Subject: |
Re: PowerPC/VME64 |
From: |
Peregrine McGehee <[email protected]> |
Date: |
Fri, 22 Aug 1997 08:10:50 -1000 |
Nick,
>
> Under VxWorks I typically get a little over 30MByte/s average throughput
> in a test in which a largish message (few Mbytes) gets ping-ponged between
Thanks for the test info. For MEGACAM (32 2Kx4K thinned CCDs =
512MBytes/image) we are considering _not_ having the image data travel
on the VMEbus - epecially if we can't sustain at least a 40MByte/sec
transfer.
Current thoughts are 5 CPUs in the crate, 1 for control/status with a
Control Lan (= EPICS CA ?) interface, 4 with both Fiber Channel and
Data Lan (= PVM ?) interfaces...
Peregrine
-------------------------------------------------------------------------------
Peregrine M. McGehee http://www.cfht.hawaii.edu/~mcgehee
Telescope Control Systems Group Canada-France-Hawaii Telescope
(808) 885-3178 P.O. Box 1597, Kamuela, Hawaii 96743
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