Arnaldo Carvalho de Melo 86a9eee047 perf diff: Introduce tool to show performance difference ... I guess it is enough to show some examples: [root@doppio linux-2.6-tip]# rm -f perf.data* [root@doppio linux-2.6-tip]# ls -la perf.data* ls: cannot access perf.data*: No such file or directory [root@doppio linux-2.6-tip]# perf record -f find / > /dev/null [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.062 MB perf.data (~2699 samples) ] [root@doppio linux-2.6-tip]# ls -la perf.data* -rw------- 1 root root 74440 2009-12-14 20:03 perf.data [root@doppio linux-2.6-tip]# perf record -f find / > /dev/null [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.062 MB perf.data (~2692 samples) ] [root@doppio linux-2.6-tip]# ls -la perf.data* -rw------- 1 root root 74280 2009-12-14 20:03 perf.data -rw------- 1 root root 74440 2009-12-14 20:03 perf.data.old [root@doppio linux-2.6-tip]# perf diff | head -5 1 -34994580 /lib64/libc-2.10.1.so _IO_vfprintf_internal 2 -15307806 [kernel.kallsyms] __kmalloc 3 +1 +3665941 /lib64/libc-2.10.1.so __GI_memmove 4 +4 +23508995 /lib64/libc-2.10.1.so _int_malloc 5 +7 +38538813 [kernel.kallsyms] __d_lookup [root@doppio linux-2.6-tip]# perf diff -p | head -5 1 +1.00% /lib64/libc-2.10.1.so _IO_vfprintf_internal 2 [kernel.kallsyms] __kmalloc 3 +1 /lib64/libc-2.10.1.so __GI_memmove 4 +4 /lib64/libc-2.10.1.so _int_malloc 5 +7 -1.00% [kernel.kallsyms] __d_lookup [root@doppio linux-2.6-tip]# perf diff -v | head -5 1 361449551 326454971 -34994580 /lib64/libc-2.10.1.so _IO_vfprintf_internal 2 151009241 135701435 -15307806 [kernel.kallsyms] __kmalloc 3 +1 101805328 105471269 +3665941 /lib64/libc-2.10.1.so __GI_memmove 4 +4 78041440 101550435 +23508995 /lib64/libc-2.10.1.so _int_malloc 5 +7 59536172 98074985 +38538813 [kernel.kallsyms] __d_lookup [root@doppio linux-2.6-tip]# perf diff -vp | head -5 1 9.00% 8.00% +1.00% /lib64/libc-2.10.1.so _IO_vfprintf_internal 2 3.00% 3.00% [kernel.kallsyms] __kmalloc 3 +1 2.00% 2.00% /lib64/libc-2.10.1.so __GI_memmove 4 +4 2.00% 2.00% /lib64/libc-2.10.1.so _int_malloc 5 +7 1.00% 2.00% -1.00% [kernel.kallsyms] __d_lookup [root@doppio linux-2.6-tip]# This should be enough for diffs where the system is non volatile, i.e. when one doesn't updates binaries. For volatile environments, stay tuned for the next perf tool feature: a buildid cache populated by 'perf record', managed by 'perf buildid-cache' a-la ccache, and used by all the report tools. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Stephen Hemminger <shemminger@vyatta.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> LKML-Reference: <1260828571-3613-3-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2009-12-15 08:50:29 +01:00
..
include	perf symbols: Simplify symbol machinery setup	2009-11-24 16:37:02 +01:00
abspath.c	perf: Enable more compiler warnings	2009-08-16 10:47:47 +02:00
alias.c	perf_counter tools: Add more warnings and fix/annotate them	2009-07-01 12:49:48 +02:00
cache.h	perf tools: Do not manually count string lengths	2009-10-13 11:55:31 +02:00
callchain.c	perf tools: Unify debug messages mechanisms	2009-10-23 08:22:47 +02:00
callchain.h	perf tools: Protect header files with a consistent style	2009-09-24 21:27:51 +02:00
color.c	perf tools: Librarize trace_event() helper	2009-08-16 23:06:45 +02:00
color.h	perf tools: Protect header files with a consistent style	2009-09-24 21:27:51 +02:00
config.c	perf: Enable more compiler warnings	2009-08-16 10:47:47 +02:00
ctype.c	perf tools: Move graph_line and graph_dotted_line from top	2009-11-23 21:55:20 +01:00
data_map.c	perf session: Adopt the sample_type variable	2009-12-14 17:34:56 +01:00
debug.c	perf tools: Unify debug messages mechanisms	2009-10-23 08:22:47 +02:00
debug.h	perf tools: Debug.h needs to include event.h for event_t	2009-11-16 22:05:50 +01:00
debugfs.c	perf tools: Add debugfs utility routines for perf	2009-11-08 18:01:34 +01:00
debugfs.h	perf tools: Add debugfs utility routines for perf	2009-11-08 18:01:34 +01:00
environment.c	perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/	2009-06-06 20:33:43 +02:00
event.c	perf session: Event statistics also are per session	2009-12-15 08:50:28 +01:00
event.h	perf session: Event statistics also are per session	2009-12-15 08:50:28 +01:00
exec_cmd.c	perf: Enable more compiler warnings	2009-08-16 10:47:47 +02:00
exec_cmd.h	perf tools: Protect header files with a consistent style	2009-09-24 21:27:51 +02:00
generate-cmdlist.sh	perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/	2009-06-06 20:33:43 +02:00
header.c	perf session: Ditch register_perf_file_handler	2009-12-14 16:57:15 +01:00
header.h	perf tools: Introduce perf_session class	2009-12-12 07:42:12 +01:00
help.c	perf_counter tools: Add more warnings and fix/annotate them	2009-07-01 12:49:48 +02:00
help.h	perf tools: Protect header files with a consistent style	2009-09-24 21:27:51 +02:00
hist.c	perf session: Move the hist_entries rb tree to perf_session	2009-12-14 16:57:18 +01:00
hist.h	perf session: Move the hist_entries rb tree to perf_session	2009-12-14 16:57:18 +01:00
levenshtein.c	perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/	2009-06-06 20:33:43 +02:00
levenshtein.h	perf tools: Protect header files with a consistent style	2009-09-24 21:27:51 +02:00
map.c	perf session: Move kmaps to perf_session	2009-12-14 16:57:17 +01:00
pager.c	perf_counter tools: Remove dead code	2009-06-27 06:06:39 +02:00
parse-events.c	perf tools: Optimize parse_subsystem_tracepoint_event()	2009-12-07 08:09:29 +01:00
parse-events.h	perf trace: Add filter Suppport	2009-10-15 11:35:23 +02:00
parse-options.c	perf tools: Align long options which have no short forms	2009-12-10 08:30:28 +01:00
parse-options.h	perf tools: Protect header files with a consistent style	2009-09-24 21:27:51 +02:00
path.c	perf: Enable more compiler warnings	2009-08-16 10:47:47 +02:00
PERF-VERSION-GEN	perf tools: Bump version to 0.0.2	2009-10-16 10:34:28 +02:00
probe-event.c	perf tools: Correct size given to memset	2009-12-10 08:30:26 +01:00
probe-event.h	perf probe: Support --del option	2009-12-09 07:26:53 +01:00
probe-finder.c	perf probe: Fix strtailcmp() to compare s1and s2[0]	2009-12-07 18:33:20 +01:00
probe-finder.h	perf/probes: Support function entry relative line number	2009-10-29 08:47:49 +01:00
quote.c	perf: Fix read buffer overflow	2009-08-04 11:09:56 +02:00
quote.h	perf tools: Protect header files with a consistent style	2009-09-24 21:27:51 +02:00
run-command.c	perf: Enable more compiler warnings	2009-08-16 10:47:47 +02:00
run-command.h	perf tools: Protect header files with a consistent style	2009-09-24 21:27:51 +02:00
session.c	perf session: Adopt resolve_callchain	2009-12-14 17:34:55 +01:00
session.h	perf session: Event statistics also are per session	2009-12-15 08:50:28 +01:00
sigchain.c	perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/	2009-06-06 20:33:43 +02:00
sigchain.h	perf tools: Protect header files with a consistent style	2009-09-24 21:27:51 +02:00
sort.c	perf util: Remove setup_sorting dups	2009-12-15 08:50:28 +01:00
sort.h	perf diff: Introduce tool to show performance difference	2009-12-15 08:50:29 +01:00
strbuf.c	perf_counter tools: Add more warnings and fix/annotate them	2009-07-01 12:49:48 +02:00
strbuf.h	perf tools: Protect header files with a consistent style	2009-09-24 21:27:51 +02:00
string.c	perf tools: Fix _GNU_SOURCE macro related strndup() build error	2009-12-02 09:24:56 +01:00
string.h	perf probe: Add argv_split() from lib/argv_split.c	2009-12-01 08:20:02 +01:00
strlist.c	strlist: Introduce strlist__entry and strlist__nr_entries methods	2009-07-11 19:20:25 +02:00
strlist.h	perf tools: Protect header files with a consistent style	2009-09-24 21:27:51 +02:00
svghelper.c	perf timechart: Improve the visual appearance of scheduler delays	2009-10-20 03:39:21 +02:00
svghelper.h	perf tools: Protect header files with a consistent style	2009-09-24 21:27:51 +02:00
symbol.c	perf session: Move kmaps to perf_session	2009-12-14 16:57:17 +01:00
symbol.h	perf session: Move kmaps to perf_session	2009-12-14 16:57:17 +01:00
thread.c	perf session: Move kmaps to perf_session	2009-12-14 16:57:17 +01:00
thread.h	perf session: Move kmaps to perf_session	2009-12-14 16:57:17 +01:00
trace-event-info.c	perf trace: Read_tracing_data should die() another day	2009-11-21 17:45:59 +01:00
trace-event-parse.c	perf tools: Correct size given to memset	2009-12-10 08:30:26 +01:00
trace-event-perl.c	perf trace/scripting: Don't display 'scripting unsupported' msg unnecessarily	2009-12-07 08:05:07 +01:00
trace-event-perl.h	perf trace/scripting: Fix compile error when libperl not installed	2009-12-07 06:31:37 +01:00
trace-event-read.c	perf tools: Misc small fixes	2009-12-06 18:15:02 +01:00
trace-event.h	perf trace: Add interface to access perf data from Perl handlers	2009-11-28 10:04:27 +01:00
types.h	perf tools: Protect header files with a consistent style	2009-09-24 21:27:51 +02:00
usage.c	perf top: Fall back to cpu-clock-tick hrtimer sampling if no cycle counter available	2009-06-07 17:31:52 +02:00
util.h	perf tools: Remove unused wrapper routines	2009-11-24 16:37:03 +01:00
values.c	perf: Enable more compiler warnings	2009-08-16 10:47:47 +02:00
values.h	perf tools: Protect header files with a consistent style	2009-09-24 21:27:51 +02:00
wrapper.c	perf tools: Remove unused wrapper routines	2009-11-24 16:37:03 +01:00