Public bug reported:
With 5.13.0-52-generic, "perf list" includes the following events:
data fabric:
dram_channel_data_controller_0
[Unit: amd_df]
dram_channel_data_controller_1
[Unit: amd_df]
dram_channel_data_controller_2
[Unit: amd_df]
dram_channel_data_controller_3
[Unit: amd_df]
...
With 5.15.0-46-generic the events are missing. This is occurring on Epyc
7003 processors (family 25, model 1, stepping 1).
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-tools-5.15.0-46-generic 5.15.0-46.49~20.04.1
ProcVersionSignature: Ubuntu 5.15.0-46.49~20.04.1-generic 5.15.39
Uname: Linux 5.15.0-46-generic x86_64
NonfreeKernelModules: nvidia_peermem nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
CasperMD5CheckResult: skip
Date: Wed Aug 24 12:08:11 2022
SourcePackage: linux-hwe-5.15
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-hwe-5.15 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal uec-images
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Packages, which is subscribed to linux-hwe-5.15 in Ubuntu.
https://bugs.launchpad.net/bugs/1987522
Title:
Regression: missing Zen 3 data fabric perf events
Status in linux-hwe-5.15 package in Ubuntu:
New
Bug description:
With 5.13.0-52-generic, "perf list" includes the following events:
data fabric:
dram_channel_data_controller_0
[Unit: amd_df]
dram_channel_data_controller_1
[Unit: amd_df]
dram_channel_data_controller_2
[Unit: amd_df]
dram_channel_data_controller_3
[Unit: amd_df]
...
With 5.15.0-46-generic the events are missing. This is occurring on
Epyc 7003 processors (family 25, model 1, stepping 1).
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-tools-5.15.0-46-generic 5.15.0-46.49~20.04.1
ProcVersionSignature: Ubuntu 5.15.0-46.49~20.04.1-generic 5.15.39
Uname: Linux 5.15.0-46-generic x86_64
NonfreeKernelModules: nvidia_peermem nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
CasperMD5CheckResult: skip
Date: Wed Aug 24 12:08:11 2022
SourcePackage: linux-hwe-5.15
UpgradeStatus: No upgrade log present (probably fresh install)
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https://bugs.launchpad.net/ubuntu/+source/linux-hwe-5.15/+bug/1987522/+subscriptions
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