We are seeing several instances where the RPe, which can be altered by pcode dynamically, is causing subtests to fail randomly. Instead of relying on it, we can use a mid frequency value for these subtests and avoid these failures. Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2262 Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2256 Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@xxxxxxxxx> --- tests/intel/xe_gt_freq.c | 37 +++++++++++++++++++++++++++++-------- 1 file changed, 29 insertions(+), 8 deletions(-) diff --git a/tests/intel/xe_gt_freq.c b/tests/intel/xe_gt_freq.c index 93ebb5ed0..442f5658f 100644 --- a/tests/intel/xe_gt_freq.c +++ b/tests/intel/xe_gt_freq.c @@ -26,6 +26,9 @@ #include <sys/time.h> #define MAX_N_EXEC_QUEUES 16 +#define GT_FREQUENCY_MULTIPLIER 50 +#define GT_FREQUENCY_SCALER 3 +#define FREQ_UNIT_MHZ (GT_FREQUENCY_MULTIPLIER / GT_FREQUENCY_SCALER) /* * Too many intermediate components and steps before freq is adjusted @@ -70,6 +73,16 @@ static uint32_t get_freq(int fd, int gt_id, const char *freq_name) return freq; } +static bool within_expected_range(uint32_t freq, uint32_t val) +{ + /* + * GT Frequencies are requested at units of 16.66 Mhz, so allow + * that tolerance. + */ + return (freq <= val + FREQ_UNIT_MHZ) || + (freq >= val - FREQ_UNIT_MHZ); +} + static uint32_t rpe(int fd, int gt_id) { return get_freq(fd, gt_id, "rpe"); @@ -128,6 +141,8 @@ static void test_freq_basic_api(int fd, int gt_id) { uint32_t rpn = get_freq(fd, gt_id, "rpn"); uint32_t rp0 = get_freq(fd, gt_id, "rp0"); + uint32_t rpmid = (rp0 + rpn) / 2; + uint32_t min_freq, max_freq; /* * Negative bound tests @@ -142,16 +157,18 @@ static void test_freq_basic_api(int fd, int gt_id) /* Assert min requests are respected from rp0 to rpn */ igt_assert(set_freq(fd, gt_id, "min", rp0) > 0); igt_assert(get_freq(fd, gt_id, "min") == rp0); - igt_assert(set_freq(fd, gt_id, "min", rpe(fd, gt_id)) > 0); - igt_assert(get_freq(fd, gt_id, "min") == rpe(fd, gt_id)); + igt_assert(set_freq(fd, gt_id, "min", rpmid) > 0); + min_freq = get_freq(fd, gt_id, "min"); + igt_assert(within_expected_range(min_freq, rpmid)); igt_assert(set_freq(fd, gt_id, "min", rpn) > 0); igt_assert(get_freq(fd, gt_id, "min") == rpn); /* Assert max requests are respected from rpn to rp0 */ igt_assert(set_freq(fd, gt_id, "max", rpn) > 0); igt_assert(get_freq(fd, gt_id, "max") == rpn); - igt_assert(set_freq(fd, gt_id, "max", rpe(fd, gt_id)) > 0); - igt_assert(get_freq(fd, gt_id, "max") == rpe(fd, gt_id)); + igt_assert(set_freq(fd, gt_id, "max", rpmid) > 0); + max_freq = get_freq(fd, gt_id, "min"); + igt_assert(within_expected_range(max_freq, rpmid)); igt_assert(set_freq(fd, gt_id, "max", rp0) > 0); igt_assert(get_freq(fd, gt_id, "max") == rp0); } @@ -168,6 +185,8 @@ static void test_freq_fixed(int fd, int gt_id, bool gt_idle) { uint32_t rpn = get_freq(fd, gt_id, "rpn"); uint32_t rp0 = get_freq(fd, gt_id, "rp0"); + uint32_t rpmid = (rp0 + rpn) / 2; + uint32_t cur_freq, act_freq; igt_debug("Starting testing fixed request\n"); @@ -190,17 +209,19 @@ static void test_freq_fixed(int fd, int gt_id, bool gt_idle) igt_assert(get_freq(fd, gt_id, "act") == rpn); } - igt_assert(set_freq(fd, gt_id, "min", rpe(fd, gt_id)) > 0); - igt_assert(set_freq(fd, gt_id, "max", rpe(fd, gt_id)) > 0); + igt_assert(set_freq(fd, gt_id, "min", rpmid) > 0); + igt_assert(set_freq(fd, gt_id, "max", rpmid) > 0); usleep(ACT_FREQ_LATENCY_US); - igt_assert(get_freq(fd, gt_id, "cur") == rpe(fd, gt_id)); + cur_freq = get_freq(fd, gt_id, "cur"); + igt_assert(within_expected_range(cur_freq, rpmid)); if (gt_idle) { igt_assert_f(igt_wait(xe_is_gt_in_c6(fd, gt_id), 1000, 10), "GT %d should be in C6\n", gt_id); igt_assert(get_freq(fd, gt_id, "act") == 0); } else { - igt_assert(get_freq(fd, gt_id, "act") == rpe(fd, gt_id)); + act_freq = get_freq(fd, gt_id, "act"); + igt_assert(within_expected_range(act_freq, rpmid)); } igt_assert(set_freq(fd, gt_id, "min", rp0) > 0); -- 2.38.1
