From: Mark Hatle <mark.hatle@windriver.com>
To: <yocto@yoctoproject.org>
Subject: Re: what's the proper value for BB_NUMBER_THREADS?
Date: Mon, 31 Oct 2011 12:15:28 -0500 [thread overview]
Message-ID: <4EAED7B0.4050909@windriver.com> (raw)
In-Reply-To: <alpine.DEB.2.02.1110301214180.915@localhost6.localdomain6>
On 10/30/11 11:15 AM, Robert P. J. Day wrote:
> On Sun, 30 Oct 2011, Christian Gagneraud wrote:
>
>> On 30/10/11 15:32, Robert P. J. Day wrote:
>>>
>>> all the docs recommend twice the number of cores (AFAICT), yet the
>>> template local.conf file suggests that, for a quad core, the value of
>>> 4 would be appropriate. shouldn't that say 8? same with
>>> PARALLEL_MAKE?
>>
>> Hi Robert,
>>
>> The Poky ref manual says (rule of thumb) x2 for BB_NUMBER_THREADS,
>> and x1.5 for PARALLEL_MAKE.
>
> if that's the case, anyone object to my submitting a patch to
> update local.conf.sample appropriately?
>
> rday
>
I agree the manual and local.conf files should match. The issue seems to be
that the perfect values are subjective. Things like memory, disk speed, chipset
latency, and of course processor speed/cores all affect the optimal setting.
But we do need a consistent rule of thumb.. I myself usually use x2 for both
THREADS and MAKE.
--Mark
next prev parent reply other threads:[~2011-10-31 17:15 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-30 15:32 what's the proper value for BB_NUMBER_THREADS? Robert P. J. Day
2011-10-30 16:03 ` Christian Gagneraud
2011-10-30 16:15 ` Robert P. J. Day
2011-10-31 17:15 ` Mark Hatle [this message]
2011-10-31 17:25 ` Robert P. J. Day
2011-10-31 17:39 ` Gary Thomas
2011-11-03 17:32 ` Darren Hart
2011-11-03 17:41 ` Robert P. J. Day
2011-11-15 23:08 ` Rifenbark, Scott M
2011-11-15 23:51 ` Darren Hart
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