From: Zhang Rui Date: Sat, 24 Sep 2022 05:47:37 +0000 (+0800) Subject: perf/x86/rapl: Use standard Energy Unit for SPR Dram RAPL domain X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=80275ca9e525c198c7efe045c4a6cdb68a2ea763;p=linux.git perf/x86/rapl: Use standard Energy Unit for SPR Dram RAPL domain Intel Xeon servers used to use a fixed energy resolution (15.3uj) for Dram RAPL domain. But on SPR, Dram RAPL domain follows the standard energy resolution as described in MSR_RAPL_POWER_UNIT. Remove the SPR Dram energy unit quirk. Fixes: bcfd218b6679 ("perf/x86/rapl: Add support for Intel SPR platform") Signed-off-by: Zhang Rui Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Kan Liang Tested-by: Wang Wendy Link: https://lkml.kernel.org/r/20220924054738.12076-3-rui.zhang@intel.com --- diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c index fea544e5842a1..a829492bca4c1 100644 --- a/arch/x86/events/rapl.c +++ b/arch/x86/events/rapl.c @@ -619,12 +619,8 @@ static int rapl_check_hw_unit(struct rapl_model *rm) case RAPL_UNIT_QUIRK_INTEL_HSW: rapl_hw_unit[PERF_RAPL_RAM] = 16; break; - /* - * SPR shares the same DRAM domain energy unit as HSW, plus it - * also has a fixed energy unit for Psys domain. - */ + /* SPR uses a fixed energy unit for Psys domain. */ case RAPL_UNIT_QUIRK_INTEL_SPR: - rapl_hw_unit[PERF_RAPL_RAM] = 16; rapl_hw_unit[PERF_RAPL_PSYS] = 0; break; default: