diff options
author | Wang Nan <wangnan0@huawei.com> | 2016-02-22 09:10:36 +0000 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-02-22 13:02:44 -0300 |
commit | 95088a591e197610bd03f4059f5fdbe9e376425b (patch) | |
tree | b48f2529838b72d00d2caba00bb0cfbf0bddd790 /tools/perf/tests | |
parent | e571e029bdbf59f485fe67740b7a4ef421e1d55d (diff) | |
download | linux-95088a591e197610bd03f4059f5fdbe9e376425b.tar.bz2 |
perf tools: Apply tracepoint event definition options to BPF script
Users can pass options to tracepoints defined in the BPF script. For
example:
# perf record -e ./test.c/no-inherit/ bash
# dd if=/dev/zero of=/dev/null count=10000
# exit
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.022 MB perf.data (139 samples) ]
(no-inherit works, only the sys_read issued by bash are captured, at
least 10000 sys_read issued by dd are skipped.)
test.c:
#define SEC(NAME) __attribute__((section(NAME), used))
SEC("func=sys_read")
int bpf_func__sys_read(void *ctx)
{
return 1;
}
char _license[] SEC("license") = "GPL";
int _version SEC("version") = LINUX_VERSION_CODE;
no-inherit is applied to the kprobe event defined in test.c.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Cody P Schafer <dev@codyps.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jeremie Galarneau <jeremie.galarneau@efficios.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kirill Smelkov <kirr@nexedi.com>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1456132275-98875-10-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/tests')
-rw-r--r-- | tools/perf/tests/bpf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c index 4aed5cb4ac2d..199501c71e27 100644 --- a/tools/perf/tests/bpf.c +++ b/tools/perf/tests/bpf.c @@ -112,7 +112,7 @@ static int do_test(struct bpf_object *obj, int (*func)(void), parse_evlist.error = &parse_error; INIT_LIST_HEAD(&parse_evlist.list); - err = parse_events_load_bpf_obj(&parse_evlist, &parse_evlist.list, obj); + err = parse_events_load_bpf_obj(&parse_evlist, &parse_evlist.list, obj, NULL); if (err || list_empty(&parse_evlist.list)) { pr_debug("Failed to add events selected by BPF\n"); return TEST_FAIL; |