igt/gem_exec_nop: Add a basic test
Demonstrate how trivial it is to lockup Braswell, at least my N3050 nuc,
by saturating the interrupt handler with a few requests.
References: https://bugs.freedesktop.org/show_bug.cgi?id=93467
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/tests/gem_exec_nop.c b/tests/gem_exec_nop.c
index 81c1377..18bcf1e 100644
--- a/tests/gem_exec_nop.c
+++ b/tests/gem_exec_nop.c
@@ -43,57 +43,123 @@
#define LOCAL_I915_EXEC_NO_RELOC (1<<11)
#define LOCAL_I915_EXEC_HANDLE_LUT (1<<12)
-#define LOCAL_I915_EXEC_VEBOX (4<<0)
+#define LOCAL_I915_EXEC_BSD_SHIFT (13)
+#define LOCAL_I915_EXEC_BSD_MASK (3 << LOCAL_I915_EXEC_BSD_SHIFT)
-const uint32_t batch[2] = {MI_BATCH_BUFFER_END};
-int device;
+#define ENGINE_FLAGS (I915_EXEC_RING_MASK | LOCAL_I915_EXEC_BSD_MASK)
-static void loop(int fd, uint32_t handle, unsigned ring_id, const char *ring_name)
+static double elapsed(const struct timespec *start, const struct timespec *end)
+{
+ return ((end->tv_sec - start->tv_sec) +
+ (end->tv_nsec - start->tv_nsec)*1e-9);
+}
+
+static void single(int fd, uint32_t handle, unsigned ring_id, const char *ring_name)
{
struct drm_i915_gem_execbuffer2 execbuf;
- struct drm_i915_gem_exec_object2 gem_exec[1];
- int count;
+ struct drm_i915_gem_exec_object2 obj;
+ struct timespec start, now;
+ unsigned int count = 0;
gem_require_ring(fd, ring_id);
- memset(&gem_exec, 0, sizeof(gem_exec));
- gem_exec[0].handle = handle;
+ memset(&obj, 0, sizeof(obj));
+ obj.handle = handle;
memset(&execbuf, 0, sizeof(execbuf));
- execbuf.buffers_ptr = (uintptr_t)gem_exec;
+ execbuf.buffers_ptr = (uintptr_t)&obj;
execbuf.buffer_count = 1;
execbuf.flags = ring_id;
execbuf.flags |= LOCAL_I915_EXEC_HANDLE_LUT;
execbuf.flags |= LOCAL_I915_EXEC_NO_RELOC;
- if (drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf)) {
+ if (__gem_execbuf(fd, &execbuf) == 0) {
execbuf.flags = ring_id;
- do_ioctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf);
+ gem_execbuf(fd, &execbuf);
}
gem_sync(fd, handle);
- for (count = 1; count <= SLOW_QUICK(1<<17, 1<<4); count <<= 1) {
- int loops = count;
- gem_set_domain(fd, handle, I915_GEM_DOMAIN_GTT, 0);
- while (loops--)
- do_ioctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf);
- gem_sync(fd, handle);
+ clock_gettime(CLOCK_MONOTONIC, &start);
+ do {
+ for (int loop = 0; loop < 1024; loop++) {
+ gem_execbuf(fd, &execbuf);
+ count++;
+ }
+ clock_gettime(CLOCK_MONOTONIC, &now);
+ } while (elapsed(&start, &now) < 20.);
+ gem_sync(fd, handle);
+ clock_gettime(CLOCK_MONOTONIC, &now);
+
+ igt_info("%s: %'u cycles: %.3fus\n",
+ ring_name, count, elapsed(&start, &now)*1e6 / count);
+}
+
+static void all(int fd, uint32_t handle)
+{
+ struct drm_i915_gem_execbuffer2 execbuf;
+ struct drm_i915_gem_exec_object2 obj;
+ struct timespec start, now;
+ unsigned engines[16];
+ unsigned nengine;
+ unsigned engine;
+ unsigned int count = 0;
+
+ nengine = 0;
+ for_each_engine(fd, engine)
+ engines[nengine++] = engine;
+
+ memset(&obj, 0, sizeof(obj));
+ obj.handle = handle;
+
+ memset(&execbuf, 0, sizeof(execbuf));
+ execbuf.buffers_ptr = (uintptr_t)&obj;
+ execbuf.buffer_count = 1;
+ execbuf.flags |= LOCAL_I915_EXEC_HANDLE_LUT;
+ execbuf.flags |= LOCAL_I915_EXEC_NO_RELOC;
+ if (__gem_execbuf(fd, &execbuf) == 0) {
+ execbuf.flags = 0;
+ gem_execbuf(fd, &execbuf);
}
+ gem_sync(fd, handle);
+
+ clock_gettime(CLOCK_MONOTONIC, &start);
+ do {
+ for (int loop = 0; loop < 1024; loop++) {
+ for (int n = 0; n < nengine; n++) {
+ execbuf.flags &= ~ENGINE_FLAGS;
+ execbuf.flags |= engines[n];
+ gem_execbuf(fd, &execbuf);
+ }
+ }
+ count += nengine * 1024;
+ clock_gettime(CLOCK_MONOTONIC, &now);
+ } while (elapsed(&start, &now) < 150.); /* Hang detection ~120s */
+ gem_sync(fd, handle);
+ clock_gettime(CLOCK_MONOTONIC, &now);
+
+ igt_info("All (%d engines): %'u cycles: %.3fus\n",
+ nengine, count, elapsed(&start, &now)*1e6 / count);
}
igt_main
{
const struct intel_execution_engine *e;
uint32_t handle = 0;
+ int device = -1;
igt_fixture {
+ const uint32_t bbe = MI_BATCH_BUFFER_END;
+
device = drm_open_driver(DRIVER_INTEL);
handle = gem_create(device, 4096);
- gem_write(device, handle, 0, batch, sizeof(batch));
+ gem_write(device, handle, 0, &bbe, sizeof(bbe));
}
for (e = intel_execution_engines; e->name; e++)
igt_subtest_f("%s", e->name)
- loop(device, handle, e->exec_id | e->flags, e->name);
+ single(device, handle, e->exec_id | e->flags, e->name);
+
+ igt_subtest("basic")
+ all(device, handle);
igt_fixture {
gem_close(device, handle);