[Intel-gfx] [PATCH i-g-t] pm_rps: [RFC] RPS tests documentation update
Belgaumkar, Vinay
vinay.belgaumkar at intel.com
Thu Sep 7 18:28:38 UTC 2017
On 9/7/2017 5:15 AM, Katarzyna Dec wrote:
> Added comments in tricky places for better feature understanding.
> Added IGT_TEST_DESCRIPTION and short description for non-obvious
> subtests.
> Changed name of 'magic' checkit() function to something meaningfull.
> Changed junk struct and stuff array names.
> Made some minor coding style changes.
>
> Cc: Vinay Belgaumkar <vinay.belgaumkar at intel.com>
> Cc: Petri Latvala <petri.latvala at intel.com>
> Cc: Arkadiusz Hiler <arkadiusz.hiler at intel.com>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
>
> Signed-off: Katarzyna Dec <katarzyna.dec at intel.com>
> ---
> tests/pm_rps.c | 108 ++++++++++++++++++++++++++++++++++-----------------------
> 1 file changed, 64 insertions(+), 44 deletions(-)
>
> diff --git a/tests/pm_rps.c b/tests/pm_rps.c
> index e79f0ea7..1eeb6c6a 100644
> --- a/tests/pm_rps.c
> +++ b/tests/pm_rps.c
> @@ -40,6 +40,8 @@
>
> #include "intel_bufmgr.h"
>
> +IGT_TEST_DESCRIPTION("Render P-States tests - verify GPU frequency changes");
> +
> static int drm_fd;
>
> static const char sysfs_base_path[] = "/sys/class/drm/card%d/gt_%s_freq_mhz";
> @@ -56,12 +58,19 @@ enum {
>
> static int origfreqs[NUMFREQ];
>
> -struct junk {
> +struct sysfs_file {
> const char *name;
> const char *mode;
> FILE *filp;
> -} stuff[] = {
> - { "cur", "r", NULL }, { "min", "rb+", NULL }, { "max", "rb+", NULL }, { "RP0", "r", NULL }, { "RP1", "r", NULL }, { "RPn", "r", NULL }, { "boost", "rb+", NULL }, { NULL, NULL, NULL }
> +} sysfs_files[] = {
> + { "cur", "r", NULL },
> + { "min", "rb+", NULL },
> + { "max", "rb+", NULL },
> + { "RP0", "r", NULL },
> + { "RP1", "r", NULL },
> + { "RPn", "r", NULL },
> + { "boost", "rb+", NULL },
> + { NULL, NULL, NULL }
> };
>
> static int readval(FILE *filp)
> @@ -81,7 +90,7 @@ static void read_freqs(int *freqs)
> int i;
>
> for (i = 0; i < NUMFREQ; i++)
> - freqs[i] = readval(stuff[i].filp);
> + freqs[i] = readval(sysfs_files[i].filp);
> }
>
> static void nsleep(unsigned long ns)
> @@ -143,7 +152,7 @@ static int do_writeval(FILE *filp, int val, int lerrno, bool readback_check)
> #define writeval_inval(filp, val) do_writeval(filp, val, EINVAL, true)
> #define writeval_nocheck(filp, val) do_writeval(filp, val, 0, false)
>
> -static void checkit(const int *freqs)
> +static void check_freq_constraints(const int *freqs)
> {
> igt_assert_lte(freqs[MIN], freqs[MAX]);
> igt_assert_lte(freqs[CUR], freqs[MAX]);
> @@ -162,7 +171,7 @@ static void dump(const int *freqs)
>
> igt_debug("gt freq (MHz):");
> for (i = 0; i < NUMFREQ; i++)
> - igt_debug(" %s=%d", stuff[i].name, freqs[i]);
> + igt_debug(" %s=%d", sysfs_files[i].name, freqs[i]);
>
> igt_debug("\n");
> }
> @@ -387,14 +396,18 @@ static int get_hw_rounded_freq(int target)
> idx = MAX;
>
> old_freq = freqs[idx];
> - writeval_nocheck(stuff[idx].filp, target);
> + writeval_nocheck(sysfs_files[idx].filp, target);
> read_freqs(freqs);
> ret = freqs[idx];
> - writeval_nocheck(stuff[idx].filp, old_freq);
> + writeval_nocheck(sysfs_files[idx].filp, old_freq);
>
> return ret;
> }
>
> +/*
> + * Modify softlimit MIN and MAX freqs to valid and invalid levels. Depending
> + * on subtest run different check after each modification.
> + */
> static void min_max_config(void (*check)(void), bool load_gpu)
> {
> int fmid = (origfreqs[RPn] + origfreqs[RP0]) / 2;
> @@ -411,78 +424,78 @@ static void min_max_config(void (*check)(void), bool load_gpu)
> check();
>
> igt_debug("\nSet min=RPn and max=RP0...\n");
> - writeval(stuff[MIN].filp, origfreqs[RPn]);
> - writeval(stuff[MAX].filp, origfreqs[RP0]);
> + writeval(sysfs_files[MIN].filp, origfreqs[RPn]);
> + writeval(sysfs_files[MAX].filp, origfreqs[RP0]);
> if (load_gpu)
> do_load_gpu();
> check();
>
> igt_debug("\nIncrease min to midpoint...\n");
> - writeval(stuff[MIN].filp, fmid);
> + writeval(sysfs_files[MIN].filp, fmid);
> if (load_gpu)
> do_load_gpu();
> check();
>
> igt_debug("\nIncrease min to RP0...\n");
> - writeval(stuff[MIN].filp, origfreqs[RP0]);
> + writeval(sysfs_files[MIN].filp, origfreqs[RP0]);
> if (load_gpu)
> do_load_gpu();
> check();
>
> igt_debug("\nIncrease min above RP0 (invalid)...\n");
> - writeval_inval(stuff[MIN].filp, origfreqs[RP0] + 1000);
> + writeval_inval(sysfs_files[MIN].filp, origfreqs[RP0] + 1000);
> check();
>
> igt_debug("\nDecrease max to RPn (invalid)...\n");
> - writeval_inval(stuff[MAX].filp, origfreqs[RPn]);
> + writeval_inval(sysfs_files[MAX].filp, origfreqs[RPn]);
> check();
>
> igt_debug("\nDecrease min to midpoint...\n");
> - writeval(stuff[MIN].filp, fmid);
> + writeval(sysfs_files[MIN].filp, fmid);
> if (load_gpu)
> do_load_gpu();
> check();
>
> igt_debug("\nDecrease min to RPn...\n");
> - writeval(stuff[MIN].filp, origfreqs[RPn]);
> + writeval(sysfs_files[MIN].filp, origfreqs[RPn]);
> if (load_gpu)
> do_load_gpu();
> check();
>
> igt_debug("\nDecrease min below RPn (invalid)...\n");
> - writeval_inval(stuff[MIN].filp, 0);
> + writeval_inval(sysfs_files[MIN].filp, 0);
> check();
>
> igt_debug("\nDecrease max to midpoint...\n");
> - writeval(stuff[MAX].filp, fmid);
> + writeval(sysfs_files[MAX].filp, fmid);
> check();
>
> igt_debug("\nDecrease max to RPn...\n");
> - writeval(stuff[MAX].filp, origfreqs[RPn]);
> + writeval(sysfs_files[MAX].filp, origfreqs[RPn]);
> check();
>
> igt_debug("\nDecrease max below RPn (invalid)...\n");
> - writeval_inval(stuff[MAX].filp, 0);
> + writeval_inval(sysfs_files[MAX].filp, 0);
> check();
>
> igt_debug("\nIncrease min to RP0 (invalid)...\n");
> - writeval_inval(stuff[MIN].filp, origfreqs[RP0]);
> + writeval_inval(sysfs_files[MIN].filp, origfreqs[RP0]);
> check();
>
> igt_debug("\nIncrease max to midpoint...\n");
> - writeval(stuff[MAX].filp, fmid);
> + writeval(sysfs_files[MAX].filp, fmid);
> check();
>
> igt_debug("\nIncrease max to RP0...\n");
> - writeval(stuff[MAX].filp, origfreqs[RP0]);
> + writeval(sysfs_files[MAX].filp, origfreqs[RP0]);
> check();
>
> igt_debug("\nIncrease max above RP0 (invalid)...\n");
> - writeval_inval(stuff[MAX].filp, origfreqs[RP0] + 1000);
> + writeval_inval(sysfs_files[MAX].filp, origfreqs[RP0] + 1000);
> check();
>
> - writeval(stuff[MIN].filp, origfreqs[MIN]);
> - writeval(stuff[MAX].filp, origfreqs[MAX]);
> + writeval(sysfs_files[MIN].filp, origfreqs[MIN]);
> + writeval(sysfs_files[MAX].filp, origfreqs[MAX]);
> }
>
> static void basic_check(void)
> @@ -491,7 +504,7 @@ static void basic_check(void)
>
> read_freqs(freqs);
> dump(freqs);
Almost feel like we should create a new function read_and_dump_freqs()
instead of calling 2 functions multiple times. We should keep the old
read_freqs() since it is called in a loop on one occasion. Something to
think about maybe?
> - checkit(freqs);
> + check_freq_constraints(freqs);
> }
>
> #define IDLE_WAIT_TIMESTEP_MSEC 250
> @@ -506,7 +519,7 @@ static void idle_check(void)
> do {
> read_freqs(freqs);
> dump(freqs);
> - checkit(freqs);
> + check_freq_constraints(freqs);
> if (freqs[CUR] == freqs[RPn])
> break;
> usleep(1000 * IDLE_WAIT_TIMESTEP_MSEC);
> @@ -529,7 +542,7 @@ static void loaded_check(void)
> do {
> read_freqs(freqs);
> dump(freqs);
> - checkit(freqs);
> + check_freq_constraints(freqs);
> if (freqs[CUR] >= freqs[MAX])
> break;
> usleep(1000 * LOADED_WAIT_TIMESTEP_MSEC);
> @@ -547,6 +560,8 @@ static void stabilize_check(int *out)
> int freqs[NUMFREQ];
> int wait = 0;
>
> + /* Monitor frequencies until HW will stabilize cur frequency.
> + * It should happen within allotted time */
> read_freqs(freqs);
> dump(freqs);
> usleep(1000 * STABILIZE_WAIT_TIMESTEP_MSEC);
> @@ -573,7 +588,7 @@ static void boost_freq(int fd, int *boost_freqs)
>
> fmid = get_hw_rounded_freq(fmid);
> /* Set max freq to less then boost freq */
> - writeval(stuff[MAX].filp, fmid);
> + writeval(sysfs_files[MAX].filp, fmid);
>
> /* Put boost on the same engine as low load */
> engine = I915_EXEC_RENDER;
> @@ -592,7 +607,7 @@ static void boost_freq(int fd, int *boost_freqs)
> igt_spin_batch_free(fd, load);
>
> /* Set max freq to original softmax */
> - writeval(stuff[MAX].filp, origfreqs[MAX]);
> + writeval(sysfs_files[MAX].filp, origfreqs[MAX]);
> }
>
> static void waitboost(int fd, bool reset)
> @@ -634,12 +649,12 @@ static void waitboost(int fd, bool reset)
>
> static void pm_rps_exit_handler(int sig)
> {
> - if (origfreqs[MIN] > readval(stuff[MAX].filp)) {
> - writeval(stuff[MAX].filp, origfreqs[MAX]);
> - writeval(stuff[MIN].filp, origfreqs[MIN]);
> + if (origfreqs[MIN] > readval(sysfs_files[MAX].filp)) {
> + writeval(sysfs_files[MAX].filp, origfreqs[MAX]);
> + writeval(sysfs_files[MIN].filp, origfreqs[MIN]);
> } else {
> - writeval(stuff[MIN].filp, origfreqs[MIN]);
> - writeval(stuff[MAX].filp, origfreqs[MAX]);
> + writeval(sysfs_files[MIN].filp, origfreqs[MIN]);
> + writeval(sysfs_files[MAX].filp, origfreqs[MAX]);
> }
>
> load_helper_deinit();
> @@ -652,7 +667,7 @@ igt_main
>
> igt_fixture {
> const int device = drm_get_card();
> - struct junk *junk = stuff;
> + struct sysfs_file *sysfs_file = sysfs_files;
> int ret;
>
> /* Use drm_open_driver to verify device existence */
> @@ -663,16 +678,17 @@ igt_main
> do {
> int val = -1;
> char *path;
> - ret = asprintf(&path, sysfs_base_path, device, junk->name);
> +
> + ret = asprintf(&path, sysfs_base_path, device, sysfs_file->name);
> igt_assert(ret != -1);
> - junk->filp = fopen(path, junk->mode);
> - igt_require(junk->filp);
> - setbuf(junk->filp, NULL);
> + sysfs_file->filp = fopen(path, sysfs_file->mode);
> + igt_require(sysfs_file->filp);
> + setbuf(sysfs_file->filp, NULL);
>
> - val = readval(junk->filp);
> + val = readval(sysfs_file->filp);
> igt_assert(val >= 0);
> - junk++;
> - } while (junk->name != NULL);
> + sysfs_file++;
> + } while (sysfs_file->name != NULL);
>
> read_freqs(origfreqs);
>
> @@ -684,18 +700,22 @@ igt_main
> igt_subtest("basic-api")
> min_max_config(basic_check, false);
>
> + /* Verify the constraints, check if we can reach idle */
> igt_subtest("min-max-config-idle")
> min_max_config(idle_check, true);
>
> + /* Verify the constraints with high load, check if we can reach max */
> igt_subtest("min-max-config-loaded") {
> load_helper_run(HIGH);
> min_max_config(loaded_check, false);
> load_helper_stop();
> }
>
> + /* Checks if we achieve boost using gem_wait */
We should mention this is doing gem_wait on a spinning batch, hence the
boost.
Other than this and the above comment, LGTM.
Acked-by: Vinay Belgaumkar <vinay.belgaumkar at intel.com>
> igt_subtest("waitboost")
> waitboost(drm_fd, false);
>
> + /* Test boost frequency after GPU reset */
> igt_subtest("reset") {
> igt_hang_t hang = igt_allow_hang(drm_fd, 0, 0);
> waitboost(drm_fd, true);
>
More information about the Intel-gfx
mailing list