Date: Tue, 22 Oct 2013 17:04:06 -0700 From: Charles Swiger <cswiger@mac.com> To: aurfalien <aurfalien@gmail.com> Cc: FreeBSD - <freebsd-questions@freebsd.org> Subject: Re: FreeBSD, Centos and ZFS - SOLVED Message-ID: <852AD883-D21A-4E34-9907-BF78696DE069@mac.com> In-Reply-To: <25C055B9-4A19-46C8-B78E-AC8BD6E00CD9@gmail.com> References: <CBA24BB3-4A57-428C-B342-4BEB678B8D43@gmail.com> <1381600575.18393.33219025.5D7B78D0@webmail.messagingengine.com> <8CA809B3-1692-4760-A63F-9D7451EB49BD@gmail.com> <525D143B.50202@gmail.com> <DF3E552D-D2E6-464C-88EA-7AF34E8329CC@gmail.com> <1382285088.2462.36238881.1AA6BB17@webmail.messagingengine.com> <25C055B9-4A19-46C8-B78E-AC8BD6E00CD9@gmail.com>
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Hi-- On Oct 22, 2013, at 4:40 PM, aurfalien <aurfalien@gmail.com> wrote: > OMG, what a relief... the ~30% diff in performance was due to a BIOS = setting, in particular this one; >=20 > Intel Turbo Boost Technology This is Intel's automatic overclocking, which mainly ups the speed on = multicore CPUs if some of the cores are idle leaving thermal headroom. You usually = want this on for best performance. > Enhanced Intel SpeedStep Tech This is dynamic power management involving lower clock frequencies and = usually voltages; it reduces power consumption, but can also reduce performance for some = workloads if not properly tuned. Leaving it off for best performance is = reasonable. Regards, --=20 -Chuck
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