Re: Causes, cures and prevention of orphaned inodes?
- Date: Mon, 05 Feb 2018 10:56:16 -0500
- From: "Stephen P. Molnar" <s.molnar@xxxxxxxxxxxxx>
- Subject: Re: Causes, cures and prevention of orphaned inodes?
On Mon, 2018-02-05 at 10:15 +1300, Ben Caradoc-Davies wrote:
> On 05/02/18 09:49, Stephen P. Molnar wrote:
> > They seem to happen when I am
> > running four or more apps at the same time.
> I would never expect to see orphaned inodes except after a system
> or kernel memory corruption. How did you test your CPU and RAM? Do
> see any other symptoms such as segfaults that could suggest memory
> problems under concurrent load? How long have you seen this problem?
> see you are using ext4; are the inodes on these filesystems? ext4 is
> very well tested and robust.
> My preferred memory test for my 4-core (8-thread) Kaby Lake i7 is to
> concurrent "memtester" instances equal to the number of cores (4 in
> case), concurrent with "stress" equal to the number of cores ("stress
> 4" in my case). This workout detected memory problems not found by
> tools such as "memtest86+" or "mprime -t".
> Other hardware issues to consider are overheating (addressed with
> cooling and thermald) and power supply problems which may only be
> evident at load. Is your system prime stable (i.e. runs with "mprime
> (with AVX disabled) for many hours)? How do you monitor system
> Kind regards,
Thanks for your reply.
As a matter of fact I did get an overheating warning from the OS when
running a rather large organic molecule on the Orca package with 8
threads. I upgraded the CPU cooler to a Hyper 212 EVO and the problem
Stephen P. Molnar, Ph.D.