On Wed, Nov 24, 2021 at 06:10:18PM +0900, Dominique Martinet wrote: > > Please try with the following file: > > > > # /etc/systemd/system/plocate-updatedb.service.d/limits.conf > > [Service] > > CPUAccounting=yes > > CPUQuota=20% > > > > (then 'sudo systemctl daemon-reload && sudo systemctl restart plocate-updatedb'). > > I think this could work. > > That's a nice one. > > For my particular laptop, with governor=performance I'm cutting it too > close to fan being audible (and firefox etc also regularily kicks it > in), so I'm not surprised even with CPUQuota=20% it's enough to be > audible, albeit at a lower level than full throttle (something like +5° > instead of +10-15 from where core temp usually stands, that makes a > difference to fan RPM) > > With governor=powersave though it's really worlds appart, no CPUQuota > immediately scales up to close to the max and heats just like > performance would but with this I barely see any difference from not > doing anything, cpufreq stays < 1GHz and heat stays way down. > > The consequence of that is it takes much longer to complete because the > clock is down: what previously normally took ~55s real for ~27s of CPU > time now takes 7m10 for 85s of CPU time -- but honestly I don't care how > long this takes if it's not noticeable, this is perfect. Thanks again! That's a really long time… 55/27 s seems fairly standard, e.g. I get 43/22 s with a 256 GB SATA disk. But 440/85 s is quite a bit worse. > Steinar would you consider adding this to the upstream service file? I don't think this qualifies as a good default. I would consider it a hack to fix a local hardware problem. Fans in a laptop simply must not be loud enough to be annoying. > (Zbigniew, does systemd just ignore the setting on systems where cpu > accounting has not been enabled? iirc some distros still have it off and > upstream might want to provide defaults that work everywhere) > > I would have suggested also adding Nice=5 or something but I don't think > it's required with this. I think that with IOSchedulingClass=idle, niceness doesn't matter anymore. Zbyszek _______________________________________________ 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 Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
