Date: Wed, 24 Nov 2004 10:55:27 +0900 From: Rob <spamrefuse@yahoo.com> To: freebsd-stable@lists.freebsd.org Subject: Re: make -j$n buildworld : use of -j investigated Message-ID: <41A3EA0F.3080500@yahoo.com> In-Reply-To: <2566.10.0.0.26.1101241872.squirrel@10.0.0.26> References: <41A2C5C0.3080908@yahoo.com> <2566.10.0.0.26.1101241872.squirrel@10.0.0.26>
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Brian Szymanski wrote: > Did you try any machines that used Hyperthreading? I'd be interested to > see how those machines fare based on the number of logical and real CPUs. > > >>Although people suggest "-j4" as optimal in general >>case, I have come to a very different conclusion: >> >>1) single CPU with enough RAM (2 GHz, 512 MB) >> there's no significant speed up in the range >> "-j1" to "-j9". >> So "-j1" is as good as "-j9". > > > If you went to all that trouble, you might as well post the numbers :-) Time unit is minutes. CPU: 2x800 MHz 2000 MHz 333 MHz RAM: 1024 MB 512 MB 64 MB -j -------------------------------- 1 99 50 276 2 58 49 291 3 58 50 367 4 57 50 547 5 58 49 6 58 50 7 57 50 8 58 50 9 58 50 Rob.
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