[gentoo-dev] emerge world taking excessive CPU/real time

[gentoo-dev] emerge world taking excessive CPU/real time

[Robert Bradbury]

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I commonly run:
  emerge --pretend --update --verbose --deep --newuse world
at least once every day to provide a list of recently updated packages that
I need to re-emerge.

I've noticed recently (in the last 1-2 weeks) that it seems to be taking a
very long time.  The one I've got running now has on the order of 8+ CPU
minutes which seems very long.  I think this used to take <2 minutes.

I've also noticed some chatter on the gentoo-dev list about including
package dates in the portage database.

Has anyone else encountered this problem or have any ideas about the
possible cause?  Could it be python version related?

Versions are: portage-2.1.7.1 and Python 2.6.3 (r263:75183, Oct  3 2009,
02:52:55).

Thanks,
Robert

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Re: [gentoo-dev] emerge world taking excessive CPU/real time

[Zac Medico]

Robert Bradbury wrote:
> I commonly run:
>   emerge --pretend --update --verbose --deep --newuse world
> at least once every day to provide a list of recently updated packages
> that I need to re-emerge.
> 
> I've noticed recently (in the last 1-2 weeks) that it seems to be taking
> a very long time.  The one I've got running now has on the order of 8+
> CPU minutes which seems very long.  I think this used to take <2 minutes.

Maybe it's backtracking for some reason. If that's the case, should
see some related messages about backtracking. Please file a bug at
http://bugs.gentoo.org and include --pretend --debug output for the
long-running dependency calculation.

> I've also noticed some chatter on the gentoo-dev list about including
> package dates in the portage database.
> 
> Has anyone else encountered this problem or have any ideas about the
> possible cause?  Could it be python version related?

I haven't seen any other reports like this. I doubt that the python
version is related.

> Versions are: portage-2.1.7.1 and Python 2.6.3 (r263:75183, Oct  3 2009,
> 02:52:55).
> 
> Thanks,
> Robert
> 
> 


-- 
Thanks,
Zac

Re: [gentoo-dev] emerge world taking excessive CPU/real time

[Zac Medico]

Zac Medico wrote:
> Robert Bradbury wrote:
>> I commonly run:
>>   emerge --pretend --update --verbose --deep --newuse world
>> at least once every day to provide a list of recently updated packages
>> that I need to re-emerge.
>>
>> I've noticed recently (in the last 1-2 weeks) that it seems to be taking
>> a very long time.  The one I've got running now has on the order of 8+
>> CPU minutes which seems very long.  I think this used to take <2 minutes.
> 
> Maybe it's backtracking for some reason. If that's the case, should
> see some related messages about backtracking.

In portage-2.1.7.3 the maximum backtrack count has been reduced from
30 to 5, and there's also a new --backtrack=COUNT option that you
can use to control it.
-- 
Thanks,
Zac