[igt-dev] [PATCH i-g-t v3 1/3] tests/xe: Add basic idle residency test
Riana Tauro
riana.tauro at intel.com
Tue Jul 11 06:54:22 UTC 2023
This test validates idle residency measured over a time interval
is within the tolerance.
Patch for gtidle properties
https://patchwork.freedesktop.org/series/119262/
v2:
- rename file to xe_pm_residency
- add kernel patch in commit message (Kamil)
v3:
- add igt test description (Anshuman)
v4:
- fix cosmetic review comments
- replace assert with igt_assert_f (Anshuman)
v5:
- use tile sysfs library functions
Signed-off-by: Riana Tauro <riana.tauro at intel.com>
Reviewed-by: Anshuman Gupta <anshuman.gupta at intel.com>
---
tests/meson.build | 1 +
tests/xe/xe_pm_residency.c | 113 +++++++++++++++++++++++++++++++++++++
2 files changed, 114 insertions(+)
create mode 100644 tests/xe/xe_pm_residency.c
diff --git a/tests/meson.build b/tests/meson.build
index 0567449bf..995bc2e28 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -266,6 +266,7 @@ xe_progs = [
'xe_module_load',
'xe_noexec_ping_pong',
'xe_pm',
+ 'xe_pm_residency',
'xe_prime_self_import',
'xe_query',
'xe_sysfs_tile',
diff --git a/tests/xe/xe_pm_residency.c b/tests/xe/xe_pm_residency.c
new file mode 100644
index 000000000..5e55700bf
--- /dev/null
+++ b/tests/xe/xe_pm_residency.c
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+/**
+ * TEST: Test gtidle properties
+ * Category: Software building block
+ * Sub-category: Power Management
+ * Functionality: GT C States
+ * Test category: functionality test
+ */
+
+#include "igt.h"
+#include "igt_sysfs.h"
+
+#include "xe/xe_query.h"
+
+#define SLEEP_DURATION 3000 /* in milliseconds */
+
+const double tolerance = 0.1;
+
+#define assert_within_epsilon(x, ref, tol) \
+ igt_assert_f((double)(x) <= (1.0 + (tol)) * (double)(ref) && \
+ (double)(x) >= (1.0 - (tol)) * (double)(ref), \
+ "'%s' != '%s' (%f not within +%.1f%%/-%.1f%% tolerance of %f)\n",\
+ #x, #ref, (double)(x), \
+ (tol) * 100.0, (tol) * 100.0, \
+ (double)(ref))
+
+IGT_TEST_DESCRIPTION("Tests for gtidle properties");
+
+static unsigned int measured_usleep(unsigned int usec)
+{
+ struct timespec ts = { };
+ unsigned int slept;
+
+ slept = igt_nsec_elapsed(&ts);
+ igt_assert(slept == 0);
+ do {
+ usleep(usec - slept);
+ slept = igt_nsec_elapsed(&ts) / 1000;
+ } while (slept < usec);
+
+ return igt_nsec_elapsed(&ts) / 1000;
+}
+
+static bool in_gt_c6(int fd, int gt)
+{
+ char gt_c_state[16];
+ int gt_fd;
+
+ gt_fd = xe_sysfs_gt_open(fd, gt);
+ igt_assert(gt_fd >= 0);
+ igt_assert(igt_sysfs_scanf(gt_fd, "gtidle/idle_status", "%s", gt_c_state) == 1);
+ close(gt_fd);
+
+ return strcmp(gt_c_state, "gt-c6") == 0;
+}
+
+static unsigned long read_idle_residency(int fd, int gt)
+{
+ unsigned long residency = 0;
+ int gt_fd;
+
+ gt_fd = xe_sysfs_gt_open(fd, gt);
+ igt_assert(gt_fd >= 0);
+ igt_assert(igt_sysfs_scanf(gt_fd, "gtidle/idle_residency_ms", "%lu", &residency) == 1);
+ close(gt_fd);
+
+ return residency;
+}
+
+/**
+ * SUBTEST: idle-residency
+ * Description: basic residency test to validate idle residency
+ * measured over a time interval is within the tolerance
+ * Run type: FULL
+ */
+static void test_idle_residency(int fd, int gt)
+{
+ unsigned long elapsed_ms, residency_start, residency_end;
+
+ igt_assert_f(igt_wait(in_gt_c6(fd, gt), 1000, 1), "GT not in C6\n");
+
+ residency_start = read_idle_residency(fd, gt);
+ elapsed_ms = measured_usleep(SLEEP_DURATION * 1000) / 1000;
+ residency_end = read_idle_residency(fd, gt);
+
+ igt_info("Measured %lums of idle residency in %lums\n",
+ residency_end - residency_start, elapsed_ms);
+
+ assert_within_epsilon(residency_end - residency_start, elapsed_ms, tolerance);
+}
+
+igt_main
+{
+ int fd, gt;
+
+ igt_fixture {
+ fd = drm_open_driver(DRIVER_XE);
+ igt_require(!IS_PONTEVECCHIO(xe_dev_id(fd)));
+ }
+
+ igt_describe("Validates idle residency measured over a time interval is within the tolerance");
+ igt_subtest("idle-residency")
+ xe_for_each_gt(fd, gt)
+ test_idle_residency(fd, gt);
+
+ igt_fixture {
+ close(fd);
+ }
+}
--
2.40.0
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