Re: Short Vectors Versus Long Vectors

aph@littlepinkcloud.invalid wrote:

MitchAlsup1 <mitchalsup@aol.com> wrote:

Let us face facts:: en the large; vector machines are DMA devices
that happen to mangle the data on thee way through.
 John Savard wrote:
 

And if memory bandwidth issues make Cray-style vector machines
impractical, then wouldn't it be even worse for GPUs?

 a) It is not pure BW but BW at a latency less than K. CRAY-1 was about 16-cycles (DRAM)

DRAM for CRAY-1 doesn't sound right. Intel made 1024-bit DRAM in 1970,
but it was pretty flaky and not very fast. I think the CRAY-1 used
Fairchild 10K ECL 10ns SRAM.

That was CRAY-1s s stands for SRAM.
Also note 16 cycles at 12.5ns (200ns) is plenty of time for even
early RAS/CAS DRAM.

Andrew,