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cpupower: Fix turbo frequency reporting for pre-Sandy Bridge cores

PATCH In review Ben Hutchings 2 participants 3 messages Apr 10, 2017 – Apr 11, 2017 CPU power monitoring

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PATCH 1/1 cpupower: Fix turbo frequency reporting for pre-Sandy Bridge cores

The switch that conditionally sets CPUPOWER_CAP_HAS_TURBO_RATIO and CPUPOWER_CAP_IS_SNB flags is missing a break, so all cores get both flags set and an assumed base clock of 100 MHz for turbo values.

References: https://bugs.debian.org/859978

Fixes 8fb2e440b223 ("cpupower: Show Intel turbo ratio support via ...")
---
 tools/power/cpupower/utils/helpers/cpuid.c | 1 +
 1 file changed, 1 insertion(+)
tools/power/cpupower/utils/helpers/cpuid.c +1 -0
index 93b0aa74ca03..39c2c7d067bb 100644
@@ -156,6 +156,7 @@ int get_cpu_info(unsigned int cpu, struct cpupower_cpu_info *cpu_info)
 					 */
 			case 0x2C:	/* Westmere EP - Gulftown */
 				cpu_info->caps |= CPUPOWER_CAP_HAS_TURBO_RATIO;
+				break;
 			case 0x2A:	/* SNB */
 			case 0x2D:	/* SNB Xeon */
 			case 0x3A:	/* IVB */
#2 lore raw
Quoted 5 lines · Thomas Renninger

Hi Ben,

good catch, thanks!
Could you resubmit adding my Signed-off-by, please. Rafael could directly pick it up then?

That doesn't make sense. You should add a Signed-off-by if *you* send it on. Otherwise Rafael or I can add an Acked-by.

Quoted 5 lines
Quoted 2 lines

These seem not to make much sense, at least not in the kernel changelog?

I don't see why not.

Ben.

Signature · 2 lines
Ben Hutchings
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