diff options
Diffstat (limited to 'lib/libthr/thread/thr_pspinlock.c')
| -rw-r--r-- | lib/libthr/thread/thr_pspinlock.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/lib/libthr/thread/thr_pspinlock.c b/lib/libthr/thread/thr_pspinlock.c index ec3d68b..561ac26 100644 --- a/lib/libthr/thread/thr_pspinlock.c +++ b/lib/libthr/thread/thr_pspinlock.c @@ -104,13 +104,17 @@ _pthread_spin_lock(pthread_spinlock_t *lock) count = SPIN_COUNT; while ((ret = THR_UMTX_TRYLOCK(curthread, &lck->s_lock)) != 0) { while (lck->s_lock) { -#ifdef __i386__ - /* tell cpu we are spinning */ - __asm __volatile("pause"); -#endif - if (--count <= 0) { - count = SPIN_COUNT; + if (_thr_smp_cpus <= 1) { _pthread_yield(); + } else { +#if defined(__i386__) || defined(__x86_64__) + /* tell cpu we are spinning */ + __asm __volatile("pause"); +#endif + if (--count <= 0) { + count = SPIN_COUNT; + _pthread_yield(); + } } } } |
