Messages in this thread | | | Date | Thu, 25 Sep 2008 12:32:54 -0400 (EDT) | From | Steven Rostedt <> | Subject | Re: [RFC PATCH 1/3] Unified trace buffer |
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On Thu, 25 Sep 2008, Mathieu Desnoyers wrote: > The problem with sched_clock is that it gives a 1 HZ timestamp accuracy > for events happening across different CPUs. Within this 1 HZ range, it > uses the TSC and clip when it reaches a max. Good enough for scheduler > or for tracing events on a single CPU, but I think it is not exactly > what we need to reorder events happening across CPUs. >
Hmm,
sched_clock gives ns accuracy unless the tsc is disabled. And in that case, we don't have any CPU clock :-/
-- Steve
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