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- Newsgroups: comp.sys.super
- Path: sparky!uunet!paladin.american.edu!darwin.sura.net!news.udel.edu!perelandra.cms.udel.edu!mccalpin
- From: mccalpin@perelandra.cms.udel.edu (John D. McCalpin)
- Subject: Re: i860 performance (was: Re: World's Most Powerful Computing Sites)
- Message-ID: <C19zxw.4C8@news.udel.edu>
- Sender: usenet@news.udel.edu
- Nntp-Posting-Host: perelandra.cms.udel.edu
- Organization: College of Marine Studies, U. Del.
- References: <1993Jan21.165159.10149@meiko.com> <1993Jan22.015827.26653@nas.nasa.gov> <C19s04.3yF@pgroup.com>
- Date: Fri, 22 Jan 1993 22:03:31 GMT
- Lines: 42
-
- In article <C19s04.3yF@pgroup.com> lfm@pgroup.com (Larry Meadows) writes:
- >>The problem is that peak mflops performance doesn't give the whole story --
- >memory bandwidth is much more important. Perhaps machines should be
- >rated by how long it takes to do a vector add, or some such measure; then
- >"super-vector" performance occurs when values can be left in vector registers.
-
- This was the motivation for my "stream" benchmark. I have not added any
- new results lately, but the code, documentation, and lots of results are
- in the anonymous ftp area of perelandra.cms.udel.edu in bench/stream/.
-
- Some tidbits:
-
- Memory Bandwidth results from STREAM_S and STREAM_D
- John D. McCalpin --- mccalpin@perelandra.cms.udel.edu
-
- Bytes Bandwidth (MB/s)
- Machine /word Copy SSCAL Sum SAXPY
- --------------- ----- -------- -------- -------- --------
- Cray YMP/C90 16 cpu 8 105497.4 104656.4 101736.1 103812.8
- Cray YMP/C90 1 cpu 8 6965.4 6965.4 9378.7 9500.7
- Cray Y/MP 8 cpu 8 19291.6 19294.2 26588.9 26802.2
- Cray Y/MP 1 cpu 8 2426.4 2426.2 3454.4 3396.9
- CM-200 8k 10 MHz 8 5251.4 5251.3 5931.4 5653.2
- CM-2 8k 7 MHz 8 3224.5 3224.5 3657.4 3494.8
- NEC SX3/44 1 cpu 8 16941.0 15640.7 22436.5 21972.2
- NEC SX3/12 1 cpu 8 8302.2 7670.9 9712.8 9712.9
- ETA-10E 8 2974.7 3010.5 4357.5 4214.8
- IBM 3090J/VF 1 cpu 8 251.9 250.1 288.5 264.6
- Convex C3420 2 cpu 8 289.1 273.1 302.7 300.3
- Convex C3410 1 cpu 8 177.6 172.5 179.0 178.4
- Convex C3220 2 cpu 8 334.3 333.0 337.3 336.5
- Convex C3210 1 cpu 8 180.1 179.4 181.4 180.8
- MIPS RC6280 8 53.5 58.2 56.5 56.5
- IBM RS6000-950 8 193.9 177.8 195.9 192.0
- HP 9000/730 8 53.3 48.0 55.4 55.4
- HP 9000/720 8 43.6 40.0 45.0 42.3
- --------------- ----- -------- -------- -------- --------
- --
- --
- John D. McCalpin mccalpin@perelandra.cms.udel.edu
- Assistant Professor mccalpin@brahms.udel.edu
- College of Marine Studies, U. Del. John.McCalpin@mvs.udel.edu
-