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. v2: Fix bug in the tolerance function. Remove rpe usage from freq_range* as well (Badal). Fix test documentation to reflect change (Riana). v3: Actual frequency cannot be guaranteed to follow the requested value v4: Handle cases where RPe can be greater than min/cur freq. Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2200 Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2196 Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2262 Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2256 Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2203 Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2412 Cc: Riana Tauro <riana.tauro@xxxxxxxxx> Cc: Badal Nilawar <badal.nilawar@xxxxxxxxx> Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@xxxxxxxxx> --- tests/intel/xe_gt_freq.c | 57 ++++++++++++++++++++++++++++------------ 1 file changed, 40 insertions(+), 17 deletions(-) diff --git a/tests/intel/xe_gt_freq.c b/tests/intel/xe_gt_freq.c index 93ebb5ed0..c9d59508b 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 DIV_ROUND_CLOSEST(GT_FREQUENCY_MULTIPLIER, GT_FREQUENCY_SCALER) /* * Too many intermediate components and steps before freq is adjusted @@ -70,9 +73,14 @@ static uint32_t get_freq(int fd, int gt_id, const char *freq_name) return freq; } -static uint32_t rpe(int fd, int gt_id) +static bool within_expected_range(uint32_t freq, uint32_t val) { - return get_freq(fd, gt_id, "rpe"); + /* + * 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 get_throttle(int fd, int gt_id, const char *throttle_file) @@ -128,6 +136,8 @@ 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 +152,19 @@ 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"); + /* SLPC can set min higher than rpmid - as it follows RPe */ + igt_assert(min_freq >= (rpmid - FREQ_UNIT_MHZ)); 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, "max"); + 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); } @@ -168,13 +181,16 @@ 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"); /* * For Fixed freq we need to set both min and max to the desired value * Then we check if hardware is actually operating at the desired freq - * And let's do this for all the 3 known Render Performance (RP) values. + * And let's do this for all the 2 known Render Performance (RP) values + * RP0 and RPn and something in between. */ igt_assert(set_freq(fd, gt_id, "min", rpn) > 0); igt_assert(set_freq(fd, gt_id, "max", rpn) > 0); @@ -190,17 +206,20 @@ 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"); + /* If rpmid is around RPe, we could see SLPC follow it */ + igt_assert(cur_freq >= (rpmid - FREQ_UNIT_MHZ)); 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(act_freq <= cur_freq + FREQ_UNIT_MHZ); } igt_assert(set_freq(fd, gt_id, "min", rp0) > 0); @@ -232,15 +251,17 @@ static void test_freq_fixed(int fd, int gt_id, bool gt_idle) static void test_freq_range(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, act; igt_debug("Starting testing range request\n"); igt_assert(set_freq(fd, gt_id, "min", rpn) > 0); - igt_assert(set_freq(fd, gt_id, "max", rpe(fd, gt_id)) > 0); + igt_assert(set_freq(fd, gt_id, "max", rpmid) > 0); usleep(ACT_FREQ_LATENCY_US); cur = get_freq(fd, gt_id, "cur"); - igt_assert(rpn <= cur && cur <= rpe(fd, gt_id)); + igt_assert(rpn <= cur && cur <= rpmid + FREQ_UNIT_MHZ); if (gt_idle) { igt_assert_f(igt_wait(xe_is_gt_in_c6(fd, gt_id), 1000, 10), @@ -248,7 +269,7 @@ static void test_freq_range(int fd, int gt_id, bool gt_idle) igt_assert(get_freq(fd, gt_id, "act") == 0); } else { act = get_freq(fd, gt_id, "act"); - igt_assert(rpn <= act && act <= rpe(fd, gt_id)); + igt_assert((rpn <= act) && (act <= cur + FREQ_UNIT_MHZ)); } igt_debug("Finished testing range request\n"); @@ -262,17 +283,19 @@ static void test_freq_range(int fd, int gt_id, bool gt_idle) static void test_freq_low_max(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; /* * When max request < min request, max is ignored and min works like * a fixed one. Let's assert this assumption */ - igt_assert(set_freq(fd, gt_id, "min", rpe(fd, gt_id)) > 0); + igt_assert(set_freq(fd, gt_id, "min", rpmid) > 0); igt_assert(set_freq(fd, gt_id, "max", rpn) > 0); usleep(ACT_FREQ_LATENCY_US); - /* Refresh value of rpe, pcode could have adjusted it */ - igt_assert(get_freq(fd, gt_id, "cur") == rpe(fd, gt_id)); + /* Cur freq will follow RPe, which could be higher than min freq */ + igt_assert(get_freq(fd, gt_id, "cur") >= (rpmid - FREQ_UNIT_MHZ)); } /** -- 2.38.1
