Re: [RFC PATCH 1/3] Unified trace buffer

[Steven Rostedt]

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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