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| author |   Stephane Eranian <eranian@google.com> | 2012-03-08 23:47:46 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2012-03-09 08:26:08 +0100 |
| commit | 330aa675b4f92a422cb6d3acbbfd16a628017520 (patch) | |
| tree | b1feef795c8de616b31e8a0683c7c0e7498d2d33 /tools/perf/builtin-record.c | |
| parent | perf record: Provide default branch stack sampling mode option (diff) | |
| download | linux-dev-330aa675b4f92a422cb6d3acbbfd16a628017520.tar.xz linux-dev-330aa675b4f92a422cb6d3acbbfd16a628017520.zip | |
perf record: Add HEADER_BRANCH_STACK tag
This patch adds a new feature bit, namely,
HEADER_BRANCH_STACK. When present, it indicates
that sample records may contain branch stack.
This could be useful to a viewer to switch to
branch mode without having to parse all the
samples or without a specific cmdline option.
This will be used in a subsequent patch to
enhance perf report with branch stacks.
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/1331246868-19905-3-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/builtin-record.c')
| -rw-r--r-- | tools/perf/builtin-record.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index a7c53a9ef372..be4e1eee782e 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -473,6 +473,9 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv) if (!have_tracepoints(&evsel_list->entries)) perf_header__clear_feat(&session->header, HEADER_TRACE_INFO); + if (!rec->opts.branch_stack) + perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); + if (!rec->file_new) { err = perf_session__read_header(session, output); if (err < 0) |