On ma, 2015-11-30 at 16:23 -0800, Bob Paauwe wrote:
> Now that the frequency can drop below the user specified minimum when
> the gpu is idle, add some checking to verify that it really does drop
> down to the RPn frequency in specific cases.
>
> To do this, modify the main test flow to take two 'check' routines
> instead of one. When running the config-min-max-idle subtest make
> use of the second check routine to verify that the frequency drops
> to RPn instead of simply <= user min frequency. For all other
> subtests, use the original check routines for both checks.
>
> Signed-off-by: Bob Paauwe <bob.j.paauwe@xxxxxxxxx>
I don't see the point. The frequency should always drop to the idle
frequency if the GPU is idle, it's not enough that it's below MIN-freq.
So why do we need separate CUR-freq<=MIN-freq and CUR-freq==idle-freq
checks?
> ---
> tests/pm_rps.c | 47 ++++++++++++++++++++++++++++++++++-------------
> 1 file changed, 34 insertions(+), 13 deletions(-)
>
> diff --git a/tests/pm_rps.c b/tests/pm_rps.c
> index f919625..96225ce 100644
> --- a/tests/pm_rps.c
> +++ b/tests/pm_rps.c
> @@ -364,7 +364,7 @@ static int get_hw_rounded_freq(int target)
> return ret;
> }
>
> -static void min_max_config(void (*check)(void), bool load_gpu)
> +static void min_max_config(void (*check)(void), void
> (*check2)(void), bool load_gpu)
> {
> int fmid = (origfreqs[RPn] + origfreqs[RP0]) / 2;
>
> @@ -384,7 +384,7 @@ static void min_max_config(void (*check)(void),
> bool load_gpu)
> writeval(stuff[MAX].filp, origfreqs[RP0]);
> if (load_gpu)
> do_load_gpu();
> - check();
> + check2();
>
> igt_debug("\nIncrease min to midpoint...\n");
> writeval(stuff[MIN].filp, fmid);
> @@ -412,7 +412,7 @@ static void min_max_config(void (*check)(void),
> bool load_gpu)
> writeval(stuff[MIN].filp, origfreqs[RPn]);
> if (load_gpu)
> do_load_gpu();
> - check();
> + check2();
>
> igt_debug("\nDecrease min below RPn (invalid)...\n");
> writeval_inval(stuff[MIN].filp, 0);
> @@ -420,11 +420,11 @@ static void min_max_config(void (*check)(void),
> bool load_gpu)
>
> igt_debug("\nDecrease max to midpoint...\n");
> writeval(stuff[MAX].filp, fmid);
> - check();
> + check2();
>
> igt_debug("\nDecrease max to RPn...\n");
> writeval(stuff[MAX].filp, origfreqs[RPn]);
> - check();
> + check2();
>
> igt_debug("\nDecrease max below RPn (invalid)...\n");
> writeval_inval(stuff[MAX].filp, 0);
> @@ -436,11 +436,11 @@ static void min_max_config(void (*check)(void),
> bool load_gpu)
>
> igt_debug("\nIncrease max to midpoint...\n");
> writeval(stuff[MAX].filp, fmid);
> - check();
> + check2();
>
> igt_debug("\nIncrease max to RP0...\n");
> writeval(stuff[MAX].filp, origfreqs[RP0]);
> - check();
> + check2();
>
> igt_debug("\nIncrease max above RP0 (invalid)...\n");
> writeval_inval(stuff[MAX].filp, origfreqs[RP0] + 1000);
> @@ -461,7 +461,7 @@ static void basic_check(void)
>
> #define IDLE_WAIT_TIMESTEP_MSEC 100
> #define IDLE_WAIT_TIMEOUT_MSEC 10000
> -static void idle_check(void)
> +static void idle_check_min(void)
> {
> int freqs[NUMFREQ];
> int wait = 0;
> @@ -482,6 +482,27 @@ static void idle_check(void)
> igt_debug("Required %d msec to reach cur<=min\n", wait);
> }
>
> +static void idle_check_idle(void)
> +{
> + int freqs[NUMFREQ];
> + int wait = 0;
> +
> + /* Monitor frequencies until cur settles down to min, which
> should
> + * happen within the allotted time */
> + do {
> + read_freqs(freqs);
> + dump(freqs);
> + checkit(freqs);
> + if (freqs[CUR] == freqs[RPn])
> + break;
> + usleep(1000 * IDLE_WAIT_TIMESTEP_MSEC);
> + wait += IDLE_WAIT_TIMESTEP_MSEC;
> + } while (wait < IDLE_WAIT_TIMEOUT_MSEC);
> +
> + igt_assert_eq(freqs[CUR], freqs[RPn]);
> + igt_debug("Required %d msec to reach cur=idle\n", wait);
> +}
> +
> #define LOADED_WAIT_TIMESTEP_MSEC 100
> #define LOADED_WAIT_TIMEOUT_MSEC 3000
> static void loaded_check(void)
> @@ -577,7 +598,7 @@ static void reset(void)
>
> igt_debug("Removing load...\n");
> load_helper_stop();
> - idle_check();
> + idle_check_min();
> }
>
> /*
> @@ -635,7 +656,7 @@ static void blocking(void)
> matchit(pre_freqs, post_freqs);
>
> igt_debug("Removing load...\n");
> - idle_check();
> + idle_check_min();
> }
>
> static void pm_rps_exit_handler(int sig)
> @@ -686,14 +707,14 @@ igt_main
> }
>
> igt_subtest("basic-api")
> - min_max_config(basic_check, false);
> + min_max_config(basic_check, basic_check, false);
>
> igt_subtest("min-max-config-idle")
> - min_max_config(idle_check, true);
> + min_max_config(idle_check_min, idle_check_idle,
> true);
>
> igt_subtest("min-max-config-loaded") {
> load_helper_run(HIGH);
> - min_max_config(loaded_check, false);
> + min_max_config(loaded_check, loaded_check, false);
> load_helper_stop();
> }
>
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