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Thread: FreeBSD 10.0 Kernel Comes To Debian

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  1. #1
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    Default FreeBSD 10.0 Kernel Comes To Debian

    Phoronix: FreeBSD 10.0 Kernel Comes To Debian

    Advancing prudently but quietly within the Debian camp is the Debian GNU/kFreeBSD operating system that pairs Debian's GNU user-land with the FreeBSD kernel. For Debian 8.0 "Jessie" there are continued improvements on this spin that does away with the Linux kernel. Debian GNU/kFreeBSD Jessie/Sid currently defaults to the FreeBSD 9.2.0 kernel, but a FreeBSD 10.0 development kernel has already landed in Debian and is the focus of today's benchmarks.

    http://www.phoronix.com/vr.php?view=19557

  2. #2
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    Default Linux kernel

    It would have been nice to see the Linux kernel included in the benchmark just for comparison...

  3. #3
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    Quote Originally Posted by uid313 View Post
    It would have been nice to see the Linux kernel included in the benchmark just for comparison...
    And FreeBSD 10.0 with its normal userland.

  4. #4
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    Default

    Many thanks for this, but please note that kfreebsd-image-10.0-0-amd64 10.0~svn259068-1 still had heavy debugging options enabled. I suspect that was the version used here for benchmarking. The latest kernel build uploaded Mon, 16 Dec 2013 11:50:17 UTC turns off these debugging options

  5. #5
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    The IO tests are favorable for 7.2 since that version lacked the soft-updates journaling that 10.x has. If memory serves me correctly, that was introduced somewhere in 8.x/9.x with soft-updates journaling enabled by default for new file systems.

    http://www.freebsd.org/news/status/r...ed-Softupdates

  6. #6
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    Quote Originally Posted by nslay View Post
    The IO tests are favorable for 7.2 since that version lacked the soft-updates journaling that 10.x has. If memory serves me correctly, that was introduced somewhere in 8.x/9.x with soft-updates journaling enabled by default for new file systems.

    http://www.freebsd.org/news/status/r...ed-Softupdates
    EDIT:
    FreeBSD 9.0 was the first release to have it:
    http://www5.us.freebsd.org/releases/...tailed.html#FS

    It might also be in later releases of 8.x.

  7. #7
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    Quote Originally Posted by nslay View Post
    The IO tests are favorable for 7.2 since that version lacked the soft-updates journaling that 10.x has
    Soft-updates are available since at least 8.x kernels, but the installer for Debian GNU/kFreeBSD didn't enable them yet (FreeBSD itself does, on all except the root filesystem). So that feature was likely not being used in any of these benchmark runs. If enabled, I think performance would actually improve in some cases (as it avoids waiting for each metadata change to be individually written to disk).

  8. #8
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    Quote Originally Posted by uid313 View Post
    It would have been nice to see the Linux kernel included in the benchmark just for comparison...
    Quote Originally Posted by dnebdal View Post
    And FreeBSD 10.0 with its normal userland.

    I agree, with all possible combinations of using ZFS, Btrfs and Ext4 (two last ones being Linux-only)

  9. #9
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    Sep 2009
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    313

    Default Why?

    Seriously why mix BSD with GNU? Especially considering Debian has a pretty nice Linux system.

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