Re: [Lse-tech] Re: ext3 performance bottleneck as the number of spindles

Dave Hansen (haveblue@us.ibm.com)
Sun, 23 Jun 2002 00:29:23 -0700

William Lee Irwin III wrote:
> On Sun, Jun 23, 2002 at 12:00:01AM -0600, Christopher E. Brown wrote:
>
>>However, multiple busses are *rare* on x86. There are alot of chained
>>busses via PCI to PCI bridge, but few systems with 2 or more PCI
>>busses of any type with parallel access to the CPU.
>
> NUMA-Q has them.
>

Yep, 2 independent busses per quad. That's a _lot_ of busses when you
have an 8 or 16 quad system. (I wonder who has one of those... ;)

Almost all of the server-type boxes that we play with have multiple
PCI busses. Even my old dual-PPro has 2.

-- 
Dave Hansen
haveblue@us.ibm.com


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