Re: 4.7 vs 5.2.1 SMP/UP bridging performance

From: John Baldwin (jhb_at_FreeBSD.org)
Date: 05/07/04

  • Next message: John Baldwin: "Re: em(4) problems." 
    To: freebsd-current@FreeBSD.org
Date: Fri, 7 May 2004 14:00:06 -0400

    On Thursday 06 May 2004 03:14 pm, Julian Elischer wrote:
    > On Thu, 6 May 2004, John Baldwin wrote:
    >
    > [lots of complicated stuff removed]
    >
    > You'd think that intel would have implemented a simple, fast
    > smp-capable lock primative by now..

    cmpxchg isn't that slow on non-P4. :) The membars I described above are
    basically what you have on sparc9, alpha (alpha's is simpler though), and
    ia64 as well. It really isn't that complicated since all the magic is in the
    locking primitives. As long as you properly use the system locking
    primitives you don't have to worry about this stuff. 

    -- 
John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org
_______________________________________________
freebsd-current@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
  • Next message: John Baldwin: "Re: em(4) problems."