Date: Wed, 27 Feb 2013 15:58:34 -0700 (MST) From: Warren Block <wblock@wonkity.com> To: Frederico Costa <fredports@mufley.com> Cc: Michael Ross <gmx@ross.cx>, freebsd-questions@freebsd.org Subject: Re: Performance Related Question Message-ID: <alpine.BSF.2.00.1302271551320.57262@wonkity.com> In-Reply-To: <95256df2d5f04884368acf0f73bb82d0@www.mufley.com> References: <8d801e895617b492ddf724b6ce980448@www.mufley.com> <op.ws6rcqqsg7njmm@michael-think> <95256df2d5f04884368acf0f73bb82d0@www.mufley.com>
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On Wed, 27 Feb 2013, Frederico Costa wrote: > On 2013-02-27 22:27, Michael Ross wrote: >> If I read you right, you didn't ``make -jX buildworld'', >> with X being the number of processes to spawn, >> so you used just one core on either machine. >> >> Buildworld does a lot of I/O, so disk speed is relevant. > > Yes, i just made "make buildworld". > > So i should use make -j2 on the S1(dual core) and -j4 on S2 (2xdualcore)? > > And it also makes sense what you say about the I/O. It really depends on the system. On my dual-core systems, I use devel/ccache and found that -j8 gave the best performance.
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