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Subject[PATCH 2/3] perf/x86/rapl: Use standard Energy Unit for SPR Dram RAPL domain
Date
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>
Tested-by: Wang Wendy <wendy.wang@intel.com>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
---
arch/x86/events/rapl.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
index 77e3a47af5ad..7d8db681880d 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:
--
2.25.1
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