Frederic Weisbecker c20ab37ef3 perf_counter tools: Set the minimum percent for callchains to be displayed ... 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>		2009-07-02 21:38:37 +02:00
..
perf	perf_counter tools: Set the minimum percent for callchains to be displayed	2009-07-02 21:38:37 +02:00