On Wed, 9 Jun 2010, Sarin, Suseelan wrote: > Hi All, > > My real-time program has a thread which needs to run at every 2ms. I > want to calculate the latency of this thread and I am using > clock_gettime for this. I am bit confused here that whether I can do > this. My doubt is, if the system is loaded to the extend that an RT > task can have considerable latency, can I trust the time read from the > high resolution timer of the system? Yes, it's accurate. cyclictest relies on that as well. > Also, with these measurements, I am seeing a ~5msec latency. Is there > a way I can exactly point out the reason for this latency? Tracing. See cyclictest.c for how that's done. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
