Network buffer allocations: mbuma, PLEASE TEST

From: Bosko Milekic (bmilekic_at_FreeBSD.org)
Date: 05/26/04

  • Next message: Steven Hartland: "Re: KVA space problems?" 
    Date: Wed, 26 May 2004 13:34:31 -0700
To: freebsd-net@freebsd.org

    Hi,

      If you're running -CURRENT, please test this:

    http://people.freebsd.org/~bmilekic/code/mbuma2.diff

      It is several extensions to UMA and mbuf & cluster allocation
      built on top of it.

      Once you apply the patch from src/, you need to rebuild and
      reinstall src/usr.bin/netstat, src/usr.bin/systat, and then
      a new kernel. When you're configuring your new kernel,
      you should remove the NMBCLUSTERS compile-time option, it's
      no longer needed. Clusters will still be capped off
      according to maxusers (which is auto-tuned itself).
      Alternately, if you want theoretically unlimited number
      of clusters, you can tune the boot-time kern.ipc.nmbclusters
      tunable to zero.

      Unless final issues arise I'm going to commit this tomorrow
      morning; it's been tested already quite a bit, and performance
      considered. A paper is available and was presented at
      BSDCan 2004; in case you missed it:

    http://www.unixdaemons.com/~bmilekic/netbuf_bmilekic.pdf

      It has been looked at for quite some time now. Additional
      code cleanups will need to occur following commit, maybe.
      Future work is also possible, see the paper if you're
      interested in taking some of it on.

      Oh, and keep me in the CC; I have no idea if I'm
      subscribed to these lists anymore. You should also follow
      up to this thread on -net and not on -hackers (trim
      -hackers from CC in the future). Thanks and happy
      hacking!

    Regards, 

    --
Bosko Milekic
bmilekic@technokratis.com
bmilekic@FreeBSD.org
 
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  • Next message: Steven Hartland: "Re: KVA space problems?"