Re: [arch-general] High CPU on one core, but unable to find process responsible

2018-03-13 Thread David Rosenstrauch
On 03/13/2018 03:34 AM, Carsten Mattner via arch-general wrote: On 3/13/18, David Rosenstrauch wrote >> I have an old PCI card in the machine that's powers an old parallel port printer I used to use with it. Perhaps that's failing. I don't need the card anymore, so I

Re: [arch-general] High CPU on one core, but unable to find process responsible

2018-03-13 Thread Carsten Mattner via arch-general
On 3/13/18, David Rosenstrauch wrote: > > > On 03/12/2018 09:56 PM, Carsten Mattner via arch-general wrote: >> Any BIOS updates or kernel updates recently (4.15.8)? >> >> Try with 3.16 or 4.9 or another old lts kernel from archive.archlinux.org >> just for testing (not

Re: [arch-general] High CPU on one core, but unable to find process responsible

2018-03-12 Thread David Rosenstrauch
On 03/12/2018 09:56 PM, Carsten Mattner via arch-general wrote: Any BIOS updates or kernel updates recently (4.15.8)? Try with 3.16 or 4.9 or another old lts kernel from archive.archlinux.org just for testing (not production). It's more likely that the kernel regressed rather than IRQ issues

Re: [arch-general] High CPU on one core, but unable to find process responsible

2018-03-12 Thread Carsten Mattner via arch-general
On 3/13/18, David Rosenstrauch wrote: > So if this issue is irq-based, I guess that means some piece of hardware > is faulty or failing. Any idea how I might go about pinning down which > one? Would there be info in the kernel log about this? Or something > that I can look

Re: [arch-general] High CPU on one core, but unable to find process responsible

2018-03-12 Thread David Rosenstrauch
On 03/12/2018 05:13 AM, Jiachen Yang via arch-general wrote: On 2018年03月12日 11:19, David Rosenstrauch wrote: My server's been exhibiting some very strange behavior lately.  Every couple of days I run into a situation where one core (core #0) on the quad core CPU starts continuously using

Re: [arch-general] High CPU on one core, but unable to find process responsible

2018-03-12 Thread David C. Rankin
On 03/11/2018 09:19 PM, David Rosenstrauch wrote: > My server's been exhibiting some very strange behavior lately.  Every couple > of days I run into a situation where one core (core #0) on the quad core CPU > starts continuously using around 34% of CPU, but I'm not able to see (using > htop) any

Re: [arch-general] High CPU on one core, but unable to find process responsible

2018-03-12 Thread Jiachen Yang via arch-general
On 2018年03月12日 11:19, David Rosenstrauch wrote: > My server's been exhibiting some very strange behavior lately.  Every > couple of days I run into a situation where one core (core #0) on the > quad core CPU starts continuously using around 34% of CPU, but I'm not > able to see (using htop) any

Re: [arch-general] High CPU on one core, but unable to find process responsible

2018-03-11 Thread Carsten Mattner via arch-general
On 3/12/18, David Rosenstrauch wrote: > My server's been exhibiting some very strange behavior lately. Every > couple of days I run into a situation where one core (core #0) on the > quad core CPU starts continuously using around 34% of CPU, but I'm not > able to see (using