On Tue, Nov 17, 2015 at 12:24:13PM +0200, Joonas Lahtinen wrote:
> CLOCK_MONOTONIC_RAW is not affected by NTP, so it should be THE clock
> used for timing execution of tests.
>
> Cc: Thomas Wood <thomas.wood@xxxxxxxxx>
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Signed-off-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> ---
> lib/igt_core.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/lib/igt_core.c b/lib/igt_core.c
> index 04a0ab2..5a5b1a9 100644
> --- a/lib/igt_core.c
> +++ b/lib/igt_core.c
> @@ -341,10 +341,15 @@ static void gettime(struct timespec *ts)
> {
> memset(ts, 0, sizeof(*ts));
>
> +#ifdef CLOCK_MONOTONIC_RAW
> + if (!clock_gettime(CLOCK_MONOTONIC_RAW, ts))
> + return;
> +#endif
> #ifdef CLOCK_MONOTONIC_COARSE
> - if (clock_gettime(CLOCK_MONOTONIC_COARSE, ts))
> + if (!clock_gettime(CLOCK_MONOTONIC_COARSE, ts))
> + return;
> #endif
> - clock_gettime(CLOCK_MONOTONIC, ts);
> + clock_gettime(CLOCK_MONOTONIC, ts);
Would it be worth doing
static clock_t clock = -1;
if (clock_gettime(clock, ts) == 0)
return;
#ifdef CLOCK_MONOTONIC_RAW
if (clock_gettime(clock = CLOCK_MONOTONIC_RAW, ts) == 0)
return;
#endif
...
?
Anyway,
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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