On Fri, Mar 18, 2016 at 03:08:56PM -0300, Tiago Vignatti wrote:
This patch adds ioctl-errors subtest to be used for exercising prime sync ioctl errors.
The subtest constantly interrupts via signals a function doing concurrent blit to stress out the right usage of prime_sync_*, making sure these ioctl errors are handled accordingly. Important to note that in case of failure (e.g. in a case where the ioctl wouldn't try again in a return error) this test does not reliably catch the problem with 100% of accuracy.
v2: fix prime sync direction when reading mmap'ed file. v3: change the upper bound using time rather than loops
Cc: Chris Wilson chris@chris-wilson.co.uk Signed-off-by: Tiago Vignatti tiago.vignatti@intel.com
I'm probably blind, but where is the reviewed kernel patch for this? If it's somewhere hidden, please resubmit with all the whizzbang stuff needed for merging added ;-)
Thanks, Daniel
tests/prime_mmap_coherency.c | 89 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+)
diff --git a/tests/prime_mmap_coherency.c b/tests/prime_mmap_coherency.c index 180d8a4..d2b2a4f 100644 --- a/tests/prime_mmap_coherency.c +++ b/tests/prime_mmap_coherency.c @@ -180,6 +180,90 @@ static void test_write_flush(bool expect_stale_cache) munmap(ptr_cpu, width * height); }
+static void blit_and_cmp(void) +{
- drm_intel_bo *bo_1;
- drm_intel_bo *bo_2;
- uint32_t *ptr_cpu;
- uint32_t *ptr2_cpu;
- int dma_buf_fd, dma_buf2_fd, i;
- int local_fd;
- drm_intel_bufmgr *local_bufmgr;
- struct intel_batchbuffer *local_batch;
- /* recreate process local variables */
- local_fd = drm_open_driver(DRIVER_INTEL);
- local_bufmgr = drm_intel_bufmgr_gem_init(local_fd, 4096);
- igt_assert(local_bufmgr);
- local_batch = intel_batchbuffer_alloc(local_bufmgr, intel_get_drm_devid(local_fd));
- igt_assert(local_batch);
- bo_1 = drm_intel_bo_alloc(local_bufmgr, "BO 1", width * height * 4, 4096);
- dma_buf_fd = prime_handle_to_fd_for_mmap(local_fd, bo_1->handle);
- igt_skip_on(errno == EINVAL);
- ptr_cpu = mmap(NULL, width * height, PROT_READ | PROT_WRITE,
MAP_SHARED, dma_buf_fd, 0);- igt_assert(ptr_cpu != MAP_FAILED);
- bo_2 = drm_intel_bo_alloc(local_bufmgr, "BO 2", width * height * 4, 4096);
- dma_buf2_fd = prime_handle_to_fd_for_mmap(local_fd, bo_2->handle);
- ptr2_cpu = mmap(NULL, width * height, PROT_READ | PROT_WRITE,
MAP_SHARED, dma_buf2_fd, 0);- igt_assert(ptr2_cpu != MAP_FAILED);
- /* Fill up BO 1 with '1's and BO 2 with '0's */
- prime_sync_start(dma_buf_fd, true);
- memset(ptr_cpu, 0x11, width * height);
- prime_sync_end(dma_buf_fd, true);
- prime_sync_start(dma_buf2_fd, true);
- memset(ptr2_cpu, 0x00, width * height);
- prime_sync_end(dma_buf2_fd, true);
- /* Copy BO 1 into BO 2, using blitter. */
- intel_copy_bo(local_batch, bo_2, bo_1, width * height);
- usleep(0); /* let someone else claim the mutex */
- /* Compare BOs. If prime_sync_* were executed properly, the caches
* should be synced. */- prime_sync_start(dma_buf2_fd, false);
- for (i = 0; i < (width * height) / 4; i++)
igt_fail_on_f(ptr2_cpu[i] != 0x11111111, "Found 0x%08x at offset 0x%08x\n", ptr2_cpu[i], i);- prime_sync_end(dma_buf2_fd, false);
- drm_intel_bo_unreference(bo_1);
- drm_intel_bo_unreference(bo_2);
- munmap(ptr_cpu, width * height);
- munmap(ptr2_cpu, width * height);
+}
+/*
- Constantly interrupt concurrent blits to stress out prime_sync_* and make
- sure these ioctl errors are handled accordingly.
- Important to note that in case of failure (e.g. in a case where the ioctl
- wouldn't try again in a return error) this test does not reliably catch the
- problem with 100% of accuracy.
- */
+static void test_ioctl_errors(void) +{
- int ncpus = sysconf(_SC_NPROCESSORS_ONLN);
- igt_fork_signal_helper();
- for (int num_children = 1; num_children <= 8 *ncpus; num_children <<= 1) {
igt_fork(child, num_children) {struct timespec start = {};while (igt_nsec_elapsed(&start) <= num_children)blit_and_cmp();}igt_waitchildren();- }
- igt_stop_signal_helper();
+}
int main(int argc, char **argv) { int i; @@ -235,6 +319,11 @@ int main(int argc, char **argv) igt_fail_on_f(!stale, "couldn't find any stale cache lines\n"); }
- igt_subtest("ioctl-errors") {
igt_info("exercising concurrent blit to get ioctl errors\n");test_ioctl_errors();- }
- igt_fixture { intel_batchbuffer_free(batch); drm_intel_bufmgr_destroy(bufmgr);
-- 2.1.4