diff options
Diffstat (limited to 'rts/Stats.c')
| -rw-r--r-- | rts/Stats.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/rts/Stats.c b/rts/Stats.c index 282e799d23..895ff3f040 100644 --- a/rts/Stats.c +++ b/rts/Stats.c @@ -523,10 +523,18 @@ stat_endGC (Capability *cap, gc_thread *initiating_gct, W_ live, W_ copied, W_ s initiating_gct->gc_start_elapsed - initiating_gct->gc_sync_start_elapsed; stats.gc.elapsed_ns = current_elapsed - initiating_gct->gc_start_elapsed; stats.gc.cpu_ns = 0; - for (unsigned int i=0; i < par_n_threads; i++) { - gc_thread *gct = gc_threads[i]; - ASSERT(gct->gc_end_cpu >= gct->gc_start_cpu); - stats.gc.cpu_ns += gct->gc_end_cpu - gct->gc_start_cpu; + // see Note [n_gc_threads] + // par_n_threads is set to n_gc_threads at the single callsite of this + // function + if (par_n_threads == 1) { + ASSERT(initiating_gct->gc_end_cpu >= initiating_gct->gc_start_cpu); + stats.gc.cpu_ns += initiating_gct->gc_end_cpu - initiating_gct->gc_start_cpu; + } else { + for (unsigned int i=0; i < par_n_threads; i++) { + gc_thread *gct = gc_threads[i]; + ASSERT(gct->gc_end_cpu >= gct->gc_start_cpu); + stats.gc.cpu_ns += gct->gc_end_cpu - gct->gc_start_cpu; + } } } // ------------------------------------------------- |