n",
__LINE__, BURST, total_packet_count());
return -1;
}
for (i = 0; i < rte_lcore_count() - 1; i++)
printf("Worker %u handled %u packets\n", i,
worker_stats[i].handled_packets);
printf("Sanity test with all zero hashes done.\n");
/* pick two flows and check they go correctly */
if (rte_lcore_count() >= 3) {
clear_packet_count();
for (i = 0; i < BURST; i++)
bufs[i]->hash.usr = (i & 1) << 8;
rte_distributor_process(db, bufs, BURST);
count = 0;
do {
rte_distributor_flush(db);
count += rte_distributor_returned_pkts(db,
returns, BURST*2);
} while (count < BURST);
if (total_packet_count() != BURST) {
printf("Line %d: Error, not all packets flushed. "
"Expected %u, got %u\n",
__LINE__, BURST, total_packet_count());
return -1;
}
for (i = 0; i < rte_lcore_count() - 1; i++)
printf("Worker %u handled %u packets\n", i,
worker_stats[i].handled_packets);
printf("Sanity test with two hash values done\n");
}
/* give a different hash value to each packet,
* so load gets distributed */
clear_packet_count();
for (i = 0; i < BURST; i++)
bufs[i]->hash.usr = i+1;
rte_distributor_process(db, bufs, BURST);
count = 0;
do {
rte_distributor_flush(db);
count += rte_distributor_returned_pkts(db,
returns, BURST*2);
} while (count < BURST);
if (total_packet_count() != BURST) {
printf("Line %d: Error, not all packets flushed. "
"Expected %u, got %u\n",
__LINE__, BURST, total_packet_count());
return -1;
}
for (i = 0; i < rte_lcore_count() - 1; i++)
printf("Worker %u handled %u packets\n", i,
worker_stats[i].handled_packets);
printf("Sanity test with non-zero hashes done\n");
rte_mempool_put_bulk(p, (void *)bufs, BURST);
/* sanity test with BIG_BATCH packets to ensure they all arrived back
* from the returned packets function */
clear_packet_count();
struct rte_mbuf *many_bufs[BIG_BATCH], *return_bufs[BIG_BATCH];
unsigned num_returned = 0;
/* flush out any remaining packets */
rte_distributor_flush(db);
rte_distributor_clear_returns(db);
if (rte_mempool_get_bulk(p, (void *)many_bufs, BIG_BATCH) != 0) {
printf("line %d: Error getting mbufs from pool\n", __LINE__);
return -1;
}
for (i = 0; i < BIG_BATCH; i++)
many_bufs[i]->hash.usr = i << 2;
printf("=== testing big burst (%s) ===\n", wp->name);
for (i = 0; i < BIG_BATCH/BURST; i++) {
rte_distributor_process(db,
&many_bufs[i*BURST], BURST);
count = rte_distributor_returned_pkts(db,
&return_bufs[num_returned],
BIG_BATCH - num_returned);
num_returned += count;
}
rte_distributor_flush(db);
count = rte_distributor_returned_pkts(db,
&return_bufs[num_returned],
BIG_BATCH - num_returned);
num_returned += count;
retries = 0;
do {
rte_distributor_flush(db);
count = rte_distributor_returned_pkts(db,
&return_bufs[num_returned],
BIG_BATCH - num_returned);
num_returned += count;
retries++;
} while ((num_returned < BIG_BATCH) && (retries < 100));
if (num_returned != BIG_BATCH) {
printf("line %d: Missing packets, expected %d\n",
__LINE__, num_returned);
return -1;
}
/* big check - make sure all packets made it back!! */
for (i = 0; i < BIG_BATCH; i++) {
unsigned j;
struct rte_mbuf *src = many_bufs[i];
for (j = 0; j < BIG_BATCH; j++) {
if (return_bufs[j] == src)
break;
}
if (j == BIG_BATCH) {
printf("Error: could not find source packet #%u\n", i);
return -1;
}
}
printf("Sanity test of returned packets done\n");
rte_mempool_put_bulk(p, (void *)many_bufs, BIG_BATCH);
printf("\n");
return 0;
}
/* to test that the distributor does not lose packets, we use this worker
* function which frees mbufs when it gets them. The distributor thread does
* the mbuf allocation. If distributor drops packets we'll eventually run out
* of mbufs.
*/
static int
handle_work_with_free_mbufs(void *arg)
{
struct rte_mbuf *buf[8] __rte_cache_aligned;
struct worker_params *wp = arg;
struct rte_distributor *d = wp->dist;
unsigned int count = 0;
unsigned int i;
unsigned int num = 0;
unsigned int id = __atomic_fetch_add(&worker_idx, 1, __ATOMIC_RELAXED);
for (i = 0; i < 8; i++)
buf[i] = NULL;
num = rte_distributor_get_pkt(d, id, buf, buf, num);
while (!quit) {
worker_stats[id].handled_packets += num;
count += num;
for (i = 0; i < num; i++)
rte_pktmbuf_free(buf[i]);
num = rte_distributor_get_pkt(d,
id, buf, buf, num);
}
worker_stats[id].handled_packets += num;
count += num;
rte_distributor_return_pkt(d, id, buf, num);
return 0;
}
/* Perform a sanity test of the distributor with a large number of packets,
* where we allocate a new set of mbufs for each burst. The workers then
* free the mbufs. This ensures that we don't have any packet leaks in the
* library.
*/
static int
sanity_test_with_mbuf_alloc(struct worker_params *wp, struct rte_mempool *p)
{
struct rte_distributor *d = wp->dist;
unsigned i;
struct rte_mbuf *bufs[BURST];
printf("=== Sanity test with mbuf alloc/free (%s) ===\n", wp->name);
clear_packet_count();
for (i = 0; i < ((1<<ITER_POWER)); i += BURST) {
unsigned j;
while (rte_mempool_get_bulk(p, (void *)bufs, BURST) < 0)
rte_distributor_process(d, NULL, 0);
for (j = 0; j < BURST; j++) {
bufs[j]->hash.usr = (i+j) << 1;
rte_mbuf_refcnt_set(bufs[j], 1);
}
rte_distributor_process(d, bufs, BURST);
}
rte_distributor_flush(d);
rte_delay_us(10000);
if (total_packet_count() < (1<<ITER_POWER)) {
printf("Line %u: Packet count is incorrect, %u, expected %u\n",
__LINE__, total_packet_count(),
(1<<ITER_POWER));
return -1;
}
printf("Sanity test with mbuf alloc/free passed\n\n");
return 0;
}
static int
handle_work_for_shutdown_test(void *arg)
{
struct rte_mbuf *pkt = NULL;
struct rte_mbuf *buf[8] __rte_cache_aligned;
struct worker_params *wp = arg;
struct rte_distributor *d = wp->dist;
unsigned int count = 0;
unsigned int num = 0;
unsigned int total = 0;
unsigned int i;
unsigned int returned = 0;
const unsigned int id = __atomic_fetch_add(&worker_idx, 1,
__ATOMIC_RELAXED);
num = rte_distributor_get_pkt(d, id, buf, buf, num);
/* wait for quit single globally, or for worker zero, wait
* for zero_quit */
while (!quit && !(id == 0 && zero_quit)) {
worker_stats[id].handled_packets += num;
count += num;
for (i = 0; i < num; i++)
rte_pktmbuf_free(buf[i]);
num = rte_distributor_get_pkt(d,
id, buf, buf, num);
total += num;
}
worker_stats[id].handled_packets += num;
count += num;
returned = rte_distributor_return_pkt(d, id, buf, num);
if (id == 0) {
/* for worker zero, allow it to restart to pick up last packet
* when all workers are shutting down.
*/
while (zero_quit)
usleep(100);
num = rte_distributor_get_pkt(d,
id, buf, buf, num);
while (!quit) {
worker_stats[id].handled_packets += num;
count += num;
rte_pktmbuf_free(pkt);
num = rte_distributor_get_pkt(d, id, buf, buf, num);
}
returned = rte_distributor_return_pkt(d,
id, buf, num);
printf("Num returned = %d\n", returned);
}
return 0;
}
/* Perform a sanity test of the distributor with a large number of packets,
* where we allocate a new set of mbufs for each burst. The workers then
* free the mbufs. This ensures that we don't have any packet leaks in the
* library.
*/
static int
sanity_test_with_worker_shutdown(struct worker_params *wp,
struct rte_mempool *p)
{
struct rte_distributor *d = wp->dist;
struct rte_mbuf *bufs[BURST];
unsigned i;
printf("=== Sanity test of worker shutdown ===\n");
clear_packet_count();
if (rte_mempool_get_bulk(p, (void *)bufs, BURST) != 0) {
printf("line %d: Error getting mbufs from pool\n", __LINE__);
return -1;
}
/*
* Now set all hash values in all buffers to same value so all
* pkts go to the one worker thread
*/
for (i = 0; i < BURST; i++)
bufs[i]->hash.usr = 1;
rte_distributor_process(d, bufs, BURST);
rte_distributor_flush(d);
/* at this point, we will have processed some packets and have a full
* backlog for the other ones at worker 0.
*/
/* get more buffers to queue up, again setting them to the same flow */
if (rte_mempool_get_bulk(p, (void *)bufs, BURST) != 0) {
printf("line %d: Error getting mbufs from pool\n", __LINE__);
return -1;
}
for (i = 0; i < BURST; i++)
bufs[i]->hash.usr = 1;
/* get worker zero to quit */
zero_quit = 1;
rte_distributor_process(d, bufs, BURST);
/* flush the distributor */
rte_distributor_flush(d);
rte_delay_us(10000);
for (i = 0; i < rte_lcore_count() - 1; i++)
printf("Worker %u handled %u packets\n", i,
worker_stats[i].handled_packets);
if (total_packet_count() != BURST * 2) {
printf("Line %d: Error, not all packets flushed. "
"Expected %u, got %u\n",
__LINE__, BURST * 2, total_packet_count());
return -1;
}
printf("Sanity test with worker shutdown passed\n\n");
return 0;
}
/* Test that the flush function is able to move packets between workers when
* one worker shuts down..
*/
static int
test_flush_with_worker_shutdown(struct worker_params *wp,
struct rte_mempool *p)
{
struct rte_distributor *d = wp->dist;
struct rte_mbuf *bufs[BURST];
unsigned i;
printf("=== Test flush fn with worker shutdown (%s) ===\n", wp->name);
clear_packet_count();
if (rte_mempool_get_bulk(p, (void *)bufs, BURST) != 0) {
printf("line %d: Error getting mbufs from pool\n", __LINE__);
return -1;
}
/* now set all hash values in all buffers to zero, so all pkts go to the
* one worker thread */
for (i = 0; i < BURST; i++)
bufs[i]->hash.usr = 0;
rte_distributor_process(d, bufs, BURST);
/* at this point, we will have processed some packets and have a full
* backlog for the other ones at worker 0.
*/
/* get worker zero to quit */
zero_quit = 1;
/* flush the distributor */
rte_distributor_flush(d);
rte_delay_us(10000);
zero_quit = 0;
for (i = 0; i < rte_lcore_count() - 1; i++)
printf("Worker %u handled %u packets\n", i,
worker_stats[i].handled_packets);
if (total_packet_count() != BURST) {
printf("Line %d: Error, not all packets flushed. "
"Expected %u, got %u\n",
__LINE__, BURST, total_packet_count());
return -1;
}
printf("Flush test with worker shutdown passed\n\n");
return 0;
}
static
int test_error_distributor_create_name(void)
{
struct rte_distributor *d = NULL;
struct rte_distributor *db = NULL;
char *name = NULL;
d = rte_distributor_create(name, rte_socket_id(),
rte_lcore_count() - 1,
RTE_DIST_ALG_SINGLE);
if (d != NULL || rte_errno != EINVAL) {
printf("ERROR: No error on create() with NULL name param\n");
return -1;
}
db = rte_distributor_create(name, rte_socket_id(),
rte_lcore_count() - 1,
RTE_DIST_ALG_BURST);
if (db != NULL || rte_errno != EINVAL) {
printf("ERROR: No error on create() with NULL param\n");
return -1;
}
return 0;
}
static
int test_error_distributor_create_numworkers(void)
{
struct rte_distributor *ds = NULL;
struct rte_distributor *db = NULL;
ds = rte_distributor_create("test_numworkers", rte_socket_id(),
RTE_MAX_LCORE + 10,
RTE_DIST_ALG_SINGLE);
if (ds != NULL || rte_errno != EINVAL) {
printf("ERROR: No error on create() with num_workers > MAX\n");
return -1;
}
db = rte_distributor_create("test_numworkers", rte_socket_id(),
RTE_MAX_LCORE + 10,
RTE_DIST_ALG_BURST);
if (db != NULL || rte_errno != EINVAL) {
printf("ERROR: No error on create() num_workers > MAX\n");
return -1;
}
return 0;
}
/* Useful function which ensures that all worker functions terminate */
static void
quit_workers(struct worker_params *wp, struct rte_mempool *p)
{
struct rte_distributor *d = wp->dist;
const unsigned num_workers = rte_lcore_count() - 1;
unsigned i;
struct rte_mbuf *bufs[RTE_MAX_LCORE];
rte_mempool_get_bulk(p, (void *)bufs, num_workers);
zero_quit = 0;
quit = 1;
for (i = 0; i < num_workers; i++)
bufs[i]->hash.usr = i << 1;
rte_distributor_process(d, bufs, num_workers);
rte_mempool_put_bulk(p, (void *)bufs, num_workers);
rte_distributor_process(d, NULL, 0);
rte_distributor_flush(d);
rte_eal_mp_wait_lcore();
quit = 0;
worker_idx = 0;
}
static int
test_distributor(void)
{
static struct rte_distributor *ds;
static struct rte_distributor *db;
static struct rte_distributor *dist[2];
static struct rte_mempool *p;
int i;
if (rte_lcore_count() < 2) {
printf("Not enough cores for distributor_autotest, expecting at least 2\n");
return TEST_SKIPPED;
}
if (db == NULL) {
db = rte_distributor_create("Test_dist_burst", rte_socket_id(),
rte_lcore_count() - 1,
RTE_DIST_ALG_BURST);
if (db == NULL) {
printf("Error creating burst distributor\n");
return -1;
}
} else {
rte_distributor_flush(db);
rte_distributor_clear_returns(db);
}
if (ds == NULL) {
ds = rte_distributor_create("Test_dist_single",
rte_socket_id(),
rte_lcore_count() - 1,
RTE_DIST_ALG_SINGLE);
if (ds == NULL) {
printf("Error creating single distributor\n");
return -1;
}
} else {
rte_distributor_flush(ds);
rte_distributor_clear_returns(ds);
}
const unsigned nb_bufs = (511 * rte_lcore_count()) < BIG_BATCH ?
(BIG_BATCH * 2) - 1 : (511 * rte_lcore_count());
if (p == NULL) {
p = rte_pktmbuf_pool_create("DT_MBUF_POOL", nb_bufs, BURST,
0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
if (p == NULL) {
printf("Error creating mempool\n");
return -1;
}
}
dist[0] = ds;
dist[1] = db;
for (i = 0; i < 2; i++) {
worker_params.dist = dist[i];
if (i)
strlcpy(worker_params.name, "burst",
sizeof(worker_params.name));
else
strlcpy(worker_params.name, "single",
sizeof(worker_params.name));
rte_eal_mp_remote_launch(handle_work,
&worker_params, SKIP_MASTER);
if (sanity_test(&worker_params, p) < 0)
goto err;
quit_workers(&worker_params, p);
rte_eal_mp_remote_launch(handle_work_with_free_mbufs,
&worker_params, SKIP_MASTER);
if (sanity_test_with_mbuf_alloc(&worker_params, p) < 0)
goto err;
quit_workers(&worker_params, p);
if (rte_lcore_count() > 2) {
rte_eal_mp_remote_launch(handle_work_for_shutdown_test,
&worker_params,
SKIP_MASTER);
if (sanity_test_with_worker_shutdown(&worker_params,
p) < 0)
goto err;
quit_workers(&worker_params, p);
rte_eal_mp_remote_launch(handle_work_for_shutdown_test,
&worker_params,
SKIP_MASTER);
if (test_flush_with_worker_shutdown(&worker_params,
p) < 0)
goto err;
quit_workers(&worker_params, p);
} else {
printf("Too few cores to run worker shutdown test\n");
}
}
if (test_error_distributor_create_numworkers() == -1 ||
test_error_distributor_create_name() == -1) {
printf("rte_distributor_create parameter check tests failed");
return -1;
}
return 0;
err:
quit_workers(&worker_params, p);
return -1;
}
REGISTER_TEST_COMMAND(distributor_autotest, test_distributor);