[OE-core] Long delays with latest bitbake (was: [PATCH 1/7] insane.bbclass: in file-rdeps do not look into RDEPENDS recursively)
richard.purdie at linuxfoundation.org
Tue Aug 13 19:18:41 UTC 2019
On Tue, 2019-08-13 at 10:04 +0100, Richard Purdie wrote:
> On Mon, 2019-08-12 at 20:26 +0000, Peter Kjellerstedt wrote:
> > Comparing that build to a corresponding do-nothing build with Thud,
> > the time difference matches those three minutes where I have no
> > idea
> > what bitbake is doing now that it didn’t need to do before…
> > Hopefully these time degradations can be solved, because the
> > current
> > state of bitbake is barely usable. We also need to look into
> > possible
> > ways to improve the cooker output when it is running the setscene
> > tasks so it makes some kind of sense again.
> We talked on irc and you pointed at the commit things started to go
> wrong. Just to summarise things for the benefit of the list, this is
> some quick testing I did:
> "bitbake -p; time bitbake core-image-minimal -n"
> 30.0s 6c7c0cefd34067311144a1d4c01986fe0a4aef26
> 30.6s a0d941c787cf3ef030d190903279d311bc05d752
> 40.3s 7df31ff36892c2f9c65326b06b4c70
> 42.2s a0542ed3ff700eca35f9195f743c9e28bcd50f3e
> 45.4s 9983b07fffd19082abded7c3f15cc77d306dd69c
> 76.9s master-next
> So basically the original changes showed a 25% hit but the
> of -next is dire.
> This is with no hash equiv server configured.
> It will vary depending on the target used (numbers with -sato for the
> above would be interesting for comparision) and how much was or is in
> sstate, they type of sstate mirror configured and so on.
> I really need to focus on getting the new code functioning correctly
> before we attempt to optimise but if nobody tests the new code due to
> performance problems we have a different issue. We also have a
> problem with the hash server itself I need to fix to stop the
> autobuilder throwing weird errors. I'm therefore a bit challenged on
> where to start with it all :/.
I had a glance at the profile output from master-next and the problem
wasn't where I thought it would be, it was in the scheduler code. That
is good as those classes are effectively independent of the other
changes and hence are a separate fix.
I've put a patch in -next which takes the above test to 36s which is
close to the older bitbake.
Could be interesting to see how it looks for others and different
More information about the Openembedded-core