From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755287Ab2ITNem (ORCPT ); Thu, 20 Sep 2012 09:34:42 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:52867 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752856Ab2ITNek (ORCPT ); Thu, 20 Sep 2012 09:34:40 -0400 Message-ID: <505B1B6C.5060904@gmail.com> Date: Thu, 20 Sep 2012 07:34:36 -0600 From: David Ahern User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:15.0) Gecko/20120907 Thunderbird/15.0.1 MIME-Version: 1.0 To: Dong Hao , acme@infradead.org CC: mtosatti@redhat.com, avi@redhat.com, mingo@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, xiaoguangrong@linux.vnet.ibm.com, runzhen@linux.vnet.ibm.com Subject: Re: [PATCH v8 3/3] KVM: perf: kvm events analysis tool References: <1347870675-31495-1-git-send-email-haodong@linux.vnet.ibm.com> <1347870675-31495-4-git-send-email-haodong@linux.vnet.ibm.com> In-Reply-To: <1347870675-31495-4-git-send-email-haodong@linux.vnet.ibm.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/17/12 2:31 AM, Dong Hao wrote: > From: Xiao Guangrong > > Add 'perf kvm stat' support to analyze kvm vmexit/mmio/ioport smartly > > Usage: > - kvm stat > run a command and gather performance counter statistics, it is the alias of > perf stat > > - trace kvm events: > perf kvm stat record, or, if other tracepoints are interesting as well, we > can append the events like this: > perf kvm stat record -e timer:* -a > > If many guests are running, we can track the specified guest by using -p or > --pid, -a is used to track events generated by all guests. > > - show the result: > perf kvm stat report > > The output example is following: > # pgrep qemu > 13005 > 13059 > > total 2 guests are running on the host > > Then, track the guest whose pid is 13059: > # ./perf kvm stat record -p 13059 > ^C[ perf record: Woken up 1 times to write data ] > [ perf record: Captured and wrote 0.253 MB perf.data.guest (~11065 samples) ] > > See the vmexit events: > # ./perf kvm stat report --event=vmexit > > > Analyze events for all VCPUs: > > VM-EXIT Samples Samples% Time% Avg time > > APIC_ACCESS 460 70.55% 0.01% 22.44us ( +- 1.75% ) > HLT 93 14.26% 99.98% 832077.26us ( +- 10.42% ) > EXTERNAL_INTERRUPT 64 9.82% 0.00% 35.35us ( +- 14.21% ) > PENDING_INTERRUPT 24 3.68% 0.00% 9.29us ( +- 31.39% ) > CR_ACCESS 7 1.07% 0.00% 8.12us ( +- 5.76% ) > IO_INSTRUCTION 3 0.46% 0.00% 18.00us ( +- 11.79% ) > EXCEPTION_NMI 1 0.15% 0.00% 5.83us ( +- -nan% ) > > Total Samples:652, Total events handled time:77396109.80us. > > See the mmio events: > # ./perf kvm stat report --event=mmio > > > Analyze events for all VCPUs: > > MMIO Access Samples Samples% Time% Avg time > > 0xfee00380:W 387 84.31% 79.28% 8.29us ( +- 3.32% ) > 0xfee00300:W 24 5.23% 9.96% 16.79us ( +- 1.97% ) > 0xfee00300:R 24 5.23% 7.83% 13.20us ( +- 3.00% ) > 0xfee00310:W 24 5.23% 2.93% 4.94us ( +- 3.84% ) > > Total Samples:459, Total events handled time:4044.59us. > > See the ioport event: > # ./perf kvm stat report --event=ioport > > > Analyze events for all VCPUs: > > IO Port Access Samples Samples% Time% Avg time > > 0xc050:POUT 3 100.00% 100.00% 13.75us ( +- 10.83% ) > > Total Samples:3, Total events handled time:41.26us. > > And, --vcpu is used to track the specified vcpu and --key is used to sort the > result: > # ./perf kvm stat report --event=vmexit --vcpu=0 --key=time > > > Analyze events for VCPU 0: > > VM-EXIT Samples Samples% Time% Avg time > > HLT 27 13.85% 99.97% 405790.24us ( +- 12.70% ) > EXTERNAL_INTERRUPT 13 6.67% 0.00% 27.94us ( +- 22.26% ) > APIC_ACCESS 146 74.87% 0.03% 21.69us ( +- 2.91% ) > IO_INSTRUCTION 2 1.03% 0.00% 17.77us ( +- 20.56% ) > CR_ACCESS 2 1.03% 0.00% 8.55us ( +- 6.47% ) > PENDING_INTERRUPT 5 2.56% 0.00% 6.27us ( +- 3.94% ) > > Total Samples:195, Total events handled time:10959950.90us. > > [ Dong Hao > Runzhen Wang : > > - rebase it on current acme's tree > > - fix the compiling-error on i386 > > ] > > Signed-off-by: Xiao Guangrong > Signed-off-by: Dong Hao > Signed-off-by: Runzhen Wang > --- > tools/perf/Documentation/perf-kvm.txt | 30 ++- > tools/perf/MANIFEST | 3 + > tools/perf/builtin-kvm.c | 840 ++++++++++++++++++++++++++++++++- > tools/perf/util/header.c | 59 +++- > tools/perf/util/header.h | 1 + > tools/perf/util/thread.h | 2 + > 6 files changed, 929 insertions(+), 6 deletions(-) > Acked-by: David Ahern