Performance degradation after compiling large projects

[diver]

x86_64 hrev52309 but it's been the case for a long time.

After compiling anything large like Qt or LibreOffice which stresses the OS a lot I observe a huge performance drop, apps starts longer, window redraw is slower too, etc. Reboot fixes it.

[diver]

Attached listarea output after booting and compiling LibreOffice. I'm not sure what to look for there, tho.

[waddlesplash]

It looks completely normal to me.

I wonder if it's the port heap which is somehow getting slowed down. Try running a full-system profile to see where the time is going.

[waddlesplash]

So, I compiled GCC, and for the first 30 or so seconds after the build finished, performance was lower indeed in the ways you describe here (longer redraws, apps opening slower, etc.) However, after about a minute, things started improving, and after I ran a "sync" manually in Terminal, things were pretty much back to normal.

I have a VM paused here which is in this condition, but I really don't see much wrong with it.

There are quite a lot of "slab area"s in the kernel which looks odd, but that may just be the kernel allocator's caches, which it'll free when resources get low.

[waddlesplash]

Created #15083 for the slabs issue. Otherwise I can't reproduce this ticket, my system seems back to normal after swap stabilized.

[diver]

This is still reproducible in VMware Workstation in hrev53233 after booting and compiling LO. Opening new tab in Terminal takes one second, sync takes 3 seconds (after I let VM rest overnight).

[waddlesplash]

Yes, but does "sync" take 3 seconds the second time you run it, or any subsequent time?

[diver]

Nope, only the first time. However apps don't start launching any faster after that.

[diver]

Looks like I can't reproduce it anymore on hrev53259+3 running in VMware after compiling LibreOffice 6.3.

[nielx]

Assign tickets with status=closed and resolution=fixed within the R1/beta2 development window to the R1/beta2 Milestone