[openib-general] Bit Error Rates

Thu Apr 1 05:04:07 PST 2004

At 06:12 PM 3/31/2004, ron minnich wrote:
>On 31 Mar 2004, Roland Dreier wrote:
>> And even if you do checksum it once how do you know your memory
>> controller or cache controller doesn't corrupt it before the next time
>> the app uses it?
>
>This is a quantitative issue. The BER on these components is a tad better 
>than what I've been quoted for IB.

Ron - I'm curious whether you've measured BERs for cache and memory
buses, and what they are. At 7000 feet, for example.

I completely agree on the end-to-end integrity comments. Not sure we
can fix the 10-15/10-18 nic-to-nic estimate in stone, but I can agree
that 10-21 is probably outside the band.

Do you find a difference using fiber or copper?

Tom.

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