Article View: comp.arch
Article #13268The serial bottleneck
From: reid
Date: Sun, 22 Mar 1987 23:08
Date: Sun, 22 Mar 1987 23:08
25 lines
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1625 bytes
In article <505@cpocd2.UUCP>, howard@cpocd2.UUCP (Howard A. Landman) writes:
> We have an existence proof that the serial bottleneck can be made to go
> away. It's called the human brain. So there's still hope!
> Howard A. Landman
> ...!intelca!mipos3!cpocd2!howard
If you check out some of Hillis' Connection Machine references (like the
ones in the recent (Jan. 87, I think) CACM), he points out that there are
problems which are provably serial - that is, which cannot be speeded up no
matter how many processors you have.
The simple solution is just to not run these problems on your
super-multiprocessor.
Another recent poster made a more important point - when large-scale
multiprocessors become general-purpose enough to handle context switching, a
serial section in one process will simply free up all the other processors
to run something else at the same time.
- irving reid -
--
reid@sask.uucp {alberta, ihnp4, utcsri}!sask!reid
What the world REALLY needs is a good Automatic Bicycle Sharpener.
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watnot!watmath!clyde!rutgers!ames!ptsfa!ihnp4!alberta!sask!reid From: reid@sask.UUCP Newsgroups: comp.arch Subject: The serial bottleneck Message-ID: <648@sask.UUCP> Date: Sun, 22-Mar-87 18:08:43 EST Article-I.D.: sask.648 Posted: Sun Mar 22 18:08:43 1987 Date-Received: Wed, 25-Mar-87 01:19:39 EST References: <492@cpocd2.UUCP> <43700014@uicsrd> <505@cpocd2.UUCP> Organization: University of Saskatchewan Lines: 25 Summary: There are inherently serial problems