diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2009-06-30 19:01:22 -0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-07-01 00:07:10 +0200 |
| commit | 7bec7a9134c25cecb0d7029199b59f7b1bef35b8 (patch) | |
| tree | ea28eb245e00b837e77e5919dfb1acc070ca76af /tools/perf/Documentation | |
| parent | cc8b88b15ab8e5ae162a46c4b6b286b555190dd1 (diff) | |
| download | op-kernel-dev-7bec7a9134c25cecb0d7029199b59f7b1bef35b8.zip op-kernel-dev-7bec7a9134c25cecb0d7029199b59f7b1bef35b8.tar.gz | |
perf report: Add --symbols parameter
So that we can filter by symbol name.
The 'pfunct' utility in the 'dwarves' package can be used to
create a file with the functions one wants.
Example:
[acme@doppio pahole]$ pfunct /usr/lib/debug/usr/lib64/libdw-0.141.so.debug | grep dwarf > /tmp/dwarf.symbols
[acme@doppio pahole]$ wc -l /tmp/dwarf.symbols
93 /tmp/dwarf.symbols
[acme@doppio pahole]$ head -3 /tmp/dwarf.symbols
dwfl_addrdwarf
dwfl_module_getdwarf
dwfl_getdwarf
[acme@doppio pahole]$ perf report --sort comm,dso,symbol --comms pahole --dsos /usr/lib64/libdw-0.141.so --symbols file:///tmp/dwarf.symbols
33.99% pahole /usr/lib64/libdw-0.141.so [.] dwarf_tag
29.07% pahole /usr/lib64/libdw-0.141.so [.] dwarf_decl_file
27.71% pahole /usr/lib64/libdw-0.141.so [.] dwarf_getsrclines
4.54% pahole /usr/lib64/libdw-0.141.so 0x00000000007400
3.93% pahole /usr/lib64/libdw-0.141.so [.] dwarf_decl_line
0.46% pahole /usr/lib64/libdw-0.141.so [.] dwarf_getlocation
0.18% pahole /usr/lib64/libdw-0.141.so [.] __libdwarf_next_prime
0.13% pahole /usr/lib64/libdw-0.141.so [.] dwarf_diecu
[acme@doppio pahole]$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1246399282-20934-4-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-report.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt index 4c44ef1..8aa3f8c 100644 --- a/tools/perf/Documentation/perf-report.txt +++ b/tools/perf/Documentation/perf-report.txt @@ -28,6 +28,10 @@ OPTIONS --comms=:: Only consider symbols in these comms. CSV that understands file://filename entries. +-S:: +--symbols=:: + Only consider these symbols. CSV that understands + file://filename entries. SEE ALSO -------- |
