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Date:      Mon, 10 Feb 2014 17:57:39 -0600
From:      Tim Daneliuk <tundra@tundraware.com>
To:        freebsd-stable@freebsd.org
Subject:   Re: And Here I Thought buildworld/makeworld Was IO Bound
Message-ID:  <52F96773.7040503@tundraware.com>
In-Reply-To: <20140210205902.GJ1629@glenbarber.us>
References:  <52F84AF8.8050007@tundraware.com> <52F86768.9000109@googlemail.com> <52F8E8C6.2060909@tundraware.com> <20140210152407.GB1629@glenbarber.us> <52F8F426.9000003@tundraware.com> <20140210160736.GC1629@glenbarber.us> <52F93929.1070203@tundraware.com> <20140210204339.GI1629@glenbarber.us> <52F93AFF.9090806@tundraware.com> <20140210205902.GJ1629@glenbarber.us>

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On 02/10/2014 02:59 PM, Glen Barber wrote:
> There are two things to consider though.  I'm not cranking the number of
> '-j' as high as it probably can go.  I'm intentionally limiting it to
> 'j10' and '-j6' in order to do parallel builds.  I'm sure '-j24' or
> higher in this case would reduce overall build time.

Noted.

>
> I'm just not comfortable doing that, because there are a few (sometimes
> easily-triggered, other times not so easily-triggered) race conditions
> that can cause the builds to fall over to easily.  So limiting to
> a relatively safe number, scaling out certainly does help.
>

I have seen this already trying to crank up the process from j8 to j16.


Thanks for the insight and help.  Most interesting.


-- 
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Tim Daneliuk     tundra@tundraware.com
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