diff options
| author | Frederic Weisbecker <fweisbec@gmail.com> | 2009-11-23 15:42:35 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-23 18:18:31 +0100 |
| commit | 1b290d670ffa883b7e062177463a8efd00eaa2c1 (patch) | |
| tree | d6449227ae19be6fb9046ac5d12cc3ae9d252972 /tools/perf/util/symbol.c | |
| parent | f5ffe02e5046003ae7e2ce70d3d1c2a73331268b (diff) | |
perf tools: Add support for breakpoint events in perf tools
Add the breakpoint events support with this new sysnopsis:
mem:addr[:access]
Where addr is a raw addr value in the kernel and access can be
either [r][w][x]
Example to profile tasklist_lock:
$ grep tasklist_lock /proc/kallsyms
ffffffff8189c000 D tasklist_lock
$ perf record -e mem:0xffffffff8189c000:rw -a -f -c 1
$ perf report
# Samples: 62
#
# Overhead Command Shared Object Symbol
# ........ ............... ............. ......
#
29.03% swapper [kernel] [k] _raw_read_trylock
29.03% swapper [kernel] [k] _raw_read_unlock
19.35% init [kernel] [k] _raw_read_trylock
19.35% init [kernel] [k] _raw_read_unlock
1.61% events/0 [kernel] [k] _raw_read_trylock
1.61% events/0 [kernel] [k] _raw_read_unlock
Coming soon:
- Support for symbols in the event definition.
- Default period to 1 for breakpoint events because these are
not high frequency events. The same thing is needed for trace
events.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Prasad <prasad@linux.vnet.ibm.com>
LKML-Reference: <1258987355-8751-4-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Prasad <prasad@linux.vnet.ibm.com>
Diffstat (limited to 'tools/perf/util/symbol.c')
0 files changed, 0 insertions, 0 deletions