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Date: Tue, 25 Aug 2020 14:07:46 -0700 From: "Doug Smythies" <dsmythies@...us.net> To: "'Srinivas Pandruvada'" <srinivas.pandruvada@...ux.intel.com> Cc: "'LKML'" <linux-kernel@...r.kernel.org>, "'Linux PM'" <linux-pm@...r.kernel.org>, "'Rafael J. Wysocki'" <rjw@...ysocki.net> Subject: RE: [PATCH v2 0/5] cpufreq: intel_pstate: Address some HWP-related oddities Hi Srinivas, Thanks for your reply. On 2020.08.25 08:12 Srinivas Pandruvada wrote: > On Mon, 2020-08-24 at 18:00 -0700, Doug Smythies wrote: > > I think there is a disconnect between your written > > description of what is going on and your supporting MSR reads. > > > I reproduced again. > I see the copy paste individual at the first place swapped. Yes, and that had me confused, initially. > I pasted the full output by direct copy - paste from the screen. > > But the issues are still there. Agreed. I didn't try your offline/online of CPU 1 part previously, but did now, and get the same results as you. I did not know that "rdmsr -a 0x774" lists stuff in the order that CPU were last brought on-line. I had assumed the list was in CPU order. Weird. My example (nothing new here, just me catching up. The offline/online order was cpu1, then cpu3, then cpu2): root@s18:/sys/devices/system/cpu# grep . cpu*/cpufreq/energy_performance_preference cpu0/cpufreq/energy_performance_preference:balance_performance cpu1/cpufreq/energy_performance_preference:127 cpu2/cpufreq/energy_performance_preference:125 cpu3/cpufreq/energy_performance_preference:126 cpu4/cpufreq/energy_performance_preference:balance_performance cpu5/cpufreq/energy_performance_preference:balance_performance root@s18:/sys/devices/system/cpu# rdmsr -p 0 0x774 80002e2e root@s18:/sys/devices/system/cpu# rdmsr -p 1 0x774 7f002e2e root@s18:/sys/devices/system/cpu# rdmsr -p 2 0x774 7d002e2e root@s18:/sys/devices/system/cpu# rdmsr -p 3 0x774 7e002e2e root@s18:/sys/devices/system/cpu# rdmsr -p 4 0x774 80002e2e root@s18:/sys/devices/system/cpu# rdmsr -p 5 0x774 80002e2e root@s18:/sys/devices/system/cpu# rdmsr -a 0x774 80002e2e 80002e2e 80002e2e 7f002e2e 7e002e2e 7d002e2e ... Doug
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