I have uploaded further data now to https://people.canonical.com/~philroche/20230824-manticl-minimal- LP2032933/server-metrics/ with kernelmodules, kernelconfig, services, timers etc. for each of the three images being inspected. This additional data was gathered with a modified fork of the `server-test- scripts` repo @ https://github.com/philroche/server-test- scripts/blob/feature/local-lxc-image-execution-additional-data- gathering/metric-server-simple/metric-server-simple.sh.
It seems that most of the mem and process increase is attributed to the kernel change and we know that this was a conscious decision with the following reported bugs supporting that decision. * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2006488 * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1931841 * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1685291 Given the above I feel what we can work on is whether any of the process/modules introduced by the switch to the generic kernel should be omitted for the minimal images. The best, easiest source of this information is the data gathered from the latest image with both the generic kernel and the switch to the new minimal seed - https://people.canonical.com/~philroche/20230824-manticl- minimal-LP2032933/server-metrics/20230821.1-after-kernel-change-after- seed-change-mantic-minimal-cloudimg-amd64-data-f93870221eb8/ @seth-arnold You highlighted `ksmd`. Are there any others that concern you. @paelzer Are you happy to adjust your regression testing/metrics gathering to increase the memory required knowing that it was a conscious decision to switch kernel and incur the performance hit for the benefit of using a kernel with more support and less reported bugs? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2032933 Title: Mantic (23.10) minimal images increase in memory consumption, port usage and processes running Status in cloud-images: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: The Mantic (Ubuntu 23.10) images are undergoing some big changes prior to 23.10 release in October. This is a devel release so this is the perfect time to be making these changes but we are noticing some changes that were not expected. This bug is to track the unexpected changes and discuss/resolve these. The changes that have been made to mantic minimal: * Move to the linux-generic kernel from the linux-kvm kernel * This also involved removal of the virtio-blk driver, which is the default for QEMU and OpenStack, but this is being restored in an upcoming 6.5 mantic kernel and is being trakced @ https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2030745 * Move to using minimal-cloud seed - see https://ubuntu-archive-team.ubuntu.com/seeds/ubuntu.mantic/cloud-minimal * No longer installing Recommends packages * No initramfs fallback for boot - only initramfsless boot The latest mantic minimal images are available @ http://cloud- images.ubuntu.com/minimal/daily/mantic/ and are also available in the public clouds. A package name manifest diff can be seen @ https://pastebin.ubuntu.com/p/rRd6STnNmK/ We have had reports of higher memory usage on an idle system, higher number of ports open on an idle system and higher number of process running on a idle system. To help with debugging I have built and uploaded the following images and package manifests to https://people.canonical.com/~philroche/20230824-manticl-minimal- LP2032933/ * 20230618-before-kernel-change-before-seed-change-mantic-minimal-cloudimg-amd64 * Before kernel change and before seed change * 20230824-after-kernel-change-before-seed-change-mantic-minimal-cloudimg-amd64 * After kernel change and before seed change * 20230821.1-after-kernel-change-after-seed-change-mantic-minimal-cloudimg-amd64 * After kernel change and after seed change To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-images/+bug/2032933/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
