Re: latency error (~2ms) with nanosleep
From: Chris Friesen
Date: Mon Jun 13 2005 - 11:51:39 EST
quade wrote:
Playing around with the (simple) measurement of latency-times
I noticed, that the systemcall "nanosleep" has always a minimal
latency from about ~2ms (haven't run it all night, so...). It
seems to be a systematical error.
Known issue. The x86 interrupt usually has a period of slightly less
than a ms. It will therefore generally add nearly a whole ms to ensure
that it does not ever wait for *less* than specified.
Chris
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/