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[2.35.170.8]) by smtp.gmail.com with ESMTPSA id u201sm1530895wmu.11.2016.02.12.01.36.58 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 12 Feb 2016 01:36:58 -0800 (PST) From: Dario Faggioli To: xen-devel@lists.xenproject.org Date: Fri, 12 Feb 2016 10:36:57 +0100 Message-ID: <20160212093657.16002.48157.stgit@Solace.station> In-Reply-To: <20160212093501.16002.32635.stgit@Solace.station> References: <20160212093501.16002.32635.stgit@Solace.station> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Cc: George Dunlap Subject: [Xen-devel] [PATCH v2 1/2] xen: credit1: trace vCPU boost/unboost X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 --- Cc: George Dunlap --- 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 671bbee..5708701 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) /* @@ -856,7 +858,11 @@ 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 @@ -1023,6 +1029,8 @@ 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 76ee803..21c1e0b 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")