[igt-dev] [PATCH i-g-t v3 2/3] tests/gem_eio: Speed up test execution
Tvrtko Ursulin
tursulin at ursulin.net
Fri Mar 23 11:54:28 UTC 2018
From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
If we stop relying on regular GPU hangs to be detected, but trigger them
manually as soon as we know our batch of interest is actually executing
on the GPU, we can dramatically speed up various subtests.
This is enabled by the pollable spin batch added in the previous patch.
v2:
* Test gem_wait after reset/wedge and with reset/wedge after a few
predefined intervals since gem_wait invocation. (Chris Wilson)
v3:
Chris Wilson:
* Decrease short test to 1us.
* Use POSIX timers instead of signals to avoid interrupting gem_wait.
* Improve comment.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Suggested-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Antonio Argenziano <antonio.argenziano at intel.com>
---
tests/Makefile.am | 1 +
tests/gem_eio.c | 235 +++++++++++++++++++++++++++++++++++++++++-------------
tests/meson.build | 8 +-
3 files changed, 189 insertions(+), 55 deletions(-)
diff --git a/tests/Makefile.am b/tests/Makefile.am
index dbc7be722eb9..f41ad5096349 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -130,6 +130,7 @@ gem_userptr_blits_CFLAGS = $(AM_CFLAGS) $(THREAD_CFLAGS)
gem_userptr_blits_LDADD = $(LDADD) -lpthread
perf_pmu_LDADD = $(LDADD) $(top_builddir)/lib/libigt_perf.la
+gem_eio_LDADD = $(LDADD) -lrt
gem_wait_LDADD = $(LDADD) -lrt
kms_flip_LDADD = $(LDADD) -lrt -lpthread
pm_rc6_residency_LDADD = $(LDADD) -lrt
diff --git a/tests/gem_eio.c b/tests/gem_eio.c
index 4bcc5937db39..b824d9d4c9c0 100644
--- a/tests/gem_eio.c
+++ b/tests/gem_eio.c
@@ -35,6 +35,8 @@
#include <inttypes.h>
#include <errno.h>
#include <sys/ioctl.h>
+#include <signal.h>
+#include <time.h>
#include <drm.h>
@@ -62,6 +64,10 @@ static bool i915_reset_control(bool enable)
static void trigger_reset(int fd)
{
+ struct timespec ts = { };
+
+ igt_nsec_elapsed(&ts);
+
igt_force_gpu_reset(fd);
/* And just check the gpu is indeed running again */
@@ -69,22 +75,12 @@ static void trigger_reset(int fd)
gem_test_engine(fd, ALL_ENGINES);
gem_quiescent_gpu(fd);
-}
-
-static void wedge_gpu(int fd)
-{
- /* First idle the GPU then disable GPU resets before injecting a hang */
- gem_quiescent_gpu(fd);
-
- igt_require(i915_reset_control(false));
-
- igt_debug("Wedging GPU by injecting hang\n");
- igt_post_hang_ring(fd, igt_hang_ring(fd, I915_EXEC_DEFAULT));
- igt_assert(i915_reset_control(true));
+ /* We expect forced reset and health check to be quick. */
+ igt_assert(igt_seconds_elapsed(&ts) < 2);
}
-static void wedgeme(int drm_fd)
+static void manual_hang(int drm_fd)
{
int dir = igt_debugfs_dir(drm_fd);
@@ -93,6 +89,16 @@ static void wedgeme(int drm_fd)
close(dir);
}
+static void wedge_gpu(int fd)
+{
+ /* First idle the GPU then disable GPU resets before injecting a hang */
+ gem_quiescent_gpu(fd);
+
+ igt_require(i915_reset_control(false));
+ manual_hang(fd);
+ igt_assert(i915_reset_control(true));
+}
+
static int __gem_throttle(int fd)
{
int err = 0;
@@ -149,26 +155,124 @@ static int __gem_wait(int fd, uint32_t handle, int64_t timeout)
return err;
}
-static void test_wait(int fd)
+static igt_spin_t * __spin_poll(int fd, uint32_t ctx, unsigned long flags)
{
- igt_hang_t hang;
+ if (gem_can_store_dword(fd, flags))
+ return __igt_spin_batch_new_poll(fd, ctx, flags);
+ else
+ return __igt_spin_batch_new(fd, ctx, flags, 0);
+}
+
+static void __spin_wait(int fd, igt_spin_t *spin)
+{
+ if (spin->running) {
+ igt_spin_busywait_until_running(spin);
+ } else {
+ igt_debug("__spin_wait - usleep mode\n");
+ usleep(500e3); /* Better than nothing! */
+ }
+}
+
+static igt_spin_t * spin_sync(int fd, uint32_t ctx, unsigned long flags)
+{
+ igt_spin_t *spin = __spin_poll(fd, ctx, flags);
+
+ __spin_wait(fd, spin);
+
+ return spin;
+}
+
+struct hang_ctx {
+ int debugfs;
+ struct timespec ts;
+ timer_t timer;
+};
+
+static void hang_handler(union sigval arg)
+{
+ struct hang_ctx *ctx = arg.sival_ptr;
+
+ igt_debug("hang delay = %.2fus\n", igt_nsec_elapsed(&ctx->ts) / 1000.0);
+
+ igt_assert(igt_sysfs_set(ctx->debugfs, "i915_wedged", "-1"));
+
+ igt_assert_eq(timer_delete(ctx->timer), 0);
+ close(ctx->debugfs);
+ free(ctx);
+}
+
+static void hang_after(int fd, unsigned int us)
+{
+ struct sigevent sev = {
+ .sigev_notify = SIGEV_THREAD,
+ .sigev_notify_function = hang_handler
+ };
+ struct itimerspec its = {
+ .it_value.tv_sec = us / USEC_PER_SEC,
+ .it_value.tv_nsec = us % USEC_PER_SEC * 1000,
+ };
+ struct hang_ctx *ctx;
+
+ ctx = calloc(1, sizeof(*ctx));
+ igt_assert(ctx);
+
+ ctx->debugfs = igt_debugfs_dir(fd);
+ igt_assert_fd(ctx->debugfs);
+
+ sev.sigev_value.sival_ptr = ctx;
+
+ igt_assert_eq(timer_create(CLOCK_MONOTONIC, &sev, &ctx->timer), 0);
+
+ igt_nsec_elapsed(&ctx->ts);
+
+ igt_assert_eq(timer_settime(ctx->timer, 0, &its, NULL), 0);
+}
+
+static int __check_wait(int fd, uint32_t bo, unsigned int wait)
+{
+ unsigned long wait_timeout = 250e6; /* Some margin for actual reset. */
+ int ret;
+
+ if (wait) {
+ /*
+ * Double the wait plus some fixed margin to ensure gem_wait
+ * can never time out before the async hang runs.
+ */
+ wait_timeout += wait * 2000 + 250e6;
+ hang_after(fd, wait);
+ } else {
+ manual_hang(fd);
+ }
+
+ ret = __gem_wait(fd, bo, wait_timeout);
+
+ return ret;
+}
+
+#define TEST_WEDGE (1)
+
+static void test_wait(int fd, unsigned int flags, unsigned int wait)
+{
+ igt_spin_t *hang;
igt_require_gem(fd);
- /* If the request we wait on completes due to a hang (even for
+ /*
+ * If the request we wait on completes due to a hang (even for
* that request), the user expects the return value to 0 (success).
*/
- hang = igt_hang_ring(fd, I915_EXEC_DEFAULT);
- igt_assert_eq(__gem_wait(fd, hang.handle, -1), 0);
- igt_post_hang_ring(fd, hang);
- /* If the GPU is wedged during the wait, again we expect the return
- * value to be 0 (success).
- */
- igt_require(i915_reset_control(false));
- hang = igt_hang_ring(fd, I915_EXEC_DEFAULT);
- igt_assert_eq(__gem_wait(fd, hang.handle, -1), 0);
- igt_post_hang_ring(fd, hang);
+ if (flags & TEST_WEDGE)
+ igt_require(i915_reset_control(false));
+ else
+ igt_require(i915_reset_control(true));
+
+ hang = spin_sync(fd, 0, I915_EXEC_DEFAULT);
+
+ igt_assert_eq(__check_wait(fd, hang->handle, wait), 0);
+
+ igt_spin_batch_free(fd, hang);
+
igt_require(i915_reset_control(true));
trigger_reset(fd);
@@ -181,7 +285,7 @@ static void test_suspend(int fd, int state)
/* Check we can suspend when the driver is already wedged */
igt_require(i915_reset_control(false));
- wedgeme(fd);
+ manual_hang(fd);
igt_system_suspend_autoresume(state, SUSPEND_TEST_DEVICES);
@@ -189,7 +293,7 @@ static void test_suspend(int fd, int state)
trigger_reset(fd);
}
-static void test_inflight(int fd)
+static void test_inflight(int fd, unsigned int wait)
{
const uint32_t bbe = MI_BATCH_BUFFER_END;
struct drm_i915_gem_exec_object2 obj[2];
@@ -209,11 +313,10 @@ static void test_inflight(int fd)
int fence[64]; /* conservative estimate of ring size */
gem_quiescent_gpu(fd);
-
igt_debug("Starting %s on engine '%s'\n", __func__, e__->name);
igt_require(i915_reset_control(false));
- hang = __igt_spin_batch_new(fd, 0, engine, 0);
+ hang = spin_sync(fd, 0, engine);
obj[0].handle = hang->handle;
memset(&execbuf, 0, sizeof(execbuf));
@@ -227,7 +330,8 @@ static void test_inflight(int fd)
igt_assert(fence[n] != -1);
}
- igt_assert_eq(__gem_wait(fd, obj[1].handle, -1), 0);
+ igt_assert_eq(__check_wait(fd, obj[1].handle, wait), 0);
+
for (unsigned int n = 0; n < ARRAY_SIZE(fence); n++) {
igt_assert_eq(sync_fence_status(fence[n]), -EIO);
close(fence[n]);
@@ -256,7 +360,7 @@ static void test_inflight_suspend(int fd)
obj[1].handle = gem_create(fd, 4096);
gem_write(fd, obj[1].handle, 0, &bbe, sizeof(bbe));
- hang = __igt_spin_batch_new(fd, 0, 0, 0);
+ hang = spin_sync(fd, 0, 0);
obj[0].handle = hang->handle;
memset(&execbuf, 0, sizeof(execbuf));
@@ -273,7 +377,8 @@ static void test_inflight_suspend(int fd)
igt_set_autoresume_delay(30);
igt_system_suspend_autoresume(SUSPEND_STATE_MEM, SUSPEND_TEST_NONE);
- igt_assert_eq(__gem_wait(fd, obj[1].handle, -1), 0);
+ igt_assert_eq(__check_wait(fd, obj[1].handle, 10), 0);
+
for (unsigned int n = 0; n < ARRAY_SIZE(fence); n++) {
igt_assert_eq(sync_fence_status(fence[n]), -EIO);
close(fence[n]);
@@ -301,7 +406,7 @@ static uint32_t context_create_safe(int i915)
return param.ctx_id;
}
-static void test_inflight_contexts(int fd)
+static void test_inflight_contexts(int fd, unsigned int wait)
{
struct drm_i915_gem_exec_object2 obj[2];
const uint32_t bbe = MI_BATCH_BUFFER_END;
@@ -330,7 +435,7 @@ static void test_inflight_contexts(int fd)
igt_debug("Starting %s on engine '%s'\n", __func__, e__->name);
igt_require(i915_reset_control(false));
- hang = __igt_spin_batch_new(fd, 0, engine, 0);
+ hang = spin_sync(fd, 0, engine);
obj[0].handle = hang->handle;
memset(&execbuf, 0, sizeof(execbuf));
@@ -345,7 +450,8 @@ static void test_inflight_contexts(int fd)
igt_assert(fence[n] != -1);
}
- igt_assert_eq(__gem_wait(fd, obj[1].handle, -1), 0);
+ igt_assert_eq(__check_wait(fd, obj[1].handle, wait), 0);
+
for (unsigned int n = 0; n < ARRAY_SIZE(fence); n++) {
igt_assert_eq(sync_fence_status(fence[n]), -EIO);
close(fence[n]);
@@ -375,7 +481,7 @@ static void test_inflight_external(int fd)
fence = igt_cork_plug(&cork, fd);
igt_require(i915_reset_control(false));
- hang = __igt_spin_batch_new(fd, 0, 0, 0);
+ hang = __spin_poll(fd, 0, 0);
memset(&obj, 0, sizeof(obj));
obj.handle = gem_create(fd, 4096);
@@ -393,6 +499,9 @@ static void test_inflight_external(int fd)
fence = execbuf.rsvd2 >> 32;
igt_assert(fence != -1);
+ __spin_wait(fd, hang);
+ manual_hang(fd);
+
gem_sync(fd, hang->handle); /* wedged, with an unready batch */
igt_assert(!gem_bo_busy(fd, hang->handle));
igt_assert(gem_bo_busy(fd, obj.handle));
@@ -407,7 +516,7 @@ static void test_inflight_external(int fd)
trigger_reset(fd);
}
-static void test_inflight_internal(int fd)
+static void test_inflight_internal(int fd, unsigned int wait)
{
struct drm_i915_gem_execbuffer2 execbuf;
struct drm_i915_gem_exec_object2 obj[2];
@@ -420,7 +529,7 @@ static void test_inflight_internal(int fd)
igt_require(gem_has_exec_fence(fd));
igt_require(i915_reset_control(false));
- hang = __igt_spin_batch_new(fd, 0, 0, 0);
+ hang = spin_sync(fd, 0, 0);
memset(obj, 0, sizeof(obj));
obj[0].handle = hang->handle;
@@ -441,7 +550,8 @@ static void test_inflight_internal(int fd)
nfence++;
}
- igt_assert_eq(__gem_wait(fd, obj[1].handle, -1), 0);
+ igt_assert_eq(__check_wait(fd, obj[1].handle, wait), 0);
+
while (nfence--) {
igt_assert_eq(sync_fence_status(fences[nfence]), -EIO);
close(fences[nfence]);
@@ -484,29 +594,46 @@ igt_main
igt_subtest("execbuf")
test_execbuf(fd);
- igt_subtest("wait")
- test_wait(fd);
-
igt_subtest("suspend")
test_suspend(fd, SUSPEND_STATE_MEM);
igt_subtest("hibernate")
test_suspend(fd, SUSPEND_STATE_DISK);
- igt_subtest("in-flight")
- test_inflight(fd);
-
- igt_subtest("in-flight-contexts")
- test_inflight_contexts(fd);
-
igt_subtest("in-flight-external")
test_inflight_external(fd);
- igt_subtest("in-flight-internal") {
- igt_skip_on(gem_has_semaphores(fd));
- test_inflight_internal(fd);
- }
-
igt_subtest("in-flight-suspend")
test_inflight_suspend(fd);
+
+ igt_subtest_group {
+ const struct {
+ unsigned int wait;
+ const char *name;
+ } waits[] = {
+ { .wait = 0, .name = "immediate" },
+ { .wait = 1, .name = "1us" },
+ { .wait = 10000, .name = "10ms" },
+ };
+ unsigned int i;
+
+ for (i = 0; i < sizeof(waits) / sizeof(waits[0]); i++) {
+ igt_subtest_f("wait-%s", waits[i].name)
+ test_wait(fd, 0, waits[i].wait);
+
+ igt_subtest_f("wait-wedge-%s", waits[i].name)
+ test_wait(fd, TEST_WEDGE, waits[i].wait);
+
+ igt_subtest_f("in-flight-%s", waits[i].name)
+ test_inflight(fd, waits[i].wait);
+
+ igt_subtest_f("in-flight-contexts-%s", waits[i].name)
+ test_inflight_contexts(fd, waits[i].wait);
+
+ igt_subtest_f("in-flight-internal-%s", waits[i].name) {
+ igt_skip_on(gem_has_semaphores(fd));
+ test_inflight_internal(fd, waits[i].wait);
+ }
+ }
+ }
}
diff --git a/tests/meson.build b/tests/meson.build
index 122aefabe0f0..4720dfe21a66 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -40,7 +40,6 @@ test_progs = [
'gem_ctx_switch',
'gem_ctx_thrash',
'gem_double_irq_loop',
- 'gem_eio',
'gem_evict_alignment',
'gem_evict_everything',
'gem_exec_alignment',
@@ -289,6 +288,13 @@ foreach prog : test_progs
install : true)
endforeach
+test_executables += executable('gem_eio', 'gem_eio.c',
+ dependencies : test_deps + [ realtime ],
+ install_dir : libexecdir,
+ install_rpath : rpathdir,
+ install : true)
+test_progs += 'gem_eio'
+
test_executables += executable('perf_pmu', 'perf_pmu.c',
dependencies : test_deps + [ lib_igt_perf ],
install_dir : libexecdir,
--
2.14.1
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