On Wed, Jul 29, 2020 at 2:59 PM Artem Tim <ego.cordatus@xxxxxxxxx> wrote: > > I am experimenting now with various compression in Fedora and noticed slowdowns with compression only for mock at this moment. On 4-core CPU building in mock with zstd:1 on HDD is slower. Also 'autodefrag' and 'space_cache=v2' options enabled on HDD. Is there anything else going on at the same time? Could you file a bug against the kernel and in the Assignee field, replace with fedora-kernel-btrfs@xxxxxxxxxxxxxxxxx and describe the setup with simple reproduce steps (as in, i never use mock) so the we can do some A/B testing? I have a ~9 year old core i7, and zstd:1 single thread throughput is definitely faster for both reads and writes than the SSD that's in it, let alone the original HDD that was in it. It should be faster with zstd:1 if anything. I expect a compile means 100% writes are new file writes and not many, if any at all, writes within a file. That is what would trigger autodefrag. Thanks, -- Chris Murphy _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
