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Re: High TLB shootdown I interrupts with wm gigabit NIC?
Matthias Scheler wrote:
On Wed, Jul 30, 2008 at 06:42:30PM +0100, Mark Cullen wrote:
(markie@homeserver:ttyp0)-(~)$ uname -a
NetBSD homeserver.bone.servebeer.com 4.0_STABLE NetBSD 4.0_STABLE
(HOMESERVER.MP) #2: Sat Jul 12 14:54:54 BST 2008
NetBSD 4.0's kernel doesn't have very scalable SMP support. The high
number of TLB shootdowns is probably a side effect of that.
The good news is that SMP scalability has been improved a lot in
NetBSD-current, mostly because of Andy Doran's work.
Would this have anything to do with it hitting a brick wall at 30MB/s? I
don't even know what this TLB shootdown thing is, I just though may be
it would be related to the "slow" speeds I am seeing.
It could just be the limit of the disks I suppose, though I thought they
were good to about 50MB/s.
I'm not comfortable running -current really. I'd like to have it just
sit there and work for another few years, as with the previous hardware
/ install (3.1) :)
Mark Cullen <mark.r.cullen%gmail.com@localhost>
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