Performance issues in cups 1.3

[Johan Bernhardsson]

The real problem is in the hp-ux clients from what ive seen. They use poll from what ive seen.

Ill try to gather some strace output from the servers. And fetch the same from the clients.

Ive tried to gather some debug2 logs. But i have to setup a test system for it. As we currently have to many printjobs to get any readable info.

/Johan "SmallOne" Bernhardsson


> Johan Bernhardsson wrote:
> > ...
> > When we push alot jobs through a client the load rises quite fast and we get delays.
> >
> > This seems to have started with the 1.3 release as we didnt have that in 1.2.7 that we ran before. The cpu usage is not the same.
> >
> > Has anyone else noted anything like this ?
>
> I haven't, but the scheduler in CUPS 1.3 no longer uses select() when
> one of the alternate mechanisms is available - that would mean poll()
> or epoll() on RHEL4.
>
> strace output from cupsd on the servers might be useful in seeing
> where the scheduler is spending its time...
>
> --
> ______________________________________________________________________
> Michael R Sweet                        Senior Printing System Engineer
>