Date: Sun, 09 Feb 2014 21:43:52 -0600 From: Tim Daneliuk <tundra@tundraware.com> To: freebsd-stable@freebsd.org Subject: And Here I Thought buildworld/makeworld Was IO Bound Message-ID: <52F84AF8.8050007@tundraware.com>
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For some years now, I have been doing nightly builds of -STABLE on an old Pentium D machine with 2G of memory. Buildworld + 2 different kernels was taking in the neighborhood of 3 1/2 hours or so to run. I then upgraded the Mobo/CPU to a Haswell Quadcore I5-4570 and, sure enough, the build time for all the above came down to 30-35 mins or so. "So", says I, "I'll bet a faster drive would help considering all the scribbling to the disk the compilers and makes do". So, I upgdared to a Kingston SSD Now 300, 120G hard drive and he time to do the above went down to .... wait, it's still about 30-35 mins ???? So, I've tried fiddling with different values for -j on the make command line to little avail. Well, -j8 and -j16 show no real difference here. So is the bounding function here actually CPU not IO? Am I missing something? Thanks, P.S. Trying now with no -j arg on make invocation. -- ---------------------------------------------------------------------------- Tim Daneliuk tundra@tundraware.com PGP Key: http://www.tundraware.com/PGP/
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