Convex C3800 memory information

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3 total messages Started by Larry Meadows Thu, 28 Jan 1993 01:28

#20

Author: Larry Meadows
Date: Thu, 28 Jan 1993 01:28

16 lines
827 bytes

There's been a lot of recent discussion of memory bandwidth, etc.
of various super and mini-super computers, as well as workstations,
in comp.arch, etc.  I'm interested in performance parameters of
the Convex C3800 system, in particular:

	memory bandwidth (peak)
	memory bandwidth on compiled code (e.g., streams benchmark)
	effect of virtual memory on all this
	  (e.g., what is the page size, TLB size, etc).

If anyone cares to share this information I'd appreciate it.

Thanks.
-- 
Larry Meadows		The Portland Group
lfm@pgroup.com

Re: Convex C3800 memory information

#22

Author: Steve Warren
Date: Thu, 28 Jan 1993 14:03

22 lines
1518 bytes

In article <C1JIrw.BLx@pgroup.com> lfm@pgroup.com (Larry Meadows) writes:
>There's been a lot of recent discussion of memory bandwidth, etc.
>of various super and mini-super computers, as well as workstations,
>in comp.arch, etc.  I'm interested in performance parameters of
>the Convex C3800 system, in particular:
>
>	memory bandwidth (peak)

Peak bandwidth is 500MB/sec/port.

ie a C3880 with 8 memory boards has a peak bandwidth to memory
of 4 GByte/sec.

Including the Comm reg port adds another 500MB/sec to the total,
but this is not usually thought of as memory bandwidth.

Sorry, I do not know the benchmarking info you asked for.
-- 
            _.
--Steve   ._||__    Welcome to the World's First GaAs Supercomputer
  Warren   v\ *|    -----------------------------------------------
             V

Re: Convex C3800 memory information

#24

Author: Steve Warren
Date: Thu, 28 Jan 1993 19:08

15 lines
1296 bytes

In article <1993Jan28.140329.5252@news.eng.convex.com> swarren@convex.com (Steve Warren) writes:
>Peak bandwidth is 500MB/sec/port.
>
>ie a C3880 with 8 memory boards has a peak bandwidth to memory
>of 4 GByte/sec.

I have been informed by a coworker that I was calculating this
with the wrong clock speed.  The actual peak bandwidth is 480 MB/sec/port.

Sorry for any confusion.
-- 
            _.
--Steve   ._||__    Welcome to the World's First GaAs Supercomputer
  Warren   v\ *|    -----------------------------------------------
             V

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