Messages in this thread | | | From | "Li,Rongqing" <> | Subject | RE: [PATCH][resend] perf x86 kvm-stat: support to analyze kvm msr | Date | Thu, 22 Apr 2021 01:46:48 +0000 |
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Ping
-Li
> -----Original Message----- > From: Li,Rongqing > Sent: Thursday, April 15, 2021 3:00 PM > To: linux-kernel@vger.kernel.org; namhyung@kernel.org; jolsa@redhat.com; > alexander.shishkin@linux.intel.com; mark.rutland@arm.com; > acme@kernel.org; mingo@redhat.com; peterz@infradead.org; Li,Rongqing > <lirongqing@baidu.com> > Subject: [PATCH][resend] perf x86 kvm-stat: support to analyze kvm msr > > From: Lei Zhao <zhaolei27@baidu.com> > > usage: > - kvm stat > run a command and gather performance counter statistics > > - show the result: > perf kvm stat report --event=msr > > See the msr events: > > Analyze events for all VMs, all VCPUs: > > MSR Access Samples Samples% Time% Min Time Max Time Avg time > > 0x6e0:W 67007 98.17% 98.31% 0.59us 10.69us 0.90us ( +- > 0.10% ) > 0x830:W 1186 1.74% 1.60% 0.53us 108.34us 0.82us ( +- > 11.02% ) > 0x3b:R 66 0.10% 0.09% 0.56us 1.26us 0.80us ( +- > 3.24% ) > > Total Samples:68259, Total events handled time:61150.95us. > > Signed-off-by: Li RongQing <lirongqing@baidu.com> > Signed-off-by: Lei Zhao <zhaolei27@baidu.com> > --- > tools/perf/arch/x86/util/kvm-stat.c | 46 > +++++++++++++++++++++++++++++++++++ > 1 files changed, 46 insertions(+), 0 deletions(-) > > diff --git a/tools/perf/arch/x86/util/kvm-stat.c > b/tools/perf/arch/x86/util/kvm-stat.c > index 0729204..c5dd54f 100644 > --- a/tools/perf/arch/x86/util/kvm-stat.c > +++ b/tools/perf/arch/x86/util/kvm-stat.c > @@ -133,11 +133,56 @@ static void ioport_event_decode_key(struct > perf_kvm_stat *kvm __maybe_unused, > .name = "IO Port Access" > }; > > + /* The time of emulation msr is from kvm_msr to kvm_entry. */ static > +void msr_event_get_key(struct evsel *evsel, > + struct perf_sample *sample, > + struct event_key *key) > +{ > + key->key = evsel__intval(evsel, sample, "ecx"); > + key->info = evsel__intval(evsel, sample, "write"); } > + > +static bool msr_event_begin(struct evsel *evsel, > + struct perf_sample *sample, > + struct event_key *key) > +{ > + if (!strcmp(evsel->name, "kvm:kvm_msr")) { > + msr_event_get_key(evsel, sample, key); > + return true; > + } > + > + return false; > +} > + > +static bool msr_event_end(struct evsel *evsel, > + struct perf_sample *sample __maybe_unused, > + struct event_key *key __maybe_unused) { > + return kvm_entry_event(evsel); > +} > + > +static void msr_event_decode_key(struct perf_kvm_stat *kvm > __maybe_unused, > + struct event_key *key, > + char *decode) > +{ > + scnprintf(decode, decode_str_len, "%#llx:%s", > + (unsigned long long)key->key, > + key->info ? "W" : "R"); > +} > + > +static struct kvm_events_ops msr_events = { > + .is_begin_event = msr_event_begin, > + .is_end_event = msr_event_end, > + .decode_key = msr_event_decode_key, > + .name = "MSR Access" > +}; > + > const char *kvm_events_tp[] = { > "kvm:kvm_entry", > "kvm:kvm_exit", > "kvm:kvm_mmio", > "kvm:kvm_pio", > + "kvm:kvm_msr", > NULL, > }; > > @@ -145,6 +190,7 @@ struct kvm_reg_events_ops kvm_reg_events_ops[] = { > { .name = "vmexit", .ops = &exit_events }, > { .name = "mmio", .ops = &mmio_events }, > { .name = "ioport", .ops = &ioport_events }, > + { .name = "msr", .ops = &msr_events }, > { NULL, NULL }, > }; > > -- > 1.7.1
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