11:27 <zapb__> PaulFertser, fyi, Gerrit is again quite slow

11:28 <zapb__> Response time is about 10-20 seconds from time to time during the last 2 hours or so

11:28 <PaulFertser> zapb__: that's odd, especially given that I added that workaround to clean shit to be run daily :(

11:30 <PaulFertser> Currently the CPU is at 100 % but ~40 of it is with nice 19, so should be preempted for anything more important...

11:32 <PaulFertser> But I also see iowait spiking, hm, probably there should be a way to demote all jenkins IO operations somehow.

11:32 <zapb__> PaulFertser, 100 % due to Jenkins?

11:33 <PaulFertser> zapb__: yes, the build is currently running so it's using all it can, but nice 19 should really take care of it. So now I suspect I/O being the bottleneck.

11:39 <PaulFertser> zapb__: let's see if changing block device scheduler to "none" improves things. The build is still ongoing and I made no other changes.

11:40 <PaulFertser> Opening changes is quite snappy for me atm.

11:42 <PaulFertser> It was mq-deadline before and I changed it on "vda" device.

11:43 <Haohmaru> nice 19?

11:44 <Haohmaru> snappy-no-more

11:44 <PaulFertser> Haohmaru: https://en.wikipedia.org/wiki/Nice_(Unix)

11:44 <olerem> PaulFertser: do build and jenkins run within same cgroup?

11:46 <PaulFertser> olerem: I know what you're hinting it, the autogrouping feature which is enabled by default, hm, I need to check.

11:46 <PaulFertser> I should have taken care of it.

11:46 <PaulFertser> But good point.

11:47 <PaulFertser> (modern Linux basically ignores "nice" values by default unless they run in same shell session (layman explanation))

11:47 <PaulFertser> kernel.sched_autogroup_enabled = 0

11:48 <PaulFertser> I think that's how Debian has it by default, that's why.

11:51 <olerem> PaulFertser: you can use systemd-cgls and systemd-cgtop to get better idea on cgroup slices

12:16 <PaulFertser> Feel like changing the io scheduler to "none" really made helluva difference!

12:17 <PaulFertser> The Geehy MCU families do not look bad a all, hm.

12:48 <PaulFertser> zapb__: I'd say Gerrit is responsive now

12:59 <Haohmaru> APM32F407VGT6 doesn't look bad on paper

17:45 <zapb__> PaulFertser, thanks

17:46 <PaulFertser> zapb__: I'm not sure I tried opening different random changes, adding review etc, it was pretty fast even though the builds were still ongoing. Please ping me if it gets annoying for you again.

17:48 <zapb__> PaulFertser, yep :)