Messages in this thread | | | Date | Fri, 17 Aug 2007 02:52:03 +0400 | From | GolovaSteek <> | Subject | nanosleep() accuracy |
| |
Hello! I need use sleep with accurat timing. I use 2.6.21 with rt-prempt patch. with enabled rt_preempt, dyn_ticks, and local_apic But
req.tv_nsec = 300000; req.tv_sec = 0; nanosleep(&req,NULL)
make pause around 310-330 microseconds.
I tried to understend how work nanosleep(), but it not depends from jiffies and from smp_apic_timer_interrupt.
When can accuracy be lost? And how are process waked up?
GolovaSteek - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |