From 476b3a865f8a3734f74cf659cfa510856a105b1a Mon Sep 17 00:00:00 2001 From: Dongsheng Yang Date: Mon, 9 Dec 2013 18:47:03 -0500 Subject: perf kvm: Fix bug in 'stat report' When we use perf kvm record-report, there is a bug in report subcommand. Example: # perf kvm stat record -a sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.678 MB perf.data.guest (~29641 samples) ] # perf kvm stat report failed to open perf.data: No such file or directory (try 'perf record' first) Initializing perf session failed This bug was introduced by f5fc14124. + struct perf_data_file file = { + .path = input_name, + .mode = PERF_DATA_MODE_READ, + }; kvm->tool = eops; - kvm->session = perf_session__new(kvm->file_name, O_RDONLY, 0, false, - &kvm->tool); + kvm->session = perf_session__new(&file, false, &kvm->tool); It changed the path from kvm->file_name to input_name, this patch change the path back to 'kvm->file_name', then it works well. Verification: # perf kvm stat record -a sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.807 MB perf.data.guest (~35264 samples) ] # perf kvm stat report Analyze events for all VCPUs: VM-EXIT Samples Samples% Time% Min Time Max Time Avg time EPT_VIOLATION 200 32.79% 1.25% 0us 12064us 62.35us ( +- 96.74% ) EPT_MISCONFIG 134 21.97% 0.21% 0us 35us 15.25us ( +- 4.14% ) EXCEPTION_NMI 96 15.74% 0.02% 0us 11us 1.95us ( +- 9.81% ) APIC_ACCESS 79 12.95% 0.02% 0us 13us 2.94us ( +- 11.20% ) HLT 65 10.66% 98.47% 0us 16706us 15084.86us ( +- 1.89% ) IO_INSTRUCTION 27 4.43% 0.02% 0us 29us 6.42us ( +- 15.53% ) EXTERNAL_INTERRUPT 5 0.82% 0.01% 0us 77us 23.65us ( +- 57.90% ) TPR_BELOW_THRESHOLD 4 0.66% 0.00% 0us 1us 1.22us ( +- 4.36% ) Total Samples:610, Total events handled time:995745.54us. Signed-off-by: Dongsheng Yang Link: http://lkml.kernel.org/r/1386632823-17539-1-git-send-email-yangds.fnst@cn.fujitsu.com Signed-off-by: Arnaldo Carvalho de Melo diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c index d9cc0e3..c2e5d56 100644 --- a/tools/perf/builtin-kvm.c +++ b/tools/perf/builtin-kvm.c @@ -1232,7 +1232,7 @@ static int read_events(struct perf_kvm_stat *kvm) .ordered_samples = true, }; struct perf_data_file file = { - .path = input_name, + .path = kvm->file_name, .mode = PERF_DATA_MODE_READ, }; -- cgit v0.10.2