Re: [PATCH 1/3] powernow-k6: disable cache when changing frequency

From: Viresh Kumar
Date: Fri Jan 03 2014 - 00:41:05 EST

On 2 January 2014 23:08, Mikulas Patocka <mpatocka@xxxxxxxxxx> wrote:
> Flushing the cache and changing frequency takes approximatelly 500us. The
> patch increases policy->cpuinfo.transition_latency to that value.

Its not about how fast caches get cleaned but how much time would
be wasted to get them filled again as same data could be required again
which is just flushed out. That would impact performance more than
flushing caches.
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