From: Marek Olšák <[email protected]>
Reserve one core for other things (like draw calls).
---
src/gallium/drivers/radeonsi/si_pipe.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/src/gallium/drivers/radeonsi/si_pipe.c
b/src/gallium/drivers/radeonsi/si_pipe.c
index de4e5da..4704304 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -874,22 +874,25 @@ struct pipe_screen *radeonsi_screen_create(struct
radeon_winsys *ws)
si_init_screen_state_functions(sscreen);
if (!r600_common_screen_init(&sscreen->b, ws) ||
!si_init_gs_info(sscreen) ||
!si_init_shader_cache(sscreen)) {
FREE(sscreen);
return NULL;
}
- /* Only enable as many threads as we have target machines and CPUs. */
+ /* Only enable as many threads as we have target machines, but at most
+ * the number of CPUs - 1 if there is more than one.
+ */
num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
+ num_cpus = MAX2(1, num_cpus - 1);
num_compiler_threads = MIN2(num_cpus, ARRAY_SIZE(sscreen->tm));
if (!util_queue_init(&sscreen->shader_compiler_queue, "si_shader",
32, num_compiler_threads)) {
si_destroy_shader_cache(sscreen);
FREE(sscreen);
return NULL;
}
si_handle_env_var_force_family(sscreen);
--
2.7.4
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