On Wed, 2006-06-21 at 22:51 -0400, Lee Revell wrote:
> How can the latency tracer be reporting 1898us max latency while the
> trace is of a 12us latency? This must be a bug, correct?
I've found the bug. The latency tracer uses get_cycles() for
timestamping, which uses rdtsc, which is unusable for timing on dual
core AMD64 machines due to the well known "unsynced TSCs" hardware bug.
Would a patch to convert the latency tracer to use gettimeofday() be
acceptable?
Lee
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