[PATCH i-g-t 4/4] tests/gem_scheduler: Add subtests to test batch priority behaviour

[Derek Morton <derek.j.morton@xxxxxxxxx>]

Add subtests to test each ring to check batch buffers of a higher
priority will be executed before batch buffers of a lower priority.

Signed-off-by: Derek Morton <derek.j.morton@xxxxxxxxx>
---
 tests/gem_scheduler.c | 34 ++++++++++++++++++++++++++++------
 1 file changed, 28 insertions(+), 6 deletions(-)

diff --git a/tests/gem_scheduler.c b/tests/gem_scheduler.c
index 4824c13..febde01 100644
--- a/tests/gem_scheduler.c
+++ b/tests/gem_scheduler.c
@@ -39,7 +39,8 @@
 
 IGT_TEST_DESCRIPTION("Check scheduler behaviour. Basic tests ensure independant "
                      "batch buffers of the same priority are executed in "
-                     "submission order. Read-read tests ensure "
+                     "submission order. Priority tests ensure higher priority "
+                     "batch buffers are executed first. Read-read tests ensure "
                      "batch buffers with a read dependency to the same buffer "
                      "object do not block each other. Write-write dependency "
                      "tests ensure batch buffers with a write dependency to a "
@@ -61,11 +62,13 @@ struct ring {
 
 #define NBR_RINGS (sizeof(rings)/sizeof(struct ring))
 
-/* Basic test. Check batch buffers of the same priority and with no dependencies
- * are executed in the order they are submitted.
+/* If 'priority' is set false, check batch buffers of the same priority and with
+ * no dependencies are executed in the order they are submitted.
+ * If 'priority' is set true, check batch buffers of higher priority are
+ * executed before batch buffers of lower priority.
  */
 #define NBR_BASIC_FDs (3)
-static void run_test_basic(int in_flight, int ringid)
+static void run_test_basic(int in_flight, int ringid, bool priority)
 {
 	int fd[NBR_BASIC_FDs];
 	int loop;
@@ -95,6 +98,15 @@ static void run_test_basic(int in_flight, int ringid)
 		intel_batchbuffer_free(noop_bb);
 	}
 
+	if(priority) {
+		struct local_i915_gem_context_param param;
+		param.context = 0; /* Default context */
+		param.size = 0;
+		param.param = LOCAL_CONTEXT_PARAM_PRIORITY;
+		param.value = 1000;
+		gem_context_set_param(fd[2], &param);
+	}
+
 	/* Create buffer objects */
 	delay_bo = drm_intel_bo_alloc(bufmgr[0], "delay bo", BATCH_SZ, BATCH_SZ);
 	igt_assert(delay_bo);
@@ -146,7 +158,12 @@ static void run_test_basic(int in_flight, int ringid)
 	igt_assert_f(igt_compare_timestamps(delay_buf[2], ts1_buf[0]),
 	             "Delay ts (0x%08" PRIx32 ") > TS1 ts (0x%08" PRIx32 ")\n",
 	             delay_buf[2], ts1_buf[0]);
-	igt_assert_f(igt_compare_timestamps(ts1_buf[0], ts2_buf[0]),
+	if(priority)
+		igt_assert_f(igt_compare_timestamps(ts2_buf[0], ts1_buf[0]),
+		             "TS2 ts (0x%08" PRIx32 ") > TS1 ts (0x%08" PRIx32 ")\n",
+		             ts2_buf[0], ts1_buf[0]);
+	else
+		igt_assert_f(igt_compare_timestamps(ts1_buf[0], ts2_buf[0]),
 	             "TS1 ts (0x%08" PRIx32 ") > TS2 ts (0x%08" PRIx32 ")\n",
 	             ts1_buf[0], ts2_buf[0]);
 
@@ -393,7 +410,12 @@ igt_main
 
 	for (loop=0; loop < NBR_RINGS; loop++)
 		igt_subtest_f("%s-basic", rings[loop].name) {
-			run_test_basic(in_flight, rings[loop].id);
+			run_test_basic(in_flight, rings[loop].id, false);
+		}
+
+	for (loop=0; loop < NBR_RINGS; loop++)
+		igt_subtest_f("%s-priority", rings[loop].name) {
+			run_test_basic(in_flight, rings[loop].id, true);
 		}
 
 	for (loop=0; loop < NBR_RINGS; loop++)
-- 
1.9.1

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