eval: Don't oversubscribe the CPU by default

tavianator · Jul 11, 2023 · 1c76857 · 1c76857
1 parent 7393174
commit 1c76857
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/src/eval.c b/src/eval.c
@@ -1548,8 +1548,8 @@ static int infer_fdlimit(const struct bfs_ctx *ctx, int limit) {
 static int infer_nproc(void) {
  long nproc = sysconf(_SC_NPROCESSORS_ONLN);
 
- if (nproc < 0) {
- nproc = 0;
+ if (nproc < 1) {
+ nproc = 1;
  } else if (nproc > 8) {
  // Not much speedup after 8 threads
  nproc = 8;
@@ -1651,7 +1651,7 @@ int bfs_eval(const struct bfs_ctx *ctx) {
  if (ctx->threads > 0) {
  nthreads = ctx->threads - 1;
  } else {
- nthreads = infer_nproc();
+ nthreads = infer_nproc() - 1;
  }
 
  struct bftw_args bftw_args = {