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| author | Ingo Molnar <mingo@elte.hu> | 2009-06-14 13:04:15 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-14 18:34:06 (GMT) |
| commit | 3efa1cc99ec51bc7a7ae0011a16619fd20dbe6ea (patch) | |
| tree | db39c3b638bdaaf65382147c55a6cb60b12b9cbd /arch/x86/kernel/cpu/perf_counter.c | |
| parent | 8465b05046652cfde3d47692cab2e8ba962f140f (diff) | |
| download | linux-fsl-qoriq-3efa1cc99ec51bc7a7ae0011a16619fd20dbe6ea.tar.xz | |
perf record/report: Add call graph / call chain profiling
Add the first steps of call-graph profiling:
- add the -c (--call-graph) option to perf record
- parse the call-graph record and printout out under -D (--dump-trace)
The call-graph data is not put into the histogram yet, but it
can be seen that it's being processed correctly:
0x3ce0 [0x38]: event: 35
.
. ... raw event: size 56 bytes
. 0000: 23 00 00 00 05 00 38 00 d4 df 0e 81 ff ff ff ff #.....8........
. 0010: 60 0b 00 00 60 0b 00 00 03 00 00 00 01 00 02 00 `...`..........
. 0020: d4 df 0e 81 ff ff ff ff a0 61 ed 41 36 00 00 00 .........a.A6..
. 0030: 04 92 e6 41 36 00 00 00 .a.A6..
.
0x3ce0 [0x38]: PERF_EVENT (IP, 5): 2912: 0xffffffff810edfd4 period: 1
... chain: u:2, k:1, nr:3
..... 0: 0xffffffff810edfd4
..... 1: 0x3641ed61a0
..... 2: 0x3641e69204
... thread: perf:2912
...... dso: [kernel]
This shows a 3-entry call-graph: with 1 kernel-space and two user-space
entries
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/cpu/perf_counter.c')
0 files changed, 0 insertions, 0 deletions