On Sat, 22 Jun 2002, Andreas Dilger wrote:
> On Jun 22, 2002 22:02 -0600, Christopher E. Brown wrote:
> > On Thu, 20 Jun 2002, Griffiths, Richard A wrote:
> >
> > > I should have mentioned the throughput we saw on 4 adapters 6 drives was
> > > 126KB/s. The max theoretical bus bandwith is 640MB/s.
> >
> > This is *NOT* correct. Assuming a 64bit 66Mhz PCI bus your MAX is
> > 503MB/sec minus PCI overhead...
>
> Assuming you only have a single PCI bus...
Yes, we could (for example) assume a DP264 board, it features 2/4/8
way memory interleave, dual 21264 CPUs, and 2 separate PCI 64bit 66Mhz
buses.
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.
--
I route, therefore you are.
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This archive was generated by hypermail 2b29 : Sun Jun 23 2002 - 22:00:26 EST