From: Tvrtko Ursulin <[email protected]> Using imported objects should not leak i915 vmas (and vms).
In practice this simulates Xorg importing fbcon and leaking (or not) one vma per Xorg startup cycle. Signed-off-by: Tvrtko Ursulin <[email protected]> Cc: Chris Wilson <[email protected]> --- tests/gem_ppgtt.c | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) diff --git a/tests/gem_ppgtt.c b/tests/gem_ppgtt.c index 5bf773c..9b5b3ee 100644 --- a/tests/gem_ppgtt.c +++ b/tests/gem_ppgtt.c @@ -200,6 +200,103 @@ static void surfaces_check(dri_bo **bo, int count, uint32_t expected) } } +static void flink_and_contexts(void) +{ + drm_intel_bufmgr *bufmgr; + int fd, fd2; + dri_bo *bo; + uint32_t flink_name; + unsigned int max_line = 0, num_lines = 0, cnt = 0; + int ret; + + /* + * Export a bo via flink and access it from a child process via a + * different ppggtt context. Make sure when child exists that the vma + * (and hence the vm), associated with its ppgtt context, is torn down. + */ + + fd = drm_open_any(); + + bufmgr = drm_intel_bufmgr_gem_init(fd, 4096); + igt_assert(bufmgr); + + bo = create_bo(bufmgr, 0); + igt_assert(bo); + + ret = drm_intel_bo_flink(bo, &flink_name); + igt_assert(ret == 0); + + igt_fork(child, 20) { + int devid; + drm_intel_bufmgr *bufmgr; + int fd; + dri_bo *bo, *import; + struct intel_batchbuffer *batch; + + fd = drm_open_any(); + devid = intel_get_drm_devid(fd); + + bufmgr = drm_intel_bufmgr_gem_init(fd, 4096); + igt_assert(bufmgr); + + bo = create_bo(bufmgr, 0); + import = drm_intel_bo_gem_create_from_name(bufmgr, + "flink_and_contexts", + flink_name); + igt_assert(bo && import); + + batch = intel_batchbuffer_alloc(bufmgr, devid); + igt_assert(batch); + + intel_copy_bo(batch, bo, import, SIZE); + + intel_batchbuffer_free(batch); + + dri_bo_unreference(import); + dri_bo_unreference(bo); + + drm_intel_bufmgr_destroy(bufmgr); + close(fd); + + exit(0); + } + + igt_waitchildren(); + + /* + * Count the longest line in the file which lists the vmas per object. + * This might be a bit fragile so maybe there is a better way. + */ + fd2 = open("/sys/kernel/debug/dri/0/i915_gem_gtt", O_RDONLY); + igt_assert(fd2 >= 0); + + do { + char ch; + + ret = read(fd2, &ch, 1); + if (ret == 0) + break; + igt_assert(ret == 1); + if (ch == '\n') { + if (cnt > max_line) + max_line = cnt; + num_lines++; + cnt = 0; + } else { + cnt++; + } + } while (true); + + close(fd2); + + dri_bo_unreference(bo); + drm_intel_bufmgr_destroy(bufmgr); + close(fd); + + igt_assert(num_lines >= 1); + igt_assert(max_line < 1000); +} + #define N_CHILD 8 int main(int argc, char **argv) { @@ -229,5 +326,8 @@ int main(int argc, char **argv) surfaces_check(rcs, N_CHILD, 0x8000 / N_CHILD); } + igt_subtest("flink-vs-ctx-vm-leak") + flink_and_contexts(); + igt_exit(); } -- 2.3.5 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
