Date: Mon, 12 Feb 2001 22:36:40 -0800 From: Jordan Hubbard <jkh@winston.osd.bsdi.com> To: kstewart@urx.com Cc: Danny Braniss <danny@cs.huji.ac.il>, freebsd-hackers@FreeBSD.ORG Subject: Re: soft updates performance Message-ID: <81045.982046200@winston.osd.bsdi.com> In-Reply-To: Message from Kent Stewart <kstewart@urx.com> of "Mon, 12 Feb 2001 18:44:25 PST." <3A889F89.8CDD507F@urx.com>
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> One other point that I would like to understand is why -j4 takes > longer on all of my systems. That goes against what everyone claims > should happen. With how many running processors? If you're running -j4 on a uniprocessor system, you're only introducing competition for already scarce CPU resources, though -j2 can be a speedup since this allows one target build to run while another is in an I/O wait. I've only seen a speedup with -j4 when using at least 2 CPUs. - Jordan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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