Gentoo Archives: gentoo-dev

From: "Michał Górny" <mgorny@g.o>
To: gentoo-dev@l.g.o
Cc: vivo75@×××××.com
Subject: Re: [gentoo-dev] Six month major project on Gentoo
Date: Thu, 22 Dec 2011 15:55:12
Message-Id: 20111222165518.6cd251d9@pomiocik.lan
In Reply to: Re: [gentoo-dev] Six month major project on Gentoo by Francesco Riosa
On Thu, 22 Dec 2011 12:11:32 +0100
Francesco Riosa <vivo75@×××××.com> wrote:

> > I tried messing around with this with Amazon EC2.  The problem was > > that due to latency I only really saw the benefit for VERY high > > levels of parallelization (think -j25+)..  However, make isn't > > actually "distcc-aware" so it just runs 25 jobs of anything in > > parallel.  So, anytime a makefile launched a ton of java or python > > jobs the host ground to a halt as it wasn't distributed and it was > > way more than the host could handle (especially java - which > > swapped like there was no tomorrow). > > Just wanted to point out that (if there is enough memory) recent > kernels manage much better parallelism, even excess of it, once > reached the maximum load augmenting threads only bring minimal loss of > "real" time.
Does that include handling complete lack of memory and heavy swapping? -- Best regards, Michał Górny


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Subject Author
Re: [gentoo-dev] Six month major project on Gentoo Rich Freeman <rich0@g.o>