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power: add get/set empty-poll maximum API

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Add new get/set APIs to configure emptypoll max which is used to
determine when a queue can go into sleep state.

Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
Acked-by: Ray Kinsella <mdr@ashroe.eu>
Tested-by: David Hunt <david.hunt@intel.com>
This commit is contained in:
Kevin Laatz 2022-06-02 16:13:36 +01:00 committed by Thomas Monjalon
parent 406937f89f
commit 9e9e945bf6
4 changed files with 55 additions and 3 deletions
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6
doc/guides/prog_guide/power_man.rst
View File

@ -252,6 +252,12 @@ API Overview for Ethernet PMD Power Management
* **Queue Disable**: Disable power scheme for certain queue/port/core.
* **Get Emptypoll Max**: Get the configured number of empty polls to wait before
entering sleep state.
* **Set Emptypoll Max**: Set the number of empty polls to wait before entering
sleep state.
References
----------

21
lib/power/rte_power_pmd_mgmt.c
View File

@ -11,7 +11,7 @@
#include "rte_power_pmd_mgmt.h"
#define EMPTYPOLL_MAX 512
unsigned int emptypoll_max;
/* store some internal state */
static struct pmd_conf_data {
@ -206,7 +206,7 @@ queue_can_sleep(struct pmd_core_cfg *cfg, struct queue_list_entry *qcfg)
qcfg->n_empty_polls++;
/* if we haven't reached threshold for empty polls, we can't sleep */
if (qcfg->n_empty_polls <= EMPTYPOLL_MAX)
if (qcfg->n_empty_polls <= emptypoll_max)
return false;
/*
@ -290,7 +290,7 @@ clb_umwait(uint16_t port_id, uint16_t qidx, struct rte_mbuf **pkts __rte_unused,
/* this callback can't do more than one queue, omit multiqueue logic */
if (unlikely(nb_rx == 0)) {
queue_conf->n_empty_polls++;
if (unlikely(queue_conf->n_empty_polls > EMPTYPOLL_MAX)) {
if (unlikely(queue_conf->n_empty_polls > emptypoll_max)) {
struct rte_power_monitor_cond pmc;
int ret;
@ -661,6 +661,18 @@ rte_power_ethdev_pmgmt_queue_disable(unsigned int lcore_id,
return 0;
}
void
rte_power_pmd_mgmt_set_emptypoll_max(unsigned int max)
{
emptypoll_max = max;
}
unsigned int
rte_power_pmd_mgmt_get_emptypoll_max(void)
{
return emptypoll_max;
}
RTE_INIT(rte_power_ethdev_pmgmt_init) {
size_t i;
@ -669,4 +681,7 @@ RTE_INIT(rte_power_ethdev_pmgmt_init) {
struct pmd_core_cfg *cfg = &lcore_cfgs[i];
TAILQ_INIT(&cfg->head);
}
/* initialize config defaults */
emptypoll_max = 512;
}

27
lib/power/rte_power_pmd_mgmt.h
View File

@ -90,6 +90,33 @@ int
rte_power_ethdev_pmgmt_queue_disable(unsigned int lcore_id,
uint16_t port_id, uint16_t queue_id);
/**
* @warning
* @b EXPERIMENTAL: this API may change, or be removed, without prior notice.
*
* Set a emptypoll_max to specified value. Used to specify the number of empty
* polls to wait before entering sleep state.
*
* @param max
* The value to set emptypoll_max to.
*/
__rte_experimental
void
rte_power_pmd_mgmt_set_emptypoll_max(unsigned int max);
/**
* @warning
* @b EXPERIMENTAL: this API may change, or be removed, without prior notice.
*
* Get the current value of emptypoll_max.
*
* @return
* The current emptypoll_max value
*/
__rte_experimental
unsigned int
rte_power_pmd_mgmt_get_emptypoll_max(void);
#ifdef __cplusplus
}
#endif

4
lib/power/version.map
View File

@ -38,4 +38,8 @@ EXPERIMENTAL {
# added in 21.02
rte_power_ethdev_pmgmt_queue_disable;
rte_power_ethdev_pmgmt_queue_enable;
# added in 22.07
rte_power_pmd_mgmt_get_emptypoll_max;
rte_power_pmd_mgmt_set_emptypoll_max;
};