On 13.01.2014 16:23, Alexey Dokuchaev wrote:
On Thu, Jan 09, 2014 at 10:45:38AM +0000, Alexander Motin wrote:
New Revision: 260474
URL: http://svnweb.freebsd.org/changeset/base/260474
Log:
MFC r259197:
Do not DELAY() for P-state transition unless we want to see the result.
Intel manual says: "If a transition is already in progress, transition to
a new value will subsequently take effect. Reads of IA32_PERF_CTL determine
the last targeted operating point." So seems it should be fine to just
trigger wanted transition and go. Linux does the same.
Modified:
stable/9/sys/x86/cpufreq/est.c
It looks like stable/8 can also benefit from this commit. Mind making one?
Done.
--
Alexander Motin
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