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On this system I also checked MAX_PKG_C_STATE, and it is 3. Thanks, -kin On 3/6/22 6:35 AM, Artem Bityutskiy wrote: > On Sat, 2022-03-05 at 17:20 +0800, Chen Yu wrote: >> Hi Cho, >> On Fri, Mar 04, 2022 at 01:35:17PM -0800, Kin Cho wrote: >>> Hi, >>> >>> This patch (25368d7cefcd87a94ccabcc6f9f31796607bbe4e) has affected >>> Sapphire >>> Rapids support. >>> Specifically Pkg%pc2 and Pkg%pc6 are now missing on Sapphire Rapids >>> (with >>> package C6 retention). >>> See below for a diff of turbostat --list output with and without >>> 25368d7. >>> >> My guess is that the max limited package c-state exposed might be '3' >> rather than '2'. >> Artem has previously found this issue on ICX and there is a patch: >> https://patchwork.kernel.org/project/linux-pm/patch/20211004105224.3145916-1-dedekind1@gmail.com/ >> >> would you please help check if that helps? > > Yes, this patch fixes the problem. > > Rafael, would you please take a look and possibly pick it? Thanks! > > Artem. >