160 lines
3.7 KiB
C
160 lines
3.7 KiB
C
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <linux/types.h>
|
|
#include <sys/prctl.h>
|
|
|
|
#include "parse-events.h"
|
|
#include "evlist.h"
|
|
#include "evsel.h"
|
|
#include "thread_map.h"
|
|
#include "cpumap.h"
|
|
#include "tsc.h"
|
|
#include "tests/tests.h"
|
|
|
|
#include "arch-tests.h"
|
|
|
|
#define CHECK__(x) { \
|
|
while ((x) < 0) { \
|
|
pr_debug(#x " failed!\n"); \
|
|
goto out_err; \
|
|
} \
|
|
}
|
|
|
|
#define CHECK_NOT_NULL__(x) { \
|
|
while ((x) == NULL) { \
|
|
pr_debug(#x " failed!\n"); \
|
|
goto out_err; \
|
|
} \
|
|
}
|
|
|
|
/**
|
|
* test__perf_time_to_tsc - test converting perf time to TSC.
|
|
*
|
|
* This function implements a test that checks that the conversion of perf time
|
|
* to and from TSC is consistent with the order of events. If the test passes
|
|
* %0 is returned, otherwise %-1 is returned. If TSC conversion is not
|
|
* supported then then the test passes but " (not supported)" is printed.
|
|
*/
|
|
int test__perf_time_to_tsc(int subtest __maybe_unused)
|
|
{
|
|
struct record_opts opts = {
|
|
.mmap_pages = UINT_MAX,
|
|
.user_freq = UINT_MAX,
|
|
.user_interval = ULLONG_MAX,
|
|
.target = {
|
|
.uses_mmap = true,
|
|
},
|
|
.sample_time = true,
|
|
};
|
|
struct thread_map *threads = NULL;
|
|
struct cpu_map *cpus = NULL;
|
|
struct perf_evlist *evlist = NULL;
|
|
struct perf_evsel *evsel = NULL;
|
|
int err = -1, ret, i;
|
|
const char *comm1, *comm2;
|
|
struct perf_tsc_conversion tc;
|
|
struct perf_event_mmap_page *pc;
|
|
union perf_event *event;
|
|
u64 test_tsc, comm1_tsc, comm2_tsc;
|
|
u64 test_time, comm1_time = 0, comm2_time = 0;
|
|
|
|
threads = thread_map__new(-1, getpid(), UINT_MAX);
|
|
CHECK_NOT_NULL__(threads);
|
|
|
|
cpus = cpu_map__new(NULL);
|
|
CHECK_NOT_NULL__(cpus);
|
|
|
|
evlist = perf_evlist__new();
|
|
CHECK_NOT_NULL__(evlist);
|
|
|
|
perf_evlist__set_maps(evlist, cpus, threads);
|
|
|
|
CHECK__(parse_events(evlist, "cycles:u", NULL));
|
|
|
|
perf_evlist__config(evlist, &opts, NULL);
|
|
|
|
evsel = perf_evlist__first(evlist);
|
|
|
|
evsel->attr.comm = 1;
|
|
evsel->attr.disabled = 1;
|
|
evsel->attr.enable_on_exec = 0;
|
|
|
|
CHECK__(perf_evlist__open(evlist));
|
|
|
|
CHECK__(perf_evlist__mmap(evlist, UINT_MAX, false));
|
|
|
|
pc = evlist->mmap[0].base;
|
|
ret = perf_read_tsc_conversion(pc, &tc);
|
|
if (ret) {
|
|
if (ret == -EOPNOTSUPP) {
|
|
fprintf(stderr, " (not supported)");
|
|
return 0;
|
|
}
|
|
goto out_err;
|
|
}
|
|
|
|
perf_evlist__enable(evlist);
|
|
|
|
comm1 = "Test COMM 1";
|
|
CHECK__(prctl(PR_SET_NAME, (unsigned long)comm1, 0, 0, 0));
|
|
|
|
test_tsc = rdtsc();
|
|
|
|
comm2 = "Test COMM 2";
|
|
CHECK__(prctl(PR_SET_NAME, (unsigned long)comm2, 0, 0, 0));
|
|
|
|
perf_evlist__disable(evlist);
|
|
|
|
for (i = 0; i < evlist->nr_mmaps; i++) {
|
|
while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
|
|
struct perf_sample sample;
|
|
|
|
if (event->header.type != PERF_RECORD_COMM ||
|
|
(pid_t)event->comm.pid != getpid() ||
|
|
(pid_t)event->comm.tid != getpid())
|
|
goto next_event;
|
|
|
|
if (strcmp(event->comm.comm, comm1) == 0) {
|
|
CHECK__(perf_evsel__parse_sample(evsel, event,
|
|
&sample));
|
|
comm1_time = sample.time;
|
|
}
|
|
if (strcmp(event->comm.comm, comm2) == 0) {
|
|
CHECK__(perf_evsel__parse_sample(evsel, event,
|
|
&sample));
|
|
comm2_time = sample.time;
|
|
}
|
|
next_event:
|
|
perf_evlist__mmap_consume(evlist, i);
|
|
}
|
|
}
|
|
|
|
if (!comm1_time || !comm2_time)
|
|
goto out_err;
|
|
|
|
test_time = tsc_to_perf_time(test_tsc, &tc);
|
|
comm1_tsc = perf_time_to_tsc(comm1_time, &tc);
|
|
comm2_tsc = perf_time_to_tsc(comm2_time, &tc);
|
|
|
|
pr_debug("1st event perf time %"PRIu64" tsc %"PRIu64"\n",
|
|
comm1_time, comm1_tsc);
|
|
pr_debug("rdtsc time %"PRIu64" tsc %"PRIu64"\n",
|
|
test_time, test_tsc);
|
|
pr_debug("2nd event perf time %"PRIu64" tsc %"PRIu64"\n",
|
|
comm2_time, comm2_tsc);
|
|
|
|
if (test_time <= comm1_time ||
|
|
test_time >= comm2_time)
|
|
goto out_err;
|
|
|
|
if (test_tsc <= comm1_tsc ||
|
|
test_tsc >= comm2_tsc)
|
|
goto out_err;
|
|
|
|
err = 0;
|
|
|
|
out_err:
|
|
perf_evlist__delete(evlist);
|
|
return err;
|
|
}
|