linux/tools/perf/tests/open-syscall-tp-fields.c
Arnaldo Carvalho de Melo 509051ea84 perf record: Rename --no-delay to --no-buffering
That is how the option summary describes it and so that we can free
--delay to replace --initial-delay and then be consistent with stat's
--delay equivalent option.

Suggested-by: Ingo Molnar <mingo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-f8hd2010uhjl2zzb34hepbmi@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-01-14 17:57:04 -03:00

118 lines
2.4 KiB
C

#include "perf.h"
#include "evlist.h"
#include "evsel.h"
#include "thread_map.h"
#include "tests.h"
int test__syscall_open_tp_fields(void)
{
struct record_opts opts = {
.target = {
.uid = UINT_MAX,
.uses_mmap = true,
},
.no_buffering = true,
.freq = 1,
.mmap_pages = 256,
.raw_samples = true,
};
const char *filename = "/etc/passwd";
int flags = O_RDONLY | O_DIRECTORY;
struct perf_evlist *evlist = perf_evlist__new();
struct perf_evsel *evsel;
int err = -1, i, nr_events = 0, nr_polls = 0;
if (evlist == NULL) {
pr_debug("%s: perf_evlist__new\n", __func__);
goto out;
}
evsel = perf_evsel__newtp("syscalls", "sys_enter_open");
if (evsel == NULL) {
pr_debug("%s: perf_evsel__newtp\n", __func__);
goto out_delete_evlist;
}
perf_evlist__add(evlist, evsel);
err = perf_evlist__create_maps(evlist, &opts.target);
if (err < 0) {
pr_debug("%s: perf_evlist__create_maps\n", __func__);
goto out_delete_evlist;
}
perf_evsel__config(evsel, &opts);
evlist->threads->map[0] = getpid();
err = perf_evlist__open(evlist);
if (err < 0) {
pr_debug("perf_evlist__open: %s\n", strerror(errno));
goto out_delete_evlist;
}
err = perf_evlist__mmap(evlist, UINT_MAX, false);
if (err < 0) {
pr_debug("perf_evlist__mmap: %s\n", strerror(errno));
goto out_delete_evlist;
}
perf_evlist__enable(evlist);
/*
* Generate the event:
*/
open(filename, flags);
while (1) {
int before = nr_events;
for (i = 0; i < evlist->nr_mmaps; i++) {
union perf_event *event;
while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
const u32 type = event->header.type;
int tp_flags;
struct perf_sample sample;
++nr_events;
if (type != PERF_RECORD_SAMPLE) {
perf_evlist__mmap_consume(evlist, i);
continue;
}
err = perf_evsel__parse_sample(evsel, event, &sample);
if (err) {
pr_err("Can't parse sample, err = %d\n", err);
goto out_delete_evlist;
}
tp_flags = perf_evsel__intval(evsel, &sample, "flags");
if (flags != tp_flags) {
pr_debug("%s: Expected flags=%#x, got %#x\n",
__func__, flags, tp_flags);
goto out_delete_evlist;
}
goto out_ok;
}
}
if (nr_events == before)
poll(evlist->pollfd, evlist->nr_fds, 10);
if (++nr_polls > 5) {
pr_debug("%s: no events!\n", __func__);
goto out_delete_evlist;
}
}
out_ok:
err = 0;
out_delete_evlist:
perf_evlist__delete(evlist);
out:
return err;
}