We have completed analysis on cloud instances. We have not managed to reproduce the drastic "firefox startup went from 15s to 6s (!) on Igors reference hardware" result. Most of our results are within insignificant low single % differences, with some improved results, and with some good improvements on very beefy machines.
What is "Igors reference hardware"? Overall there is nothing negative observed (OOM, extreme memory usage, failure to boot small instances). We can consider to change the config in Kinetic, hwe, and oem kernels. This will cover majority of client/desktop/laptop/cloud instances. -- 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/1980861 Title: Please enable CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU Status in Snappy: New Status in linux package in Ubuntu: Incomplete Bug description: The snapd/desktop/advocacy team are investigating the startup performance of running snaps. While doing this and comparing various distros (fedora, opensuse, ubuntu) on Igors reference hardware we noticed that fedora is substantially faster at starting snaps. After some research it turns out that they use the CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU=y option when we use CONFIG_SQUASHFS_DECOMP_SINGLE. I build^Whacked a test kernel in my ppa:mvo/tmp PPA that just changes this one option (https://paste.ubuntu.com/p/NvS4GQjnSp/) and with that the first run firefox startup went from 15s to 6s (!) on Igors reference hardware. Given the dramatic performance improvements we would like to get this option switched. However we need to be careful and double check that the results from https://bugs.launchpad.net/snappy/+bug/1636847 are no longer an issue - back in 2016 the kernel team swtich to _DECOMP_SINGLE because just mounting a snap would use up 131Mb or memory(!). To manage notifications about this bug go to: https://bugs.launchpad.net/snappy/+bug/1980861/+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
