diff options
| author | Marek Olšák <marek.olsak@amd.com> | 2020-03-27 08:20:51 -0400 |
|---|---|---|
| committer | Marek Olšák <marek.olsak@amd.com> | 2020-03-30 23:57:52 -0400 |
| commit | 6e672074dd1f3c105396a9d7a9bc35ea785569c9 (patch) | |
| tree | 13745159d19527a82ff2c864742bf069ff37e999 | |
| parent | 4df3c7a2079bc6d11149fa42ff0ca27ea70a7942 (diff) | |
st/mesa: add environment variable pin_app_thread for faster glthread on AMD Zen
Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4369>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4369>
| -rw-r--r-- | src/gallium/auxiliary/util/u_helpers.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_helpers.c b/src/gallium/auxiliary/util/u_helpers.c index 5e5eeedbf45..31b7d533952 100644 --- a/src/gallium/auxiliary/util/u_helpers.c +++ b/src/gallium/auxiliary/util/u_helpers.c @@ -192,6 +192,16 @@ util_pin_driver_threads_to_random_L3(struct pipe_context *ctx, /* Do the same for the upper level thread if there is any (e.g. glthread) */ if (upper_thread) util_pin_thread_to_L3(*upper_thread, cache, util_cpu_caps.cores_per_L3); + + /* Optionally pin the application thread to the same L3 to get maximum + * performance with glthread on AMD Zen. (this function is only called + * with glthread) This is used to estimate and remove the overhead of + * Infinity Fabric between L3 caches. + */ +#if defined(HAVE_PTHREAD) + if (debug_get_bool_option("pin_app_thread", false)) + util_pin_thread_to_L3(pthread_self(), cache, util_cpu_caps.cores_per_L3); +#endif } /* This is a helper for hardware bring-up. Don't remove. */ |