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Re: yum-presto not on by default



On 09/24/2009 11:31 PM, Seth Vidal wrote:
> 
> 
> On Thu, 24 Sep 2009, Ben Boeckel wrote:
> 
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA256
>>
>> Seth Vidal wrote:
>>>> Does yum-presto make use of multiple cores when rebuilding the
>> RPMs?
>>>> (My machines only have one, so I can't tell.)
>>>
>>> other than the xz compression part I believe most of the time is
>>> disk bound, not cpu bound.
>>>
>>> -sv
>>>
>>
>> The rpmrebuild operation has saturated one of my 3.0GHz Intel Core
>> 2 Duo cores for at least a minute on large updates, so my guess is
>> that that part is not multithreaded and CPU bound.
>>
> 
> right, currently - using xz -6 - which is using more cpu.

Running {make,apply}deltaiso always maxes out my 2.7 GHz CPU, even
between ISOs with RPMs using Gzip.  I'll check what happens next time
it's doing a delta rebuild during a F11 update.


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