Messages in this thread Patch in this message | | | From | Peng Liu <> | Subject | [PATCH] tools/power turbostat: Fix Bzy_MHz calculation equation | Date | Sat, 7 Oct 2023 13:46:22 +0800 |
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From: Peng Liu <liupeng17@lenovo.com>
To calculate Bzy_MHz, TSC_delta should multiply APERF_delta instead of dividing it.
Signed-off-by: Peng Liu <liupeng17@lenovo.com> --- tools/power/x86/turbostat/turbostat.8 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/power/x86/turbostat/turbostat.8 b/tools/power/x86/turbostat/turbostat.8 index 8f08c3fd498d..1ba6340d3b3d 100644 --- a/tools/power/x86/turbostat/turbostat.8 +++ b/tools/power/x86/turbostat/turbostat.8 @@ -370,7 +370,7 @@ below the processor's base frequency. Busy% = MPERF_delta/TSC_delta -Bzy_MHz = TSC_delta/APERF_delta/MPERF_delta/measurement_interval +Bzy_MHz = TSC_delta*APERF_delta/MPERF_delta/measurement_interval Note that these calculations depend on TSC_delta, so they are not reliable during intervals when TSC_MHz is not running at the base frequency. -- 2.34.1
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