On Tue, 29 Sep 2020 at 09:26, ToddAndMargo via users < users@lists.fedoraproject.org> wrote:
> On 2020-09-28 05:49, Jonathan Billings wrote: > > On Sat, Sep 26, 2020 at 04:11:33PM -0700, ToddAndMargo via users wrote: > >> FC 32, x64 > >> Ext4 > >> Xfce 4.14 > >> > >> Occasionally, my computers slows down. I have not been > >> able to pin down why. Top shows very little memory usage. > >> > >> A 1 hour, 12 minute dump (dump/restore) takes 15 hours > >> when this happens. Pop up menus start to lag behind > >> the mouse > >> > >> I am trying to get around the reboot thing. > >> > >> -T > >> > >> A reboot ALWAYS fixes the issue. > > > > Brendan Gregg has written several good talks and documents about > > various Linux performance measurement tools. You might want to see > > what the kernel is doing when you see sluggish behavior. > > > > http://brendangregg.com/linuxperf.html > > This is an excellent site. For starters, though, bpytop gives an overview that may help focus your investigation. > > > It does require some deep spelunking into the kernel internals, but it > > is actually quite amazing what the kernel has for monitoring its > > activities. I use it quite often to debug filesystem behavior, just > > poke around /sys/kernel/debug/tracing/events/. > > Anything is particular to look at? > For starters: temperature spikes (numerous utilities, including bpytop) and disk errors (smartmontools). This doesn't appear to be a widespread problem, so you should think about malware, uncommon hardware, uncommon software. If you have the resources to swap out the storage and start with a fresh install to see if the problem goes away that would help narrow the search. > > > > https://www.kernel.org/doc/html/v5.8/trace/events.html > > > > From my experience, as an end user providing feedback, the kernel > > developers really like it when you can point out a particular syscall > > from the trace output that is misbehaving. > > Very true. -- George N. White III
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