From: Mark Kavanagh <mark.b.kavanagh@intel.com>
Date: Tue, 9 Jun 2015 14:49:18 +0000 (-0700)
Subject: dpif-netdev: log port/core affinity
X-Git-Tag: v2.4.0~65
X-Git-Url: http://git.cascardo.eti.br/?p=cascardo%2Fovs.git;a=commitdiff_plain;h=2322af3d415e5149af696193a12a2866f3fd0dff

dpif-netdev: log port/core affinity

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>
---

diff --git a/lib/dpif-netdev.c b/lib/dpif-netdev.c
index f13169c14..f4033e46f 100644
--- a/lib/dpif-netdev.c
+++ b/lib/dpif-netdev.c
@@ -2664,6 +2664,11 @@ 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);