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prime_self_import: Assure no pending requests before object counting

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We don't want a previously used object to be freed in the middle of a
before/after object counting operation (or we would get a "-1 objects
leaked" message). We have seen this happening, e.g., when a context
from a previous run dies, but its backing object is alive waiting for
a retire_work to kick in.

v2: Use igt_debugfs facilities for drop cache.
v3: Move igt_drop_caches_set() call inside get_object_count() to make
it clearer why we want this.

Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Cc: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Oscar Mateo 2013-11-05 10:56:24 +00:00 committed by Daniel Vetter
parent eeaf013214
commit ece21fa865
1 changed files with 9 additions and 2 deletions
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11
tests/prime_self_import.c
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@ -46,6 +46,7 @@
#include "drm.h"
#include "i915_drm.h"
#include "drmtest.h"
#include "igt_debugfs.h"
#define BO_SIZE (16*1024)
@ -218,6 +219,8 @@ static int get_object_count(void)
int device = drm_get_card();
char *path;
igt_drop_caches_set(DROP_RETIRE);
ret = asprintf(&path, "/sys/kernel/debug/dri/%d/i915_gem_objects", device);
igt_assert(ret != -1);
@ -252,10 +255,12 @@ static void test_reimport_close_race(void)
pthread_t *threads;
int r, i, num_threads;
int fds[2];
int obj_count = get_object_count();
int obj_count;
void *status;
uint32_t handle;
obj_count = get_object_count();
num_threads = sysconf(_SC_NPROCESSORS_ONLN);
threads = calloc(num_threads, sizeof(pthread_t));
@ -330,9 +335,11 @@ static void test_export_close_race(void)
pthread_t *threads;
int r, i, num_threads;
int fd;
int obj_count = get_object_count();
int obj_count;
void *status;
obj_count = get_object_count();
num_threads = sysconf(_SC_NPROCESSORS_ONLN);
threads = calloc(num_threads, sizeof(pthread_t));