On 13.10.2020 05:02, Igor Druzhinin wrote: > From: Chen Yu <yu.c.c...@intel.com> > > On ICX platform, the C1E auto-promotion is enabled by default. > As a result, the CPU might fall into C1E more offen than previous > platforms. So disable C1E auto-promotion and expose C1E as a separate > idle state. > > Beside C1 and C1E, the exit latency of C6 was measured > by a dedicated tool. However the exit latency(41us) exposed > by _CST is much smaller than the one we measured(128us). This > is probably due to the _CST uses the exit latency when woken > up from PC0+C6, rather than PC6+C6 when C6 was measured. Choose > the latter as we need the longest latency in theory. > > Signed-off-by: Chen Yu <yu.c.c...@intel.com> > Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com> > [Linux commit a472ad2bcea479ba068880125d7273fc95c14b70] > Signed-off-by: Igor Druzhinin <igor.druzhi...@citrix.com>
Acked-by: Jan Beulich <jbeul...@suse.com>
