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authorZhang Rui <rui.zhang@intel.com>2022-09-24 08:47:37 +0300
committerPeter Zijlstra <peterz@infradead.org>2022-11-02 14:22:05 +0300
commit80275ca9e525c198c7efe045c4a6cdb68a2ea763 (patch)
tree8cfea5dd69341cffd026d6486d2b73e3f3cad325 /arch
parent4b18cb3f74dcfc183c2434e17bfce09ce6302e37 (diff)
downloadlinux-80275ca9e525c198c7efe045c4a6cdb68a2ea763.tar.xz
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 <rui.zhang@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Kan Liang <kan.liang@linux.intel.com> Tested-by: Wang Wendy <wendy.wang@intel.com> Link: https://lkml.kernel.org/r/20220924054738.12076-3-rui.zhang@intel.com
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/events/rapl.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
index fea544e5842a..a829492bca4c 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: