Jorgen Grahn wrote: > On Tue, 06 Sep 2005 08:57:14 +0100, Michael Sparks <[EMAIL PROTECTED]> > wrote: ... >> Are you so sure? I suspect this is due to you being used to writing code >> that is designed for a single CPU system. What if you're basic model of >> system creation changed to include system composition as well as >> function calls? Then each part of the system you compose can potentially >> run on a different CPU. Take the following for example: > ... >> It probably looks strange, but it's really just a logical extension of >> the Unix command line's pipelines to allow multiple pipelines. Similarly, >> from a unix command line perspective, the following will automatically >> take advantage of all the CPU's I have available: >> >> (find |while read i; do md5sum $i; done|cut -b-32) 2>/dev/null |sort >> >> And a) most unix sys admins I know find that easy (probably the above >> laughable) b) given a multiprocessor system will probably try to maximise >> pipelining c) I see no reason why sys admins should be the only people >> writing programs who use concurrency without thinking about it :-) > > Nitpick: not all Unix users are sysadmins ;-) Some Unix sysadmins actually > have real users, and the clued users use the same tools. I used the 'make > -j3' example elsewhere in the thread (I hadn't read this posting when I > responded there).
I simply picked a group that do this often :-) The example pipeline I gave above is I admit a particularly dire one. Things like the following are far more silly: # rm file; fortune | tee file | wc | cat - file 3 16 110 Bubble Memory, n.: A derogatory term, usually referring to a person's intelligence. See also "vacuum tube". And # (rm file; (while [ ! -s file ]; do echo >/dev/null; done; cat file |wc) & fortune | tee file) 2>/dev/null Yea, though I walk through the valley of the shadow of APL, I shall fear no evil, for I can string six primitive monadic and dyadic operators together. -- Steve Higgins # 4 31 171 > It seems to me that there must be a flaw in your arguments, but I can't > seem to find it ;-) Sorry, but that's probably the funniest thing I've read all day :-) Best Regards, Michael. -- http://mail.python.org/mailman/listinfo/python-list