[PATCH AUTOSEL 6.6 03/29] tools/power turbostat: Fix Bzy_MHz documentation typo

Sasha Levin
2024-04-22T23:56:16Z

From: Peng Liu <liupeng17@lenovo.com>

[ Upstream commit 0b13410b52c4636aacb6964a4253a797c0fa0d16 ]

The code calculates Bzy_MHz by multiplying TSC_delta * APERF_delta/MPERF_delta
The man page erroneously showed that TSC_delta was divided.

Signed-off-by: Peng Liu <liupeng17@lenovo.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 8f08c3fd498d5..1ba6340d3b3da 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.
--
2.43.0