From d5c4a55e007db102ee6bd1ac771f0b05458609c2 Mon Sep 17 00:00:00 2001 From: Praveen Kumar Date: Wed, 25 Jan 2017 10:51:47 +0100 Subject: [PATCH] credit2: performance counter for load balancing call 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 Acked-by: Dario Faggioli --- xen/common/sched_credit2.c | 2 ++ xen/include/xen/perfc_defn.h | 1 + 2 files changed, 3 insertions(+) diff --git a/xen/common/sched_credit2.c b/xen/common/sched_credit2.c index 2ce738dcd9..b2f2b17ade 100644 --- a/xen/common/sched_credit2.c +++ b/xen/common/sched_credit2.c @@ -1887,6 +1887,8 @@ 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 900fddd9d2..0d702f04c8 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") -- 2.30.2