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* [igt-dev] [PATCH v2 i-g-t] tests/i915_pm_freq_api: Add a suspend subtest
@ 2023-06-12 19:42 Vinay Belgaumkar
  2023-06-12 20:50 ` [igt-dev] ✓ Fi.CI.BAT: success for tests/i915_pm_freq_api: Add a suspend subtest (rev2) Patchwork
                   ` (2 more replies)
  0 siblings, 3 replies; 5+ messages in thread
From: Vinay Belgaumkar @ 2023-06-12 19:42 UTC (permalink / raw)
  To: intel-gfx, igt-dev

Verify that SLPC API works as expected after a suspend. Added
another subtest that does multiple GT resets and checks freq api
works as expected after each one.

We now check requested frequency instead of soft min/max after a
reset or suspend. That ensures the soft limits got applied
correctly at init. Also, disable efficient freq before starting the
test which allows current freq to be consistent with SLPC min freq.

v2: Restore freq in exit handler (Ashutosh)

Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
---
 tests/i915/i915_pm_freq_api.c | 89 +++++++++++++++++++++++++++--------
 1 file changed, 69 insertions(+), 20 deletions(-)

diff --git a/tests/i915/i915_pm_freq_api.c b/tests/i915/i915_pm_freq_api.c
index 9005cd220..4e1d4edca 100644
--- a/tests/i915/i915_pm_freq_api.c
+++ b/tests/i915/i915_pm_freq_api.c
@@ -18,6 +18,12 @@
  *
  * SUBTEST: freq-reset
  * Description: Test basic freq API works after a reset
+ *
+ * SUBTEST: freq-reset-multiple
+ * Description: Test basic freq API works after multiple resets
+ *
+ * SUBTEST: freq-suspend
+ * Description: Test basic freq API works after a runtime suspend
  */
 
 IGT_TEST_DESCRIPTION("Test SLPC freq API");
@@ -79,31 +85,64 @@ static void test_freq_basic_api(int dirfd, int gt)
 
 }
 
-static void test_reset(int i915, int dirfd, int gt)
+static void test_reset(int i915, int dirfd, int gt, int count)
 {
 	uint32_t rpn = get_freq(dirfd, RPS_RPn_FREQ_MHZ);
 	int fd;
 
+	for (int i = 0; i < count; i++) {
+		igt_assert_f(set_freq(dirfd, RPS_MIN_FREQ_MHZ, rpn) > 0,
+			     "Failed after %d good cycles\n", i);
+		igt_assert_f(set_freq(dirfd, RPS_MAX_FREQ_MHZ, rpn) > 0,
+			     "Failed after %d good cycles\n", i);
+		usleep(ACT_FREQ_LATENCY_US);
+		igt_assert_f(get_freq(dirfd, RPS_CUR_FREQ_MHZ) == rpn,
+			     "Failed after %d good cycles\n", i);
+
+		/* Manually trigger a GT reset */
+		fd = igt_debugfs_gt_open(i915, gt, "reset", O_WRONLY);
+		igt_require(fd >= 0);
+		igt_ignore_warn(write(fd, "1\n", 2));
+
+		igt_assert_f(get_freq(dirfd, RPS_CUR_FREQ_MHZ) == rpn,
+			     "Failed after %d good cycles\n", i);
+	}
+	close(fd);
+}
+
+static void test_suspend(int i915, int dirfd, int gt)
+{
+	uint32_t rpn = get_freq(dirfd, RPS_RPn_FREQ_MHZ);
+
 	igt_assert(set_freq(dirfd, RPS_MIN_FREQ_MHZ, rpn) > 0);
 	igt_assert(set_freq(dirfd, RPS_MAX_FREQ_MHZ, rpn) > 0);
 	usleep(ACT_FREQ_LATENCY_US);
-	igt_assert(get_freq(dirfd, RPS_MIN_FREQ_MHZ) == rpn);
+	igt_assert(get_freq(dirfd, RPS_CUR_FREQ_MHZ) == rpn);
 
-	/* Manually trigger a GT reset */
-	fd = igt_debugfs_gt_open(i915, gt, "reset", O_WRONLY);
-	igt_require(fd >= 0);
-	igt_ignore_warn(write(fd, "1\n", 2));
-	close(fd);
+	/* Manually trigger a suspend */
+	igt_system_suspend_autoresume(SUSPEND_STATE_S3,
+				      SUSPEND_TEST_NONE);
 
-	igt_assert(get_freq(dirfd, RPS_MIN_FREQ_MHZ) == rpn);
-	igt_assert(get_freq(dirfd, RPS_MAX_FREQ_MHZ) == rpn);
+	igt_assert(get_freq(dirfd, RPS_CUR_FREQ_MHZ) == rpn);
 }
 
-igt_main
+int i915 = -1;
+uint32_t *stash_min, *stash_max;
+
+static void restore_sysfs_freq(int sig)
 {
-	int i915 = -1;
-	uint32_t *stash_min, *stash_max;
+	int dirfd, gt;
+	/* Restore frequencies */
+	for_each_sysfs_gt_dirfd(i915, dirfd, gt) {
+		igt_pm_ignore_slpc_efficient_freq(i915, dirfd, false);
+		igt_assert(set_freq(dirfd, RPS_MAX_FREQ_MHZ, stash_max[gt]) > 0);
+		igt_assert(set_freq(dirfd, RPS_MIN_FREQ_MHZ, stash_min[gt]) > 0);
+	}
+	close(i915);
+}
 
+igt_main
+{
 	igt_fixture {
 		int num_gts, dirfd, gt;
 
@@ -122,7 +161,9 @@ igt_main
 		for_each_sysfs_gt_dirfd(i915, dirfd, gt) {
 			stash_min[gt] = get_freq(dirfd, RPS_MIN_FREQ_MHZ);
 			stash_max[gt] = get_freq(dirfd, RPS_MAX_FREQ_MHZ);
+			igt_pm_ignore_slpc_efficient_freq(i915, dirfd, true);
 		}
+		igt_install_exit_handler(restore_sysfs_freq);
 	}
 
 	igt_describe("Test basic API for controlling min/max GT frequency");
@@ -140,16 +181,24 @@ igt_main
 
 		for_each_sysfs_gt_dirfd(i915, dirfd, gt)
 			igt_dynamic_f("gt%u", gt)
-				test_reset(i915, dirfd, gt);
+				test_reset(i915, dirfd, gt, 1);
 	}
 
-	igt_fixture {
+	igt_describe("Test basic freq API works after multiple resets");
+	igt_subtest_with_dynamic_f("freq-reset-multiple") {
 		int dirfd, gt;
-		/* Restore frequencies */
-		for_each_sysfs_gt_dirfd(i915, dirfd, gt) {
-			igt_assert(set_freq(dirfd, RPS_MAX_FREQ_MHZ, stash_max[gt]) > 0);
-			igt_assert(set_freq(dirfd, RPS_MIN_FREQ_MHZ, stash_min[gt]) > 0);
-		}
-		close(i915);
+
+		for_each_sysfs_gt_dirfd(i915, dirfd, gt)
+			igt_dynamic_f("gt%u", gt)
+				test_reset(i915, dirfd, gt, 50);
+	}
+
+	igt_describe("Test basic freq API works after suspend");
+	igt_subtest_with_dynamic_f("freq-suspend") {
+		int dirfd, gt;
+
+		for_each_sysfs_gt_dirfd(i915, dirfd, gt)
+			igt_dynamic_f("gt%u", gt)
+				test_suspend(i915, dirfd, gt);
 	}
 }
-- 
2.38.1

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Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
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2023-06-12 19:42 [igt-dev] [PATCH v2 i-g-t] tests/i915_pm_freq_api: Add a suspend subtest Vinay Belgaumkar
2023-06-12 20:50 ` [igt-dev] ✓ Fi.CI.BAT: success for tests/i915_pm_freq_api: Add a suspend subtest (rev2) Patchwork
2023-06-13  6:35 ` [igt-dev] ✓ Fi.CI.IGT: " Patchwork
2023-06-13 21:25 ` [igt-dev] [Intel-gfx] [PATCH v2 i-g-t] tests/i915_pm_freq_api: Add a suspend subtest Dixit, Ashutosh
2023-06-14  1:01   ` Belgaumkar, Vinay

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