On 2/18/15 4:38 PM, Andi Kleen wrote:
On Wed, Feb 18, 2015 at 04:33:31PM -0700, David Ahern wrote:
On 2/18/15 11:30 AM, Andi Kleen wrote:
I think Andi mentioned this to me last year -- that instruction
profiling was no longer reliable.
It never was.
Why is that? What about profiling with other hardware counters?
Practically all profiling has skid of some form.
ok, so you meant that only in the context of skid meaning the hit
instruction is off a few (ie., squint backwards at the annotate output).
David
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