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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: bcfd218b66 ("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
This commit is contained in:
Zhang Rui 2022-09-24 13:47:37 +08:00 committed by Peter Zijlstra
parent 4b18cb3f74
commit 80275ca9e5
1 changed files with 1 additions and 5 deletions
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6
arch/x86/events/rapl.c
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@ -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: