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https://github.com/edk2-porting/linux-next.git
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c20ab37ef3
Callchains output may become a burden on a trace because even
rarely hit site are exposed. This can be too much information.
Let the user set a threshold as a minimum percent of hits using
the new pattern for the -c option:
-c mode,min_percent
Example:
$ perf report -s sym -c flat,4
8.25% [k] copy_user_generic_string
4.19%
copy_user_generic_string
generic_file_aio_read
do_sync_read
vfs_read
sys_pread64
system_call_fastpath
pread64
5.39% [k] search_by_key
4.63% 0x00000000009e0a
2.36% [k] memcpy_c
[...]
$ perf report -s sym -c graph,2
8.25% [k] copy_user_generic_string
|
|--4.31%-- generic_file_aio_read
| do_sync_read
| vfs_read
| |
| --4.19%-- sys_pread64
| system_call_fastpath
| pread64
|
--3.24%-- generic_file_buffered_write
__generic_file_aio_write_nolock
generic_file_aio_write
do_sync_write
reiserfs_file_write
vfs_write
|
--3.14%-- sys_pwrite64
system_call_fastpath
__pwrite64
5.39% [k] search_by_key
|
--2.23%-- reiserfs_update_sd_size
4.63% 0x00000000009e0a
2.36% [k] memcpy_c
[...]
You can also omit it and it will default to 0.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1246558475-10624-1-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
|
||
|---|---|---|
| .. | ||
| include | ||
| abspath.c | ||
| alias.c | ||
| cache.h | ||
| callchain.c | ||
| callchain.h | ||
| color.c | ||
| color.h | ||
| config.c | ||
| ctype.c | ||
| environment.c | ||
| exec_cmd.c | ||
| exec_cmd.h | ||
| generate-cmdlist.sh | ||
| header.c | ||
| header.h | ||
| help.c | ||
| help.h | ||
| levenshtein.c | ||
| levenshtein.h | ||
| module.c | ||
| module.h | ||
| pager.c | ||
| parse-events.c | ||
| parse-events.h | ||
| parse-options.c | ||
| parse-options.h | ||
| path.c | ||
| PERF-VERSION-GEN | ||
| quote.c | ||
| quote.h | ||
| run-command.c | ||
| run-command.h | ||
| sigchain.c | ||
| sigchain.h | ||
| strbuf.c | ||
| strbuf.h | ||
| string.c | ||
| string.h | ||
| strlist.c | ||
| strlist.h | ||
| symbol.c | ||
| symbol.h | ||
| types.h | ||
| usage.c | ||
| util.h | ||
| wrapper.c | ||