From: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxxxxxx> Changelog: - rebased it on Arnaldo's 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(-) -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
