Re: [PATCH 2/2] tools/power/turbostat: Fix division by zero when TDP calculation fails

From: Len Brown
Date: Mon Dec 01 2025 - 14:14:46 EST


> I'll send you a patch for this later today.

Please try the latest turbostat in my public tree:
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux.git turbostat

The top commit should be this:

commit 4b295ae45d3e6eb4d811c8fc2408b9e4e91c9474 (turbostat, next)
Author: Len Brown <len.brown@xxxxxxxxx>
Date: Sun Nov 30 00:11:22 2025 -0500

tools/power turbostat: Validate that RAPL MSRs really exist

Even though the platform->plat_rapl_msrs enumeration may be accurate,
a VM may deny access to the underlying MSRs.

Probe if PKG_ENERGY is readable and non-zero.
If no, ignore all RAPL MSRs.

Reported-by: Emily Ehlert <ehemily@xxxxxxxxx>
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>