diff options
| -rw-r--r-- | src/mesa/state_tracker/st_context.h | 2 | ||||
| -rw-r--r-- | src/mesa/state_tracker/st_draw.c | 32 |
2 files changed, 34 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_context.h b/src/mesa/state_tracker/st_context.h index 14b9b018809..95133c7020f 100644 --- a/src/mesa/state_tracker/st_context.h +++ b/src/mesa/state_tracker/st_context.h @@ -193,6 +193,8 @@ struct st_context /** This masks out unused shader resources. Only valid in draw calls. */ uint64_t active_states; + unsigned pin_thread_counter; /* for L3 thread pinning on AMD Zen */ + /* If true, further analysis of states is required to know if something * has changed. Used mainly for shaders. */ diff --git a/src/mesa/state_tracker/st_draw.c b/src/mesa/state_tracker/st_draw.c index eb52d9505b6..5910ffa5bda 100644 --- a/src/mesa/state_tracker/st_draw.c +++ b/src/mesa/state_tracker/st_draw.c @@ -58,6 +58,7 @@ #include "pipe/p_context.h" #include "pipe/p_defines.h" +#include "util/u_cpu_detect.h" #include "util/u_inlines.h" #include "util/u_format.h" #include "util/u_prim.h" @@ -66,6 +67,13 @@ #include "draw/draw_context.h" #include "cso_cache/cso_context.h" +#ifdef PIPE_OS_LINUX +#include <sched.h> +#define HAVE_SCHED_GETCPU 1 +#else +#define sched_getcpu() 0 +#define HAVE_SCHED_GETCPU 0 +#endif /** * Set the restart index. @@ -122,6 +130,30 @@ prepare_draw(struct st_context *st, struct gl_context *ctx) st->gfx_shaders_may_be_dirty) { st_validate_state(st, ST_PIPELINE_RENDER); } + + struct pipe_context *pipe = st->pipe; + + /* Pin threads regularly to the same Zen CCX that the main thread is + * running on. The main thread can move between CCXs. + */ + if (unlikely(HAVE_SCHED_GETCPU && /* Linux */ + /* AMD Zen */ + util_cpu_caps.nr_cpus != util_cpu_caps.cores_per_L3 && + /* no glthread */ + ctx->CurrentClientDispatch != ctx->MarshalExec && + /* driver support */ + pipe->set_context_param && + /* do it occasionally */ + ++st->pin_thread_counter % 512 == 0)) { + int cpu = sched_getcpu(); + if (cpu >= 0) { + unsigned L3_cache = cpu / util_cpu_caps.cores_per_L3; + + pipe->set_context_param(pipe, + PIPE_CONTEXT_PARAM_PIN_THREADS_TO_L3_CACHE, + L3_cache); + } + } } /** |