This is a note to let you know that I've just added the patch titled
tools/power turbostat: Fix Bzy_MHz documentation typo
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tools-power-turbostat-fix-bzy_mhz-documentation-typo.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 9675bb2c654224739537ca2196ef70b66551dd84
Author: Peng Liu <liupeng17@xxxxxxxxxx>
Date: Sat Oct 7 13:46:22 2023 +0800
tools/power turbostat: Fix Bzy_MHz documentation typo
[ 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@xxxxxxxxxx>
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/power/x86/turbostat/turbostat.8 b/tools/power/x86/turbostat/turbostat.8
index a6db83a88e852..25a560c41321d 100644
--- a/tools/power/x86/turbostat/turbostat.8
+++ b/tools/power/x86/turbostat/turbostat.8
@@ -318,7 +318,7 @@ 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.
