Faster builds
Michael Schwendt
bugs.michael at gmx.net
Fri Jan 4 05:08:18 UTC 2008
On Thu, 3 Jan 2008 19:07:49 -0800, Jeff Sheltren wrote:
> On Jan 3, 2008, at 5:59 PM, Michael Schwendt wrote:
>
> > Some good news for package maintainers with many sub-packages:
> >
> > Plague used to sleep at least 20 seconds for each (!) file it had to
> > download from a builder. Even downloading the several small log
> > files used
> > to take at least 20 seconds *each*.
> >
> > Reading and debugging the code, I found the source of the problem and
> > taught the build server to sleep less when files are being downloaded.
> > Interestingly, the speedup is noticeable even for tiny build-jobs,
> > e.g.
> >
> > revisor down from 7m to 4m
> > nagios down from 6m to 4m
> >
> > but it will be incredible for build-jobs with a larger number of pkgs
> > (e.g. try moodle or nagios-plugins which are in EPEL already). That
> > means, such packagers get the build-results and the mail notification
> > much faster.
> >
>
> Michael, that's very cool. This has always been something that bugged
> me when using plague, but I never got around to figuring out why the
> "downloading" code was so slow, even locally. Would you mind posting
> a patch for plague with your changes?
The less aggressive [*] patch I've applied is this:
http://mschwendt.fedorapeople.org/plague-0.4.4.1-faster-downloads.patch
With it, perl-Inline built in 1 minute while revisor built in 2 mins:
http://buildsys.fedoraproject.org/build-status/job.psp?uid=37772
http://buildsys.fedoraproject.org/build-status/job.psp?uid=37771
--
[*] "Less aggressive" with regard to the trade-off between polling
and sleeping.
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