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Violators will be prosecuted; Fri, 24 Feb 2017 00:56:44 +1000 Received: from d23relay08.au.ibm.com (d23relay08.au.ibm.com [9.185.71.33]) by d23dlp01.au.ibm.com (Postfix) with ESMTP id 5DD1E2CE8054; Fri, 24 Feb 2017 01:56:44 +1100 (EST) Received: from d23av04.au.ibm.com (d23av04.au.ibm.com [9.190.235.139]) by d23relay08.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v1NEuaKd9633792; Fri, 24 Feb 2017 01:56:44 +1100 Received: from d23av04.au.ibm.com (localhost [127.0.0.1]) by d23av04.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id v1NEuBdl027591; Fri, 24 Feb 2017 01:56:12 +1100 Received: from localhost.in.ibm.com ([9.124.35.101]) by d23av04.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id v1NEu199027181; Fri, 24 Feb 2017 01:56:11 +1100 From: Nitesh Konkar To: libvir-list@redhat.com Date: Thu, 23 Feb 2017 20:25:33 +0530 In-Reply-To: <1487861739-24929-1-git-send-email-niteshkonkar.libvirt@gmail.com> References: <1487861739-24929-1-git-send-email-niteshkonkar.libvirt@gmail.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 17022314-0040-0000-0000-000002F327BE X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17022314-0041-0000-0000-00000C4C79C6 Message-Id: <1487861739-24929-5-git-send-email-niteshkonkar.libvirt@gmail.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-02-23_11:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=15 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1612050000 definitions=main-1702230140 X-Greylist: Sender passed SPF test, Sender IP whitelisted by DNSRBL, ACL 200 matched, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Thu, 23 Feb 2017 14:56:50 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Thu, 23 Feb 2017 14:56:50 +0000 (UTC) for IP:'148.163.156.1' DOMAIN:'mx0a-001b2d01.pphosted.com' HELO:'mx0a-001b2d01.pphosted.com' FROM:'niteshkonkar.libvirt@gmail.com' RCPT:'' X-RedHat-Spam-Score: 1.06 * (BAYES_50, DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM, NML_ADSP_CUSTOM_MED, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H2, SPF_SOFTFAIL) 148.163.156.1 mx0a-001b2d01.pphosted.com 148.163.156.1 mx0a-001b2d01.pphosted.com X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-Scanned-By: MIMEDefang 2.78 on 10.5.110.31 X-loop: libvir-list@redhat.com Cc: Nitesh Konkar , Nitesh Konkar Subject: [libvirt] [PATCH v2 04/10] perf: add context_switches software perf event support X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" This patch adds support and documentation for the context_switches perf event. Signed-off-by: Nitesh Konkar --- docs/formatdomain.html.in | 7 +++++++ docs/schemas/domaincommon.rng | 1 + include/libvirt/libvirt-domain.h | 10 ++++++++++ src/libvirt-domain.c | 3 +++ src/qemu/qemu_driver.c | 1 + src/util/virperf.c | 6 +++++- src/util/virperf.h | 1 + tests/genericxml2xmlindata/generic-perf.xml | 1 + tools/virsh.pod | 3 +++ 9 files changed, 32 insertions(+), 1 deletion(-) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index 72d33fa..bff699f 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -1939,6 +1939,7 @@ <event name=3D'cpu_clock' enabled=3D'no'/> <event name=3D'task_clock' enabled=3D'no'/> <event name=3D'page_faults' enabled=3D'no'/> + <event name=3D'context_switches' enabled=3D'no'/> </perf> ... @@ -2038,6 +2039,12 @@ types of page faults perf.page_faults + + context_switches + the count of context switches by applications running on + the platform + perf.context_switches + =20

Devices

diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng index 856a2f7..1a4b6cb 100644 --- a/docs/schemas/domaincommon.rng +++ b/docs/schemas/domaincommon.rng @@ -436,6 +436,7 @@ cpu_clock task_clock page_faults + context_switches diff --git a/include/libvirt/libvirt-domain.h b/include/libvirt/libvirt-dom= ain.h index 1a6cb19..f7e4cd2 100644 --- a/include/libvirt/libvirt-domain.h +++ b/include/libvirt/libvirt-domain.h @@ -2220,6 +2220,16 @@ void virDomainStatsRecordListFree(virDomainStatsReco= rdPtr *stats); */ # define VIR_PERF_PARAM_PAGE_FAULTS "page_faults" =20 +/** + * VIR_PERF_PARAM_CONTEXT_SWITCHES: + * + * Macro for typed parameter name that represents context_switches + * perf event which can be used to measure the count of context + * switches by applications running on the platform. It corresponds + * to the "perf.context_switches" field in the *Stats APIs. + */ +# define VIR_PERF_PARAM_CONTEXT_SWITCHES "context_switches" + =20 int virDomainGetPerfEvents(virDomainPtr dom, virTypedParameterPtr *params, diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c index 77c6e8a..6b29d14 100644 --- a/src/libvirt-domain.c +++ b/src/libvirt-domain.c @@ -11256,6 +11256,9 @@ virConnectGetDomainCapabilities(virConnectPtr conn, * It is produced by the task_clock perf event. * "perf.page_faults" - The count of page faults as unsigned long long. * It is produced by the page_faults perf event + * "perf.context_switches" - The count of context switches as unsigned= long + * long. It is produced by the context_switc= hes + * perf event. * * Note that entire stats groups or individual stat fields may be missing = from * the output in case they are not supported by the given hypervisor, are = not diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 10d4e59..8d6df1a 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -9572,6 +9572,7 @@ qemuDomainSetPerfEvents(virDomainPtr dom, VIR_PERF_PARAM_CPU_CLOCK, VIR_TYPED_PARAM_B= OOLEAN, VIR_PERF_PARAM_TASK_CLOCK, VIR_TYPED_PARAM_= BOOLEAN, VIR_PERF_PARAM_PAGE_FAULTS, VIR_TYPED_PARAM= _BOOLEAN, + VIR_PERF_PARAM_CONTEXT_SWITCHES, VIR_TYPED_= PARAM_BOOLEAN, NULL) < 0) return -1; =20 diff --git a/src/util/virperf.c b/src/util/virperf.c index 4ae13af..ba81e08 100644 --- a/src/util/virperf.c +++ b/src/util/virperf.c @@ -44,7 +44,8 @@ VIR_ENUM_IMPL(virPerfEvent, VIR_PERF_EVENT_LAST, "branch_instructions", "branch_misses", "bus_cycles", "stalled_cycles_frontend", "stalled_cycles_backend", "ref_cpu_cycles", - "cpu_clock", "task_clock", "page_faults"); + "cpu_clock", "task_clock", "page_faults", + "context_switches"); =20 struct virPerfEvent { int type; @@ -122,6 +123,9 @@ static struct virPerfEventAttr attrs[] =3D { {.type =3D VIR_PERF_EVENT_PAGE_FAULTS, .attrType =3D PERF_TYPE_SOFTWARE, .attrConfig =3D PERF_COUNT_SW_PAGE_FAULTS}, + {.type =3D VIR_PERF_EVENT_CONTEXT_SWITCHES, + .attrType =3D PERF_TYPE_SOFTWARE, + .attrConfig =3D PERF_COUNT_SW_CONTEXT_SWITCHES}, }; typedef struct virPerfEventAttr *virPerfEventAttrPtr; =20 diff --git a/src/util/virperf.h b/src/util/virperf.h index 182a9ec..2adc549 100644 --- a/src/util/virperf.h +++ b/src/util/virperf.h @@ -50,6 +50,7 @@ typedef enum { VIR_PERF_EVENT_CPU_CLOCK, /* Count of cpu clock time*/ VIR_PERF_EVENT_TASK_CLOCK, /* Count of task clock time*/ VIR_PERF_EVENT_PAGE_FAULTS, /* Count of total page faults */ + VIR_PERF_EVENT_CONTEXT_SWITCHES, /* Count of context switches */ =20 VIR_PERF_EVENT_LAST } virPerfEventType; diff --git a/tests/genericxml2xmlindata/generic-perf.xml b/tests/genericxml= 2xmlindata/generic-perf.xml index 3f27887..29a2273 100644 --- a/tests/genericxml2xmlindata/generic-perf.xml +++ b/tests/genericxml2xmlindata/generic-perf.xml @@ -29,6 +29,7 @@ + diff --git a/tools/virsh.pod b/tools/virsh.pod index 81fd0fb..eb7c255 100644 --- a/tools/virsh.pod +++ b/tools/virsh.pod @@ -967,6 +967,7 @@ I<--perf> returns the statistics of all enabled perf ev= ents: "perf.cpu_clock" - the count of cpu clock time "perf.task_clock" - the count of task clock time "perf.page_faults" - the count of page faults + "perf.context_switches" - the count of context switches. =20 See the B command for more details about each event. =20 @@ -2342,6 +2343,8 @@ B applications running on the platform. page_faults - Provides the count of page faults by applications running on the platform + context_switches - Provides the count of context switches + by applications running on the platform =20 B: The statistics can be retrieved using the B command usi= ng the I<--perf> flag. --=20 1.9.3 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list