* [PATCH v3] xen: credit2: performance counter for load balancing call
@ 2017-01-24 18:54 Praveen Kumar
0 siblings, 0 replies; only message in thread
From: Praveen Kumar @ 2017-01-24 18:54 UTC (permalink / raw
To: xen-devel; +Cc: george.dunlap, dario.faggioli, Praveen Kumar
The patch introduces a new performance counter that counts how many times we go
through the load balancing logic in Credit2.
Signed-off-by: Praveen Kumar <kpraveen.lkml@gmail.com>
Acked-by: Dario Faggioli <dario.faggioli@citrix.com>
---
diff --git a/xen/common/sched_credit2.c b/xen/common/sched_credit2.c
index ef8e0d8..f212338 100644
--- a/xen/common/sched_credit2.c
+++ b/xen/common/sched_credit2.c
@@ -1869,6 +1869,8 @@ retry:
(unsigned char *)&d);
}
+ SCHED_STAT_CRANK(acct_load_balance);
+
/* Look for "swap" which gives the best load average
* FIXME: O(n^2)! */
diff --git a/xen/include/xen/perfc_defn.h b/xen/include/xen/perfc_defn.h
index 900fddd..0d702f0 100644
--- a/xen/include/xen/perfc_defn.h
+++ b/xen/include/xen/perfc_defn.h
@@ -57,6 +57,7 @@ PERFCOUNTER(vcpu_hot, "csched: vcpu_hot")
/* credit2 specific counters */
PERFCOUNTER(burn_credits_t2c, "csched2: burn_credits_t2c")
+PERFCOUNTER(acct_load_balance, "csched2: acct_load_balance")
PERFCOUNTER(upd_max_weight_quick, "csched2: update_max_weight_quick")
PERFCOUNTER(upd_max_weight_full, "csched2: update_max_weight_full")
PERFCOUNTER(migrate_requested, "csched2: migrate_requested")
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2017-01-24 18:54 [PATCH v3] xen: credit2: performance counter for load balancing call Praveen Kumar
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