very high bandwidth, low latency manner?

Iwao Makino rickey-co at mug.biglobe.ne.jp
Thu Apr 11 01:15:40 EDT 2002


I think ... Quadrics<http://www.quadrics.com/> is another one.

Here's quick figures I have on hand....

RH7.2, 2.4.9 kernel for i860 cluster.
On their site, they claim;
after protocol, of 340Mbytes/second in each direction. The 
process-to-process latency for remote write operations is2us, and 5us for 
MPI messages.

But pricing is MUCH higher than SCI/Myrinet.

Best regards,

At 4:08 +0200 5.04.2002, Steffen Persvold wrote:
>On Thu, 4 Apr 2002, Jim Lux wrote:
>
>>  What's high bandwidth?
>>  What's low latency?
>  > How much money do you want to spend?
>I don't want to start a flamewar here, but I _think_ (not knowing real
>numbers for other high speed interconnects) that SCI has atleast the
>lowest latency and maybe also the highest point to point bandwidth :
>
>SCI application to application latency   : 2.5 us
>SCI application to application bandwidth : 325 MByte/sec
>
>Note that these numbers are very chipset specific (as most high speed
>interconnect numbers are), these numbers are from IA64. Here are numbers
>from a popular IA32 platform, the AMD 760MPX :
>
>SCI application to application latency   : 1.8 us
>SCI application to application bandwidth : 283 MByte/sec

-- 

Best regards,

Iwao Makino
Hard Data Ltd. Tokyo branch
mailto:iwao at harddata.com
http://www.harddata.com/

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