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Date: Mon, 27 Aug 2012 17:59:18 +0800 From: Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com> To: Dong Hao <haodong@...ux.vnet.ibm.com> CC: avi@...hat.com, acme@...radead.org, mtosatti@...hat.com, mingo@...e.hu, linux-kernel@...r.kernel.org, kvm@...r.kernel.org, David Ahern <dsahern@...il.com> Subject: Re: [PATCH v7 0/3] KVM: perf: kvm events analysis tool CC David. Hi David, I should apologize to you that Dong forgot to post the patchset to you. Could you pick these up from the mail list? On 08/27/2012 05:51 PM, Dong Hao wrote: > From: Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com> > > Changelog: > - rebased it on Arnaldo's newest git tree perf/core branch > > the change from Arnaldo's comments: > - directly get event from evsel->tp_format > - remove die() and return the proper error code > - rename thread->private to thread->priv > > the change from David's comments: > - use is_valid_tracepoint instead of kvm_events_exist > > This patchset introduces a perf-based tool (perf kvm stat record/report) > which can analyze kvm events more smartly. Below is the presentation slice > on 2012 Japan LinuxCon: > http://events.linuxfoundation.org/images/stories/pdf/lcjp2012_guangrong.pdf > You can get more details from it. If any questions/comments, please feel free > to let us know. > > This patchset is based on Arnaldo's git tree perf/core branch, and patch 2 > is just doing the "improvement" work, which can be picked up independently. > > > 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 kvm:* > If many guests are running, we can track the specified guest by using -p or > --pid > > - show the result: > perf kvm stat report > > The output example is following: > # pgrep qemu-kvm > 26071 > 32253 > 32564 > > total 3 guests are running on the host > > Then, track the guest whose pid is 26071: > # ./perf kvm stat record -p 26071 > ^C[ perf record: Woken up 9 times to write data ] > [ perf record: Captured and wrote 24.903 MB perf.data.guest (~1088034 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 65381 66.58% 5.95% 37.72us ( +- 6.54% ) > EXTERNAL_INTERRUPT 16031 16.32% 3.06% 79.11us ( +- 7.34% ) > CPUID 5360 5.46% 0.06% 4.50us ( +- 35.07% ) > HLT 4496 4.58% 90.75% 8360.34us ( +- 5.22% ) > EPT_VIOLATION 2667 2.72% 0.04% 5.49us ( +- 5.05% ) > PENDING_INTERRUPT 2242 2.28% 0.03% 5.25us ( +- 2.96% ) > EXCEPTION_NMI 1332 1.36% 0.02% 6.53us ( +- 6.51% ) > IO_INSTRUCTION 383 0.39% 0.09% 93.39us ( +- 40.92% ) > CR_ACCESS 310 0.32% 0.00% 6.10us ( +- 3.95% ) > > Total Samples:98202, Total events handled time:41419293.63us. > > See the mmio events: > # ./perf kvm stat report --event=mmio > > Analyze events for all VCPUs: > > MMIO Access Samples Samples% Time% Avg time > > 0xfee00380:W 58686 90.21% 15.67% 4.95us ( +- 2.96% ) > 0xfee00300:R 2124 3.26% 1.48% 12.93us ( +- 14.75% ) > 0xfee00310:W 2124 3.26% 0.34% 3.00us ( +- 1.33% ) > 0xfee00300:W 2123 3.26% 82.50% 720.68us ( +- 10.24% ) > > Total Samples:65057, Total events handled time:1854470.45us. > > See the ioport event: > # ./perf kvm stat report --event=ioport > > Analyze events for all VCPUs: > > IO Port Access Samples Samples% Time% Avg time > > 0xc090:POUT 383 100.00% 100.00% 89.00us ( +- 42.94% ) > > Total Samples:383, Total events handled time:34085.56us. > > 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 551 5.05% 94.81% 9501.72us ( +- 12.52% ) > EXTERNAL_INTERRUPT 1390 12.74% 2.39% 94.80us ( +- 20.92% ) > APIC_ACCESS 6186 56.68% 2.62% 23.41us ( +- 23.62% ) > IO_INSTRUCTION 17 0.16% 0.01% 20.39us ( +- 22.33% ) > EXCEPTION_NMI 94 0.86% 0.01% 6.07us ( +- 7.13% ) > PENDING_INTERRUPT 199 1.82% 0.02% 5.48us ( +- 4.36% ) > CR_ACCESS 52 0.48% 0.00% 4.89us ( +- 4.09% ) > EPT_VIOLATION 2057 18.85% 0.12% 3.15us ( +- 1.33% ) > CPUID 368 3.37% 0.02% 2.82us ( +- 2.79% ) > > Total Samples:10914, Total events handled time:5521782.02us. > > > Dong Hao (3): > KVM: x86: export svm/vmx exit code and vector code to userspace > KVM: x86: trace mmio begin and complete > KVM: perf: kvm events analysis tool > > arch/x86/include/asm/kvm_host.h | 36 +- > arch/x86/include/asm/svm.h | 205 +++++--- > arch/x86/include/asm/vmx.h | 126 +++-- > arch/x86/kvm/trace.h | 89 ---- > arch/x86/kvm/x86.c | 32 +- > include/trace/events/kvm.h | 37 ++ > tools/perf/Documentation/perf-kvm.txt | 30 +- > tools/perf/MANIFEST | 3 + > tools/perf/builtin-kvm.c | 889 ++++++++++++++++++++++++++++++++- > tools/perf/util/header.c | 54 ++- > tools/perf/util/header.h | 1 + > tools/perf/util/thread.h | 2 + > 12 files changed, 1264 insertions(+), 240 deletions(-) > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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