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dpif-netdev: log port/core affinity

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When using multiple PMDs and numerous ports, a performance gain
may be achieved in some use cases by pinning a PMD/port to a
particular (set of) core(s).

This patch provides a summary of the switch's port/core affinities
each time that the status of the switch's ports is modified.
Based on this information, a user may determine what affinity
modifications are required to optimise performance for their
particular use case.

Signed-off-by: Mark Kavanagh <mark.b.kavanagh@intel.com>
Signed-off-by: Wojciech Andralojc <wojciechx.andralojc@intel.com>
Acked-by: Flavio Leitner <fbl@redhat.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
This commit is contained in:
Mark Kavanagh
2015-06-09 07:49:18 -07:00
committed by Pravin B Shelar
parent dc6ba5dc8b
commit 7dd671f08e
1 changed files with 5 additions and 0 deletions
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5
lib/dpif-netdev.c
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@@ -2678,6 +2678,11 @@ reload:
emc_cache_init(&pmd->flow_cache);
poll_cnt = pmd_load_queues(pmd, &poll_list, poll_cnt);
/* List port/core affinity */
for (i = 0; i < poll_cnt; i++) {
VLOG_INFO("Core %d processing port \'%s\'\n", pmd->core_id, netdev_get_name(poll_list[i].port->netdev));
}
/* Signal here to make sure the pmd finishes
* reloading the updated configuration. */
dp_netdev_pmd_reload_done(pmd);