diff options
Diffstat (limited to 'sys/x86/isa/clock.c')
| -rw-r--r-- | sys/x86/isa/clock.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/sys/x86/isa/clock.c b/sys/x86/isa/clock.c index f0016b2..87d906a 100644 --- a/sys/x86/isa/clock.c +++ b/sys/x86/isa/clock.c @@ -246,13 +246,13 @@ getit(void) } static __inline void -delay_tsc(int n) +delay_tsc(int n, uint64_t freq) { uint64_t start, end, now; sched_pin(); start = rdtsc(); - end = start + (tsc_freq * n) / 1000000; + end = start + (freq * n) / 1000000; do { cpu_spinwait(); now = rdtsc(); @@ -290,6 +290,7 @@ void DELAY(int n) { struct timecounter *tc; + uint64_t freq; int delta, prev_tick, tick, ticks_left; #ifdef DELAYDEBUG @@ -298,8 +299,9 @@ DELAY(int n) static int state = 0; #endif - if (tsc_freq != 0) { - delay_tsc(n); + freq = atomic_load_acq_64(&tsc_freq); + if (freq != 0) { + delay_tsc(n, freq); return; } tc = timecounter; |
