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author | Jiri Olsa <jolsa@redhat.com> | 2012-10-31 15:52:47 +0100 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-10-31 16:20:58 -0200 |
commit | 52502bf201a85b5b51a384037a002d0b39093df0 (patch) | |
tree | c4d2bcbc4c1f7c10693b132ad70951c06c2cee86 /tools/perf/perf.h | |
parent | 945aea220bb8f4bb37950549cc0b93bbec24c460 (diff) | |
download | linux-52502bf201a85b5b51a384037a002d0b39093df0.tar.gz linux-52502bf201a85b5b51a384037a002d0b39093df0.tar.bz2 linux-52502bf201a85b5b51a384037a002d0b39093df0.zip |
perf tests: Add framework for automated perf_event_attr tests
The idea is run perf session with kidnapping sys_perf_event_open
function. For each sys_perf_event_open call we store the perf_event_attr
data to the file to be checked later against what we expect.
You can run this by:
$ python ./tests/attr.py -d ./tests/attr/ -p ./perf -v
v2 changes:
- preserve errno value in the hook
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20121031145247.GB1027@krava.brq.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/perf.h')
-rw-r--r-- | tools/perf/perf.h | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/tools/perf/perf.h b/tools/perf/perf.h index 469fbf2daea4..00472646b3bf 100644 --- a/tools/perf/perf.h +++ b/tools/perf/perf.h @@ -174,13 +174,25 @@ static inline unsigned long long rdclock(void) (void) (&_min1 == &_min2); \ _min1 < _min2 ? _min1 : _min2; }) +extern bool test_attr__enabled; +void test_attr__init(void); +void test_attr__open(struct perf_event_attr *attr, pid_t pid, int cpu, + int fd, int group_fd, unsigned long flags); + static inline int sys_perf_event_open(struct perf_event_attr *attr, pid_t pid, int cpu, int group_fd, unsigned long flags) { - return syscall(__NR_perf_event_open, attr, pid, cpu, - group_fd, flags); + int fd; + + fd = syscall(__NR_perf_event_open, attr, pid, cpu, + group_fd, flags); + + if (unlikely(test_attr__enabled)) + test_attr__open(attr, pid, cpu, fd, group_fd, flags); + + return fd; } #define MAX_COUNTERS 256 |