mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-19 10:44:14 +08:00
81f17c90f1
This way we'll be able to pass more test specific parameters without having to change this function signature. Will be used by the upcoming 'shell tests', shell scripts that will call perf tools and check if they work as expected, comparing its effects on the system (think 'perf probe foo') the output produced, etc. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Thomas Richter <tmricht@linux.vnet.ibm.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-wq250w7j1opbzyiynozuajbl@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
125 lines
3.2 KiB
C
125 lines
3.2 KiB
C
#include <errno.h>
|
|
#include <inttypes.h>
|
|
/* For the CPU_* macros */
|
|
#include <pthread.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <api/fs/fs.h>
|
|
#include <linux/err.h>
|
|
#include <api/fs/tracing_path.h>
|
|
#include "evsel.h"
|
|
#include "tests.h"
|
|
#include "thread_map.h"
|
|
#include "cpumap.h"
|
|
#include "debug.h"
|
|
#include "stat.h"
|
|
|
|
int test__openat_syscall_event_on_all_cpus(struct test *test __maybe_unused, int subtest __maybe_unused)
|
|
{
|
|
int err = -1, fd, cpu;
|
|
struct cpu_map *cpus;
|
|
struct perf_evsel *evsel;
|
|
unsigned int nr_openat_calls = 111, i;
|
|
cpu_set_t cpu_set;
|
|
struct thread_map *threads = thread_map__new(-1, getpid(), UINT_MAX);
|
|
char sbuf[STRERR_BUFSIZE];
|
|
char errbuf[BUFSIZ];
|
|
|
|
if (threads == NULL) {
|
|
pr_debug("thread_map__new\n");
|
|
return -1;
|
|
}
|
|
|
|
cpus = cpu_map__new(NULL);
|
|
if (cpus == NULL) {
|
|
pr_debug("cpu_map__new\n");
|
|
goto out_thread_map_delete;
|
|
}
|
|
|
|
CPU_ZERO(&cpu_set);
|
|
|
|
evsel = perf_evsel__newtp("syscalls", "sys_enter_openat");
|
|
if (IS_ERR(evsel)) {
|
|
tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "syscalls", "sys_enter_openat");
|
|
pr_debug("%s\n", errbuf);
|
|
goto out_thread_map_delete;
|
|
}
|
|
|
|
if (perf_evsel__open(evsel, cpus, threads) < 0) {
|
|
pr_debug("failed to open counter: %s, "
|
|
"tweak /proc/sys/kernel/perf_event_paranoid?\n",
|
|
str_error_r(errno, sbuf, sizeof(sbuf)));
|
|
goto out_evsel_delete;
|
|
}
|
|
|
|
for (cpu = 0; cpu < cpus->nr; ++cpu) {
|
|
unsigned int ncalls = nr_openat_calls + cpu;
|
|
/*
|
|
* XXX eventually lift this restriction in a way that
|
|
* keeps perf building on older glibc installations
|
|
* without CPU_ALLOC. 1024 cpus in 2010 still seems
|
|
* a reasonable upper limit tho :-)
|
|
*/
|
|
if (cpus->map[cpu] >= CPU_SETSIZE) {
|
|
pr_debug("Ignoring CPU %d\n", cpus->map[cpu]);
|
|
continue;
|
|
}
|
|
|
|
CPU_SET(cpus->map[cpu], &cpu_set);
|
|
if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
|
|
pr_debug("sched_setaffinity() failed on CPU %d: %s ",
|
|
cpus->map[cpu],
|
|
str_error_r(errno, sbuf, sizeof(sbuf)));
|
|
goto out_close_fd;
|
|
}
|
|
for (i = 0; i < ncalls; ++i) {
|
|
fd = openat(0, "/etc/passwd", O_RDONLY);
|
|
close(fd);
|
|
}
|
|
CPU_CLR(cpus->map[cpu], &cpu_set);
|
|
}
|
|
|
|
/*
|
|
* Here we need to explicitly preallocate the counts, as if
|
|
* we use the auto allocation it will allocate just for 1 cpu,
|
|
* as we start by cpu 0.
|
|
*/
|
|
if (perf_evsel__alloc_counts(evsel, cpus->nr, 1) < 0) {
|
|
pr_debug("perf_evsel__alloc_counts(ncpus=%d)\n", cpus->nr);
|
|
goto out_close_fd;
|
|
}
|
|
|
|
err = 0;
|
|
|
|
for (cpu = 0; cpu < cpus->nr; ++cpu) {
|
|
unsigned int expected;
|
|
|
|
if (cpus->map[cpu] >= CPU_SETSIZE)
|
|
continue;
|
|
|
|
if (perf_evsel__read_on_cpu(evsel, cpu, 0) < 0) {
|
|
pr_debug("perf_evsel__read_on_cpu\n");
|
|
err = -1;
|
|
break;
|
|
}
|
|
|
|
expected = nr_openat_calls + cpu;
|
|
if (perf_counts(evsel->counts, cpu, 0)->val != expected) {
|
|
pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls on cpu %d, got %" PRIu64 "\n",
|
|
expected, cpus->map[cpu], perf_counts(evsel->counts, cpu, 0)->val);
|
|
err = -1;
|
|
}
|
|
}
|
|
|
|
perf_evsel__free_counts(evsel);
|
|
out_close_fd:
|
|
perf_evsel__close_fd(evsel, 1, threads->nr);
|
|
out_evsel_delete:
|
|
perf_evsel__delete(evsel);
|
|
out_thread_map_delete:
|
|
thread_map__put(threads);
|
|
return err;
|
|
}
|