提交 4ebbcb84 编写于 作者: J Jiri Olsa

perf tests: Add test for caching dso file descriptors

Adding test that setup test_dso_data__fd_limit and test
dso data file descriptors are cached appropriately.
Acked-by: NNamhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1401892622-30848-13-git-send-email-jolsa@kernel.orgSigned-off-by: NJiri Olsa <jolsa@kernel.org>
上级 822c45db
......@@ -52,9 +52,13 @@ static struct test {
.func = test__pmu,
},
{
.desc = "Test dso data interface",
.desc = "Test dso data read",
.func = test__dso_data,
},
{
.desc = "Test dso data cache",
.func = test__dso_data_cache,
},
{
.desc = "roundtrip evsel->name check",
.func = test__perf_evsel__roundtrip_name_test,
......
#include "util.h"
#include <stdlib.h>
#include <linux/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <api/fs/fs.h>
#include "util.h"
#include "machine.h"
#include "symbol.h"
#include "tests.h"
......@@ -154,3 +155,131 @@ int test__dso_data(void)
unlink(file);
return 0;
}
static long open_files_cnt(void)
{
char path[PATH_MAX];
struct dirent *dent;
DIR *dir;
long nr = 0;
scnprintf(path, PATH_MAX, "%s/self/fd", procfs__mountpoint());
pr_debug("fd path: %s\n", path);
dir = opendir(path);
TEST_ASSERT_VAL("failed to open fd directory", dir);
while ((dent = readdir(dir)) != NULL) {
if (!strcmp(dent->d_name, ".") ||
!strcmp(dent->d_name, ".."))
continue;
nr++;
}
closedir(dir);
return nr - 1;
}
static struct dso **dsos;
static int dsos__create(int cnt, int size)
{
int i;
dsos = malloc(sizeof(dsos) * cnt);
TEST_ASSERT_VAL("failed to alloc dsos array", dsos);
for (i = 0; i < cnt; i++) {
char *file;
file = test_file(size);
TEST_ASSERT_VAL("failed to get dso file", file);
dsos[i] = dso__new(file);
TEST_ASSERT_VAL("failed to get dso", dsos[i]);
}
return 0;
}
static void dsos__delete(int cnt)
{
int i;
for (i = 0; i < cnt; i++) {
struct dso *dso = dsos[i];
unlink(dso->name);
dso__delete(dso);
}
free(dsos);
}
static int set_fd_limit(int n)
{
struct rlimit rlim;
if (getrlimit(RLIMIT_NOFILE, &rlim))
return -1;
pr_debug("file limit %ld, new %d\n", (long) rlim.rlim_cur, n);
rlim.rlim_cur = n;
return setrlimit(RLIMIT_NOFILE, &rlim);
}
int test__dso_data_cache(void)
{
struct machine machine;
long nr_end, nr = open_files_cnt();
int dso_cnt, limit, i, fd;
memset(&machine, 0, sizeof(machine));
/* set as system limit */
limit = nr * 4;
TEST_ASSERT_VAL("failed to set file limit", !set_fd_limit(limit));
/* and this is now our dso open FDs limit + 1 extra */
dso_cnt = limit / 2 + 1;
TEST_ASSERT_VAL("failed to create dsos\n",
!dsos__create(dso_cnt, TEST_FILE_SIZE));
for (i = 0; i < (dso_cnt - 1); i++) {
struct dso *dso = dsos[i];
/*
* Open dsos via dso__data_fd or dso__data_read_offset.
* Both opens the data file and keep it open.
*/
if (i % 2) {
fd = dso__data_fd(dso, &machine);
TEST_ASSERT_VAL("failed to get fd", fd > 0);
} else {
#define BUFSIZE 10
u8 buf[BUFSIZE];
ssize_t n;
n = dso__data_read_offset(dso, &machine, 0, buf, BUFSIZE);
TEST_ASSERT_VAL("failed to read dso", n == BUFSIZE);
}
}
/* open +1 dso over the allowed limit */
fd = dso__data_fd(dsos[i], &machine);
TEST_ASSERT_VAL("failed to get fd", fd > 0);
/* should force the first one to be closed */
TEST_ASSERT_VAL("failed to close dsos[0]", dsos[0]->data.fd == -1);
/* cleanup everything */
dsos__delete(dso_cnt);
/* Make sure we did not leak any file descriptor. */
nr_end = open_files_cnt();
pr_debug("nr start %ld, nr stop %ld\n", nr, nr_end);
TEST_ASSERT_VAL("failed leadking files", nr == nr_end);
return 0;
}
......@@ -28,6 +28,7 @@ int test__syscall_open_tp_fields(void);
int test__pmu(void);
int test__attr(void);
int test__dso_data(void);
int test__dso_data_cache(void);
int test__parse_events(void);
int test__hists_link(void);
int test__python_use(void);
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册