[igt-dev] [PATCH i-g-t 2/2] tests/i915_pm_rps: Exercise sysfs thresholds
Rodrigo Vivi
rodrigo.vivi at intel.com
Fri Jul 14 17:26:30 UTC 2023
On Tue, Jul 11, 2023 at 05:02:14PM +0100, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
>
> Exercise a bunch of up and down rps thresholds to verify hardware
> is happy with them all.
>
> To limit the overall runtime relies on probability and number of runs
> to approach complete coverage.
>
> v2:
> * Common sync spinner code now in library.
>
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> ---
> tests/i915/i915_pm_rps.c | 194 +++++++++++++++++++++++++++++++++++++++
> 1 file changed, 194 insertions(+)
>
> diff --git a/tests/i915/i915_pm_rps.c b/tests/i915/i915_pm_rps.c
> index 7044fcd81c56..8c370b35c85b 100644
> --- a/tests/i915/i915_pm_rps.c
> +++ b/tests/i915/i915_pm_rps.c
> @@ -39,8 +39,10 @@
> #include "i915/gem.h"
> #include "i915/gem_create.h"
> #include "igt.h"
> +#include "igt_aux.h"
> #include "igt_dummyload.h"
> #include "igt_perf.h"
> +#include "igt_rand.h"
> #include "igt_sysfs.h"
> /**
> * TEST: i915 pm rps
> @@ -81,6 +83,22 @@
> * SUBTEST: waitboost
> * Feature: pm_rps
> * Run type: FULL
> + *
> + * SUBTEST: thresholds
> + * Feature: pm_rps
> + * Run type: FULL
> + *
> + * SUBTEST: thresholds-idle
> + * Feature: pm_rps
> + * Run type: FULL
> + *
> + * SUBTEST: thresholds-idle-park
> + * Feature: pm_rps
> + * Run type: FULL
> + *
> + * SUBTEST: thresholds-park
> + * Feature: pm_rps
> + * Run type: FULL
> */
>
> IGT_TEST_DESCRIPTION("Render P-States tests - verify GPU frequency changes");
> @@ -920,6 +938,146 @@ static void pm_rps_exit_handler(int sig)
> drm_close_driver(drm_fd);
> }
>
> +static struct i915_engine_class_instance
> +find_dword_engine(int i915, const unsigned int gt)
> +{
> + struct i915_engine_class_instance *engines, ci = { -1, -1 };
> + unsigned int i, count;
> +
> + engines = gem_list_engines(i915, 1u << gt, ~0u, &count);
> + igt_assert(engines);
> +
> + for (i = 0; i < count; i++) {
> + if (!gem_class_can_store_dword(i915, engines[i].engine_class))
> + continue;
> +
> + ci = engines[i];
> + break;
> + }
> +
> + free(engines);
> +
> + return ci;
> +}
> +
> +static igt_spin_t *spin_sync_gt(int i915, uint64_t ahnd, unsigned int gt,
> + const intel_ctx_t **ctx)
> +{
> + struct i915_engine_class_instance ci = { -1, -1 };
> + struct intel_execution_engine2 e = { };
> +
> + ci = find_dword_engine(i915, gt);
> +
> + igt_require(ci.engine_class != (uint16_t)I915_ENGINE_CLASS_INVALID);
> +
> + if (gem_has_contexts(i915)) {
> + e.class = ci.engine_class;
> + e.instance = ci.engine_instance;
> + e.flags = 0;
> + *ctx = intel_ctx_create_for_engine(i915, e.class, e.instance);
> + } else {
> + igt_require(gt == 0); /* Impossible anyway. */
I'm confused by the comment here... if it is impossible why we have code below?!
but why impossible?
anyway, the tests below are great for the sysfs that you are adding. Thanks
Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
> + e.class = gem_execbuf_flags_to_engine_class(I915_EXEC_DEFAULT);
> + e.instance = 0;
> + e.flags = I915_EXEC_DEFAULT;
> + *ctx = intel_ctx_0(i915);
> + }
> +
> + igt_debug("Using engine %u:%u\n", e.class, e.instance);
> +
> + return __igt_sync_spin(i915, ahnd, *ctx, &e);
> +}
> +
> +#define TEST_IDLE 0x1
> +#define TEST_PARK 0x2
> +static void test_thresholds(int i915, unsigned int gt, unsigned int flags)
> +{
> + uint64_t ahnd = get_reloc_ahnd(i915, 0);
> + const unsigned int points = 10;
> + unsigned int def_up, def_down;
> + igt_spin_t *spin = NULL;
> + const intel_ctx_t *ctx;
> + unsigned int *ta, *tb;
> + unsigned int i;
> + int sysfs;
> +
> + sysfs = igt_sysfs_gt_open(i915, gt);
> + igt_require(sysfs >= 0);
> +
> + /* Feature test */
> + def_up = igt_sysfs_get_u32(sysfs, "rps_up_threshold_pct");
> + def_down = igt_sysfs_get_u32(sysfs, "rps_down_threshold_pct");
> + igt_require(def_up && def_down);
> +
> + /* Check invalid percentages are rejected */
> + igt_assert_eq(igt_sysfs_set_u32(sysfs, "rps_up_threshold_pct", 101), false);
> + igt_assert_eq(igt_sysfs_set_u32(sysfs, "rps_down_threshold_pct", 101), false);
> +
> + /*
> + * Invent some random up-down thresholds, but always include 0 and 100
> + * just to have some wild edge cases.
> + */
> + ta = calloc(points, sizeof(unsigned int));
> + tb = calloc(points, sizeof(unsigned int));
> + igt_require(ta && tb);
> +
> + ta[0] = tb[0] = 0;
> + ta[1] = tb[1] = 100;
> + hars_petruska_f54_1_random_seed(time(NULL));
> + for (i = 2; i < points; i++) {
> + ta[i] = hars_petruska_f54_1_random_unsafe_max(100);
> + tb[i] = hars_petruska_f54_1_random_unsafe_max(100);
> + }
> + igt_permute_array(ta, points, igt_exchange_int);
> + igt_permute_array(tb, points, igt_exchange_int);
> +
> + /* Exercise the thresholds with a GPU load to trigger park/unpark etc */
> + for (i = 0; i < points; i++) {
> + igt_info("Testing thresholds up %u%% and down %u%%...\n", ta[i], tb[i]);
> + igt_assert_eq(igt_sysfs_set_u32(sysfs, "rps_up_threshold_pct", ta[i]), true);
> + igt_assert_eq(igt_sysfs_set_u32(sysfs, "rps_down_threshold_pct", tb[i]), true);
> +
> + if (flags & TEST_IDLE) {
> + gem_quiescent_gpu(i915);
> + } else if (spin) {
> + intel_ctx_destroy(i915, ctx);
> + igt_spin_free(i915, spin);
> + spin = NULL;
> + if (flags & TEST_PARK) {
> + gem_quiescent_gpu(i915);
> + usleep(500000);
> + }
> + }
> + spin = spin_sync_gt(i915, ahnd, gt, &ctx);
> + usleep(1000000);
> + if (flags & TEST_IDLE) {
> + intel_ctx_destroy(i915, ctx);
> + igt_spin_free(i915, spin);
> + if (flags & TEST_PARK) {
> + gem_quiescent_gpu(i915);
> + usleep(500000);
> + }
> + spin = NULL;
> + }
> + }
> +
> + if (spin) {
> + intel_ctx_destroy(i915, ctx);
> + igt_spin_free(i915, spin);
> + }
> +
> + gem_quiescent_gpu(i915);
> +
> + /* Restore defaults */
> + igt_assert_eq(igt_sysfs_set_u32(sysfs, "rps_up_threshold_pct", def_up), true);
> + igt_assert_eq(igt_sysfs_set_u32(sysfs, "rps_down_threshold_pct", def_down), true);
> +
> + free(ta);
> + free(tb);
> + close(sysfs);
> + put_ahnd(ahnd);
> +}
> +
> igt_main
> {
> igt_fixture {
> @@ -1000,6 +1158,42 @@ igt_main
> igt_disallow_hang(drm_fd, hang);
> }
>
> + igt_subtest_with_dynamic("thresholds-idle") {
> + int tmp, gt;
> +
> + i915_for_each_gt(drm_fd, tmp, gt) {
> + igt_dynamic_f("gt%u", gt)
> + test_thresholds(drm_fd, gt, TEST_IDLE);
> + }
> + }
> +
> + igt_subtest_with_dynamic("thresholds") {
> + int tmp, gt;
> +
> + i915_for_each_gt(drm_fd, tmp, gt) {
> + igt_dynamic_f("gt%u", gt)
> + test_thresholds(drm_fd, gt, 0);
> + }
> + }
> +
> + igt_subtest_with_dynamic("thresholds-park") {
> + int tmp, gt;
> +
> + i915_for_each_gt(drm_fd, tmp, gt) {
> + igt_dynamic_f("gt%u", gt)
> + test_thresholds(drm_fd, gt, TEST_PARK);
> + }
> + }
> +
> + igt_subtest_with_dynamic("thresholds-idle-park") {
> + int tmp, gt;
> +
> + i915_for_each_gt(drm_fd, tmp, gt) {
> + igt_dynamic_f("gt%u", gt)
> + test_thresholds(drm_fd, gt, TEST_IDLE | TEST_PARK);
> + }
> + }
> +
> igt_fixture
> drm_close_driver(drm_fd);
> }
> --
> 2.39.2
>
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