AArch64: slow cpuinfo due to redundant loop

The attachment "AArch64-cpuinfo-Remove-redundant-cpu-caps-loop.patch" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

Status changed to 'Confirmed' because the bug affects multiple users.

My 200+ ARM machine fails to commission in MaaS because lshw takes 8 minutes to run. I will try out this patch and see if it speeds up lshw.

Hi,
If it helps, we have an old DEB package at [1].
I think it's based on the lshw version that was used by Trusty or Xenial at that time.

[1] http://linux.enea.com/mos-repos/ubuntu/10.0/pool/main/l/lshw/

I see nobody acted on this, so I sent a PR [1] upstream.
Will update this ticket if it gets pulled.

[1] https://github.com/lyonel/lshw/pull/36

This issue also affects me. With about 10min for lshw it nearly fails MAAS commisioning.

Upstream PR merged.

Thanks. Process to upload.

This bug was fixed in the package lshw - 02.18-0.1ubuntu6

---------------
lshw (02.18-0.1ubuntu6) bionic; urgency=medium

  * AArch64: cpuinfo: Remove redundant cpu caps loop (LP: #1582181)
    (Merged into EZix upstream commit [20cda772])

 -- Ike Panhc <email address hidden> Wed, 21 Mar 2018 14:42:13 +0800

Hello Alexandru, or anyone else affected,

Accepted lshw into artful-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/lshw/02.18-0.1ubuntu4.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed.Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-artful to verification-done-artful. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-artful. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Hello Alexandru, or anyone else affected,

Accepted lshw into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/lshw/02.17-1.1ubuntu3.5 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed.Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-xenial to verification-done-xenial. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-xenial. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

lshw in xenial-proposed fixes this issue.

ubuntu@recht:~$ time lshw > /dev/null;dpkg --list | grep lshw
WARNING: you should run this program as super-user.
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.

real 1m50.371s
user 1m50.240s
sys 0m0.104s
ii lshw 02.17-1.1ubuntu3.4 arm64 information about hardware configuration

ubuntu@recht:~$ time lshw > /dev/null;dpkg --list | grep lshw
WARNING: you should run this program as super-user.
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.

real 0m2.548s
user 0m2.460s
sys 0m0.084s
ii lshw 02.17-1.1ubuntu3.5 arm64 information about hardware configuration

lshw in artful-proposed fixes this issue.

ubuntu@recht:~$ time lshw > /dev/null ; dpkg --list | grep lshw
WARNING: you should run this program as super-user.
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.

real 2m10.793s
user 2m10.589s
sys 0m0.192s
ii lshw 02.18-0.1ubuntu4 arm64 information about hardware configuration

ubuntu@recht:~$ time lshw > /dev/null ; dpkg --list | grep lshw
WARNING: you should run this program as super-user.
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.

real 0m3.210s
user 0m2.984s
sys 0m0.221s
ii lshw 02.18-0.1ubuntu4.1 arm64 information about hardware configuration

The verification of the Stable Release Update for lshw has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

This bug was fixed in the package lshw - 02.17-1.1ubuntu3.5

---------------
lshw (02.17-1.1ubuntu3.5) xenial; urgency=medium

  * AArch64: cpuinfo: Remove redundant cpu caps loop (LP: #1582181)
    (Merged into EZix upstream commit [20cda772])

 -- Ike Panhc <email address hidden> Wed, 21 Mar 2018 13:12:21 +0800

This bug was fixed in the package lshw - 02.18-0.1ubuntu4.1

---------------
lshw (02.18-0.1ubuntu4.1) artful; urgency=medium

  * AArch64: cpuinfo: Remove redundant cpu caps loop (LP: #1582181)
    (Merged into EZix upstream commit [20cda772])

 -- Ike Panhc <email address hidden> Wed, 21 Mar 2018 14:37:08 +0800