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Re: [Qemu-devel] QEMU travis builds: can we move the preseed tarball to
Re: [Qemu-devel] QEMU travis builds: can we move the preseed tarball to qemu.org ?
Tue, 25 Apr 2017 12:19:57 -0400
On Apr 25, 2017 11:55 AM, "Alex Bennée" <address@hidden> wrote:
Daniel P. Berrange <address@hidden> writes:
> On Tue, Apr 25, 2017 at 04:24:18PM +0100, Alex Bennée wrote:
>> Daniel P. Berrange <address@hidden> writes:
>> > On Tue, Apr 25, 2017 at 03:51:17PM +0100, Peter Maydell wrote:
>> >> Hi; a recent travis build failure made me notice that our .travis.yml
>> >> config references a preseed tarball from here:
>> >> http://people.linaro.org/~alex.bennee/qemu-submodule-git-seed.tar.xz
>> >> I think this is a bit less than ideal -- we should really be hosting
>> >> this on qemu.org. Can we arrange to move it?
>> > I'm curious how much speed difference there is in seeding the git
>> > in this way vs letting git pull down from git.qemu.org directly ?
>> It was quite high from what I recall, exacerbated by the fact we have
>> quite so many submodules. Unfortunately it doesn't seem that easy to go
>> back in the history of the tests to find out so I'll have to re-run the
>> So roughly 62s without a seed vs 15s with. I presume the seed is also
>> cached by Travis's web-caching.
> Wow, yes, that is quite a difference !
> I wonder if Travis' arbitrary sub-dir caching feature would help us to
> the same extent, while avoiding need to manually maintain the preseed.
> It just caches entire content of a given subdir between runs. First time
> it would be slow, but presumably fast thereafter, and any time the
> gets new updates, those would get cached too
Maybe but I think the cwd of the build (and therefor the git tree) is
user and project name dependent, e.g.:
But we could certainly try.
I do currently have an async script that runs for qemu.git, that is
triggered by a post-receive hook. Currently, it just does a push to
GitHub, so that the mirror is updated in real-time. It would be pretty
trivial to have it also compose a tarball as well.
Re: [Qemu-devel] QEMU travis builds: can we move the preseed tarball to qemu.org ?, Alex Bennée, 2017/04/25