From 3c7d1da274845309942e8b1680148d62773af4b6 Mon Sep 17 00:00:00 2001 From: Dario Faggioli Date: Wed, 24 Feb 2016 12:03:32 +0100 Subject: [PATCH] credit1: trace vCPU boost/unboost Add tracepoints and a performance counter for boosting and unboosting in Credit1. Note that they (the trace points) do not cover the case of the idle vCPU being boosted to run a tasklet, as there already is TRC_CSCHED_SCHED_TASKLET for that. Signed-off-by: Dario Faggioli Reviewed-by: George Dunlap Acked-by: Jan Beulich --- xen/common/sched_credit.c | 8 ++++++++ xen/include/xen/perfc_defn.h | 1 + 2 files changed, 9 insertions(+) diff --git a/xen/common/sched_credit.c b/xen/common/sched_credit.c index c336bace7b..0af5f69630 100644 --- a/xen/common/sched_credit.c +++ b/xen/common/sched_credit.c @@ -126,6 +126,8 @@ #define TRC_CSCHED_STOLEN_VCPU TRC_SCHED_CLASS_EVT(CSCHED, 4) #define TRC_CSCHED_PICKED_CPU TRC_SCHED_CLASS_EVT(CSCHED, 5) #define TRC_CSCHED_TICKLE TRC_SCHED_CLASS_EVT(CSCHED, 6) +#define TRC_CSCHED_BOOST_START TRC_SCHED_CLASS_EVT(CSCHED, 7) +#define TRC_CSCHED_BOOST_END TRC_SCHED_CLASS_EVT(CSCHED, 8) /* @@ -855,7 +857,11 @@ csched_vcpu_acct(struct csched_private *prv, unsigned int cpu) * amount of CPU resources and should no longer be boosted. */ if ( svc->pri == CSCHED_PRI_TS_BOOST ) + { svc->pri = CSCHED_PRI_TS_UNDER; + TRACE_2D(TRC_CSCHED_BOOST_END, svc->sdom->dom->domain_id, + svc->vcpu->vcpu_id); + } /* * Update credits @@ -1021,6 +1027,8 @@ csched_vcpu_wake(const struct scheduler *ops, struct vcpu *vc) if ( svc->pri == CSCHED_PRI_TS_UNDER && !test_bit(CSCHED_FLAG_VCPU_PARKED, &svc->flags) ) { + TRACE_2D(TRC_CSCHED_BOOST_START, vc->domain->domain_id, vc->vcpu_id); + SCHED_STAT_CRANK(vcpu_boost); svc->pri = CSCHED_PRI_TS_BOOST; } diff --git a/xen/include/xen/perfc_defn.h b/xen/include/xen/perfc_defn.h index 76ee8031a1..21c1e0b54d 100644 --- a/xen/include/xen/perfc_defn.h +++ b/xen/include/xen/perfc_defn.h @@ -40,6 +40,7 @@ PERFCOUNTER(acct_reorder, "csched: acct_reorder") PERFCOUNTER(acct_min_credit, "csched: acct_min_credit") PERFCOUNTER(acct_vcpu_active, "csched: acct_vcpu_active") PERFCOUNTER(acct_vcpu_idle, "csched: acct_vcpu_idle") +PERFCOUNTER(vcpu_boost, "csched: vcpu_boost") PERFCOUNTER(vcpu_park, "csched: vcpu_park") PERFCOUNTER(vcpu_unpark, "csched: vcpu_unpark") PERFCOUNTER(load_balance_idle, "csched: load_balance_idle") -- 2.30.2