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| author | Stephane Eranian <eranian@google.com> | 2012-03-08 23:47:47 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2012-03-09 08:26:08 +0100 |
| commit | 993ac88d5892629fbe1f8a54857f9947f49f0d96 (patch) | |
| tree | 27f23cc95a72be350781803530e09b1535b719e7 /tools/perf/Documentation | |
| parent | perf record: Add HEADER_BRANCH_STACK tag (diff) | |
| download | linux-993ac88d5892629fbe1f8a54857f9947f49f0d96.tar.xz linux-993ac88d5892629fbe1f8a54857f9947f49f0d96.zip | |
perf report: Auto-detect branch stack sampling mode
This patch enhances perf report to auto-detect when the
perf.data file contains samples with branch stacks. That way it
is not necessary to use the -b option.
To force branch view mode to off, simply use --no-branch-stack.
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Cc: acme@redhat.com
Cc: asharma@fb.com
Cc: ravitillo@lbl.gov
Cc: vweaver1@eecs.utk.edu
Cc: khandual@linux.vnet.ibm.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/1331246868-19905-4-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-report.txt | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt index 19b9092cf8b7..87feeee8b90c 100644 --- a/tools/perf/Documentation/perf-report.txt +++ b/tools/perf/Documentation/perf-report.txt @@ -157,8 +157,11 @@ OPTIONS --branch-stack:: Use the addresses of sampled taken branches instead of the instruction address to build the histograms. To generate meaningful output, the - perf.data file must have been obtained using perf record -b xxx where - xxx is a branch filter option. + perf.data file must have been obtained using perf record -b or + perf record --branch-filter xxx where xxx is a branch filter option. + perf report is able to auto-detect whether a perf.data file contains + branch stacks and it will automatically switch to the branch view mode, + unless --no-branch-stack is used. SEE ALSO -------- |