[Intel-gfx] [PATCH i-g-t] tests: Add gem_spin_batch

[Mika Kuoppala]

Add gem_spin_batch to test that the dummyload infra
is working properly. Can be also act as tool to force
a single engine to be busy for controlled period of time.

v2: plenty of igt-fu improvements (Chris)
v3: nesting batches for more utilization, epsilon fun (Chris)

Cc: Abdiel Janulgue <abdiel.janulgue at linux.intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Mika Kuoppala <mika.kuoppala at intel.com>
---
 tests/Makefile.sources |  1 +
 tests/gem_spin_batch.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 86 insertions(+)
 create mode 100644 tests/gem_spin_batch.c

diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 6e07d93..1763b67 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -214,6 +214,7 @@ TESTS_progs = \
 	gem_unfence_active_buffers \
 	gem_unref_active_buffers \
 	gem_wait \
+	gem_spin_batch \
 	gem_workarounds \
 	gen3_mixed_blits \
 	gen3_render_linear_blits \
diff --git a/tests/gem_spin_batch.c b/tests/gem_spin_batch.c
new file mode 100644
index 0000000..a408fe1
--- /dev/null
+++ b/tests/gem_spin_batch.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright © 2017 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#include "igt.h"
+
+#define MAX_ERROR 3 /* % */
+
+#define assert_within_epsilon(x, ref, tolerance) \
+	igt_assert_f(100 * x <= (100 + tolerance) * ref && \
+		     100 * x >= (100 - tolerance) * ref, \
+		     "'%s' != '%s' (%ld not within %d%% tolerance of %ld)\n", \
+		     #x, #ref, (int64_t)x, tolerance, (int64_t)ref)
+
+static void basic(int fd, unsigned int engine, unsigned int timeout_sec)
+{
+	const uint64_t timeout_100ms = 100000000LL;
+	unsigned long loops = 0;
+	igt_spin_t *spin;
+	struct timespec tv = { };
+	uint64_t elapsed;
+
+	spin = igt_spin_batch_new(fd, engine, 0);
+	while ((elapsed = igt_nsec_elapsed(&tv)) >> 30 < timeout_sec) {
+		igt_spin_t *next = igt_spin_batch_new(fd, engine, 0);
+
+		igt_spin_batch_set_timeout(spin, timeout_100ms);
+		gem_sync(fd, spin->handle);
+		loops++;
+
+		igt_spin_batch_free(fd, spin);
+		spin = next;
+	}
+	igt_spin_batch_free(fd, spin);
+
+	assert_within_epsilon(timeout_100ms * loops, elapsed, MAX_ERROR);
+	igt_assert_eq(intel_detect_and_clear_missed_interrupts(fd), 0);
+}
+
+igt_main
+{
+	const struct intel_execution_engine *e;
+	int fd = -1;
+
+	igt_skip_on_simulation();
+
+	igt_fixture {
+		fd = drm_open_driver(DRIVER_INTEL);
+		igt_require_gem(fd);
+		igt_fork_hang_detector(fd);
+	}
+
+	for (e = intel_execution_engines; e->name; e++) {
+		if (e->exec_id == 0)
+			continue;
+
+		igt_subtest_f("basic-%s", e->name)
+			basic(fd, e->exec_id, 3);
+	}
+
+	igt_fixture {
+		igt_stop_hang_detector();
+		close(fd);
+	}
+}
-- 
2.7.4