Re: Gimp broken in Debian Sid?

[Thierry Rascle <thierr26@free.fr>]

On Sun, 8 Jul 2018 10:37:10 +1200
Ben Caradoc-Davies <ben@transient.nz> wrote:

> I would use ltrace to see where it is hanging:
> 
> ltrace -tt -n4 -S gimp
> 
> You will need to install ltrace and likely the debug packages for 
> wherever it is hanging.

ltrace -tt -n4 -S /usr/bin/gimp outputs a lot lines and the last one is
like:

10:01:04.820439     SYS_futex(0x7f8d0648a9d0, 0, 6356, 0

strace -f /usr/bin/gimp also outputs a lot lines and the last ones are
like:

[pid  6789] futex(0x7f1d25b6b9d0, FUTEX_WAIT, 6791, NULL <unfinished ...>
[pid  6791] futex(0x7f1d3d401968, FUTEX_WAIT_PRIVATE, 2, NULL

'ps aux' tells me that one of the pid is gimp, and the other one is not
existing. So it could be that Gimp is just waiting for a dead process.
I don't know how to identify this dead process.

I looked for a way to force Gimp to run on a single thread and Google
pointed me to this URL:

https://superuser.com/questions/692138/how-to-force-a-process-to-run-on-a-single-thread-only-with-numactl

So I tried:

numactl --physcpubind=+1 /usr/bin/gimp

and Gimp works :-)

Of course I still don't know what the root cause of the problem is...

Many many thanks for your help and suggestions :-)

-- 
Thierry