Xeon Gold 6138's Running FBSD 11.1 and TrueOS Stable [GCC 5.4]

Allan Jude allanjude at freebsd.org
Mon Oct 9 02:42:13 UTC 2017

On 2017-10-08 21:03, grarpamp wrote:
> http://www.phoronix.com/vr.php?view=25148
> While we have tested a number of Linux distributions on Intel's new
> Xeon Scalable platform, here are some initial BSD tests using two Xeon
> Gold 6138 processors with the Tyan GT24E-B7106 1U barebones server.
> FreeBSD 11.1 and the FreeBSD-derivative desktop/workstation-focused
> TrueOS (formerly known as PC-BSD) were the primary candidates for
> testing. TrueOS stable is currently tracking FreeBSD 12.0-CURRENT
> development.
> When comparing the out-of-the-box performance of FreeBSD/TrueOS and
> even with running under the GCC compiler rather than LLVM Clang, the
> Linux distributions were offering noticeably better performance on
> this dual Intel Xeon Gold server.
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You might want to try enabling turbo boost.

sysctl dev.cpu.0.freq=9999

This will change the cpu frequency from the default (2000 mhz) to 2001
mhz, which will enable turbo boost (this specific CPU bursts to 3700
mhz), so this will likely make a very large difference in your benchmarks.

To get more consistent results, you may actually want to disable
turboboost in the bios, and rerun the benchmarks on ALL of the operating

Allan Jude

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