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| author | Kan Liang <kan.liang@linux.intel.com> | 2018-03-01 18:08:58 -0500 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-03-05 10:41:36 -0300 |
| commit | 53172f9057e92c9b27f0bbf2a46827d87f12b0d2 (patch) | |
| tree | 7133e4436eae0b7a5e5526c0203a53344a8f19b8 /tools/perf/builtin-kvm.c | |
| parent | ad46e48c65fa1f204fa29eaff1b91174d314a94b (diff) | |
| download | linux-53172f9057e92c9b27f0bbf2a46827d87f12b0d2.tar.bz2 | |
perf kvm: Switch to new perf_mmap__read_event() interface
The perf kvm still use the legacy interface.
Switch to the new perf_mmap__read_event() interface for perf kvm.
No functional change.
Committer notes:
Tested before and after running:
# perf kvm stat record
On a machine with a kvm guest, then used:
# perf kvm stat report
Before/after results match and look like:
# perf kvm stat record -a sleep 5
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 2.132 MB perf.data.guest (1828 samples) ]
# perf kvm stat report
Analyze events for all VMs, all VCPUs:
VM-EXIT Samples Samples% Time% Min Time Max Time Avg time
IO_INSTRUCTION 258 40.06% 0.08% 3.51us 122.54us 14.87us (+- 6.76%)
MSR_WRITE 178 27.64% 0.01% 0.47us 6.34us 2.18us (+- 4.80%)
EPT_MISCONFIG 148 22.98% 0.03% 3.76us 65.60us 11.22us (+- 8.14%)
HLT 47 7.30% 99.88% 181.69us 249988.06us 102061.36us (+-13.49%)
PAUSE_INSTRUCTION 5 0.78% 0.00% 0.38us 0.79us 0.47us (+-17.05%)
MSR_READ 4 0.62% 0.00% 1.14us 3.33us 2.67us (+-19.35%)
EXTERNAL_INTERRUPT 2 0.31% 0.00% 2.15us 2.17us 2.16us (+- 0.30%)
PENDING_INTERRUPT 1 0.16% 0.00% 2.56us 2.56us 2.56us (+- 0.00%)
PREEMPTION_TIMER 1 0.16% 0.00% 3.21us 3.21us 3.21us (+- 0.00%)
Total Samples:644, Total events handled time:4802790.72us.
#
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1519945751-37786-1-git-send-email-kan.liang@linux.intel.com
[ Changed bool parameters from 0 to 'false', as per Jiri comment ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-kvm.c')
| -rw-r--r-- | tools/perf/builtin-kvm.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c index 55d919dc5bc6..d2703d3b8366 100644 --- a/tools/perf/builtin-kvm.c +++ b/tools/perf/builtin-kvm.c @@ -743,16 +743,24 @@ static bool verify_vcpu(int vcpu) static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx, u64 *mmap_time) { + struct perf_evlist *evlist = kvm->evlist; union perf_event *event; + struct perf_mmap *md; + u64 end, start; u64 timestamp; s64 n = 0; int err; *mmap_time = ULLONG_MAX; - while ((event = perf_evlist__mmap_read(kvm->evlist, idx)) != NULL) { - err = perf_evlist__parse_sample_timestamp(kvm->evlist, event, ×tamp); + md = &evlist->mmap[idx]; + err = perf_mmap__read_init(md, false, &start, &end); + if (err < 0) + return (err == -EAGAIN) ? 0 : -1; + + while ((event = perf_mmap__read_event(md, false, &start, end)) != NULL) { + err = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp); if (err) { - perf_evlist__mmap_consume(kvm->evlist, idx); + perf_mmap__consume(md, false); pr_err("Failed to parse sample\n"); return -1; } @@ -762,7 +770,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx, * FIXME: Here we can't consume the event, as perf_session__queue_event will * point to it, and it'll get possibly overwritten by the kernel. */ - perf_evlist__mmap_consume(kvm->evlist, idx); + perf_mmap__consume(md, false); if (err) { pr_err("Failed to enqueue sample: %d\n", err); @@ -779,6 +787,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx, break; } + perf_mmap__read_done(md); return n; } |