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Frederic Weisbecker 9a92b479b2 perf tools: Improve thread comm resolution in perf sched 
When we get sched traces that involve a task that was already
created before opening the event, we won't have the comm event for
it.

So if we can't find the comm event for a given thread, we look at
the traces that may contain these informations.

Before:

 ata/1:371             |      0.000 ms |        1 | avg: 3988.693 ms | max: 3988.693 ms |
 kondemand/1:421       |      0.096 ms |        3 | avg:  345.346 ms | max: 1035.989 ms |
 kondemand/0:420       |      0.025 ms |        3 | avg:  421.332 ms | max:  964.014 ms |
 :5124:5124            |      0.103 ms |        5 | avg:   74.082 ms | max:  277.194 ms |
 :6244:6244            |      0.691 ms |        9 | avg:  125.655 ms | max:  271.306 ms |
 firefox:5080          |      0.924 ms |        5 | avg:   53.833 ms | max:  257.828 ms |
 npviewer.bin:6225     |     21.871 ms |       53 | avg:   22.462 ms | max:  220.835 ms |
 :6245:6245            |      9.631 ms |       21 | avg:   41.864 ms | max:  213.349 ms |

After:

 ata/1:371             |      0.000 ms |        1 | avg: 3988.693 ms | max: 3988.693 ms |
 kondemand/1:421       |      0.096 ms |        3 | avg:  345.346 ms | max: 1035.989 ms |
 kondemand/0:420       |      0.025 ms |        3 | avg:  421.332 ms | max:  964.014 ms |
 firefox:5124          |      0.103 ms |        5 | avg:   74.082 ms | max:  277.194 ms |
 npviewer.bin:6244     |      0.691 ms |        9 | avg:  125.655 ms | max:  271.306 ms |
 firefox:5080          |      0.924 ms |        5 | avg:   53.833 ms | max:  257.828 ms |
 npviewer.bin:6225     |     21.871 ms |       53 | avg:   22.462 ms | max:  220.835 ms |
 npviewer.bin:6245     |      9.631 ms |       21 | avg:   41.864 ms | max:  213.349 ms |

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1255012632-7882-1-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
 		2009-10-08 16:56:33 +02:00
..
include perf report: Adjust column width to the values sampled 2009-07-11 10:24:11 +02:00
PERF-VERSION-GEN perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
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: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
callchain.c perf: Enable more compiler warnings 2009-08-16 10:47:47 +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_counter tools: Add and use isprint() 2009-06-18 09:46:00 +02:00
data_map.c perf tools: Unify perf.data mapping and events handling 2009-10-08 16:56:32 +02:00
data_map.h perf tools: Unify perf.data mapping and events handling 2009-10-08 16:56:32 +02:00
debug.c perf tools: Librarize trace_event() helper 2009-08-16 23:06:45 +02:00
debug.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
environment.c perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ 2009-06-06 20:33:43 +02:00
event.h perf tools: Remove show_mask bitmask 2009-10-04 19:37:11 +02:00
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 tools: Merge trace.info content into perf.data 2009-10-07 08:36:10 +02:00
header.h perf tools: Merge trace.info content into perf.data 2009-10-07 08:36:10 +02:00
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 tools: Move hist_entry__add common code to hist.c 2009-10-03 16:01:59 +02:00
hist.h perf tools: Move hist_entry__add common code to hist.c 2009-10-03 16:01:59 +02:00
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 tools: Factorize the map helpers 2009-08-12 12:37:37 +02:00
pager.c perf_counter tools: Remove dead code 2009-06-27 06:06:39 +02:00
parse-events.c perf tools: Dont use openat() 2009-09-24 21:20:08 +02:00
parse-events.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
parse-options.c perf: Enable more compiler warnings 2009-08-16 10:47:47 +02:00
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
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
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 tools: Rewrite and improve support for kernel modules 2009-10-02 10:48:42 +02:00
sort.h perf tools: Rewrite and improve support for kernel modules 2009-10-02 10:48:42 +02:00
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: /proc/modules names don't always match its name 2009-10-05 20:35:23 +02:00
string.h perf tools: /proc/modules names don't always match its name 2009-10-05 20:35:23 +02:00
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: Add a power-only mode 2009-10-01 09:26:40 +02:00
svghelper.h perf tools: Protect header files with a consistent style 2009-09-24 21:27:51 +02:00
symbol.c Merge branch 'perf/urgent' into perf/core 2009-10-06 15:02:34 +02:00
symbol.h perf tools: Create maps for modules when processing kallsyms 2009-10-05 20:35:23 +02:00
thread.c perf tools: Improve thread comm resolution in perf sched 2009-10-08 16:56:33 +02:00
thread.h perf tools: Improve thread comm resolution in perf sched 2009-10-08 16:56:33 +02:00
trace-event-info.c perf tools: Merge trace.info content into perf.data 2009-10-07 08:36:10 +02:00
trace-event-parse.c perf trace: Add string/dynamic cases to format_flags 2009-10-06 15:04:46 +02:00
trace-event-read.c perf tools: Merge trace.info content into perf.data 2009-10-07 08:36:10 +02:00
trace-event.h perf tools: Merge trace.info content into perf.data 2009-10-07 08:36:10 +02:00
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 Merge branch 'perfcounters/tracing' into perfcounters/core 2009-08-31 10:03:27 +02:00
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_counter tools: Add more warnings and fix/annotate them 2009-07-01 12:49:48 +02:00