- /* 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_threads = sysconf(_SC_NPROCESSORS_ONLN);
- num_threads = MAX2(1, num_threads - 1);
- num_compiler_threads = MIN2(num_threads, ARRAY_SIZE(sscreen->compiler));
- num_compiler_threads_lowprio =
- MIN2(num_threads, ARRAY_SIZE(sscreen->compiler_lowp));
+ /* Determine the number of shader compiler threads. */
+ hw_threads = sysconf(_SC_NPROCESSORS_ONLN);
+
+ if (hw_threads >= 12) {
+ num_comp_hi_threads = hw_threads * 3 / 4;
+ num_comp_lo_threads = hw_threads / 3;
+ } else if (hw_threads >= 6) {
+ num_comp_hi_threads = hw_threads - 2;
+ num_comp_lo_threads = hw_threads / 2;
+ } else if (hw_threads >= 2) {
+ num_comp_hi_threads = hw_threads - 1;
+ num_comp_lo_threads = hw_threads / 2;
+ } else {
+ num_comp_hi_threads = 1;
+ num_comp_lo_threads = 1;
+ }
+
+ num_comp_hi_threads = MIN2(num_comp_hi_threads,
+ ARRAY_SIZE(sscreen->compiler));
+ num_comp_lo_threads = MIN2(num_comp_lo_threads,
+ ARRAY_SIZE(sscreen->compiler_lowp));