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perf report: Auto-detect branch stack sampling mode

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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>
This commit is contained in:
Stephane Eranian
2012-03-08 23:47:47 +01:00
committed by Ingo Molnar
parent 330aa675b4
commit 993ac88d58
4 changed files with 41 additions and 20 deletions
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2
tools/perf/util/sort.c
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@@ -8,7 +8,7 @@ const char default_sort_order[] = "comm,dso,symbol";
const char *sort_order = default_sort_order;
int sort__need_collapse = 0;
int sort__has_parent = 0;
bool sort__branch_mode;
int sort__branch_mode = -1; /* -1 = means not set */
enum sort_type sort__first_dimension;