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Message-ID: <f40fb4250708161552ub87bf8ve8168eec1b3955e7@mail.gmail.com> Date: Fri, 17 Aug 2007 02:52:03 +0400 From: GolovaSteek <golovasteek@...il.com> To: linux-kernel@...r.kernel.org 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@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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