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dpif-netdev: Set PMD load based sleep start/inc to 1 us.

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Now that the timer slack for the PMD threads is reduced we can also
reduce the start/increment for PMD load based sleeping to match it.

This will further reduce initial sleep times making it more resilient
to interfaces that might be sensitive to large sleep times.

Signed-off-by: Kevin Traynor <ktraynor@redhat.com>
Reviewed-by: David Marchand <david.marchand@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
This commit is contained in:
Kevin Traynor
2023-01-18 16:23:56 +00:00
committed by Ilya Maximets
parent f62629a558
commit 948767a18d
4 changed files with 10 additions and 18 deletions
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3
lib/dpif-netdev.c
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@@ -177,7 +177,7 @@ static struct odp_support dp_netdev_support = {
/* Number of pkts Rx on an interface that will stop pmd thread sleeping. */
#define PMD_SLEEP_THRESH (NETDEV_MAX_BURST / 2)
/* Time in uS to increment a pmd thread sleep time. */
#define PMD_SLEEP_INC_US 10
#define PMD_SLEEP_INC_US 1
struct dpcls {
struct cmap_node node; /* Within dp_netdev_pmd_thread.classifiers */
@@ -4983,7 +4983,6 @@ dpif_netdev_set_config(struct dpif *dpif, const struct smap *other_config)
set_pmd_auto_lb(dp, autolb_state, log_autolb);
pmd_max_sleep = smap_get_ullong(other_config, "pmd-maxsleep", 0);
pmd_max_sleep = ROUND_UP(pmd_max_sleep, 10);
pmd_max_sleep = MIN(PMD_RCU_QUIESCE_INTERVAL, pmd_max_sleep);
atomic_read_relaxed(&dp->pmd_max_sleep, &cur_pmd_max_sleep);
if (first_set_config || pmd_max_sleep != cur_pmd_max_sleep) {