Feature #13688
closed
Want support for AMD Zen 3 Milan CPC Events
100%
Description
As there's now public documentation on AMD's website about Zen 3 Milan CPU performance counters, we should update the pmc data. There are some differences that I've noticed between Milan and Vermeer so I haven't gone through and enabled Ryzen related Zen 3 parts as of this time. Hopefully AMD publishes public docs soon.
Updated by Robert Mustacchi 7 months ago
To test this I used a Milan system and looked at a couple things:
1. Made sure that we saw expected stats in cpustat -h
2. Bound a thread to a specific cpu and did a shell while :; do :; done loop. I then enabled the PAPI total cycles counter and made sure that the value for the CPU in question tracked the approximate frequency and was for the right CPU!
I then went back to a Rome system and verified that the counters seen via cpustat -h hadn't changed.
Updated by Electric Monk 7 months ago
- Status changed from New to Closed
- % Done changed from 70 to 100
git commit 281939df320dc275543124ebb96b5a9415c503be
commit 281939df320dc275543124ebb96b5a9415c503be
Author: Robert Mustacchi <rm@fingolfin.org>
Date: 2021-05-06T19:18:03.000Z
13688 Want support for AMD Zen 3 Milan CPC Events
Reviewed by: Sean Klein <sean@oxidecomputer.com>
Reviewed by: Patrick Mooney <pmooney@pfmooney.com>
Approved by: Dan McDonald <danmcd@joyent.com>