Re[2]: [Fwd: [SSI-users] moving data around]
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From: Ron C. <ro...@de...> - 2004-07-03 13:34:45
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Hi David, Now this sounds really interesting. Does that mean that I can just allocated a chunk of memory somewhere that is accessible by all nodes ? For example every slave node allocates a chunk of (local) memory that can be accessed by the master node ? That is something I have been wondering (and looking for). Is there an example available of how to do that ? thanks, Ron > Finally, you could use standard shared memory IPC. >Currently, you need to have a separate shared memory segment for each >node. Otherwise, the performance will be really bad because we don't >independently lock individual pages yet. > >David > >On Jul 2, 2004, at 3:44 PM, Brian J. Watson wrote: > >> Dave- >> >> Can you answer his question? I considered doing so, but I don't >> understand your CFS implementation well enough to know exactly what's >> killing his performance. >> >> A suggestion I considered is just using a pipe for each child to >> report its calculations to the master, since I don't think the >> children need to interact with each other. >> >> Thanks, >> >> Brian >> >> >> -------- Original Message -------- >> Subject: [SSI-users] moving data around >> Date: Mon, 28 Jun 2004 08:59:52 CT >> From: Ron Croonenberg <ro...@de...> >> To: ssi...@li... >> >> Hello all, >> >> I am writing something that calculates a fractal on a 13 node cluster. >> >> I have everything working (something that executes programs on all the >> slave >> nodes that do the iterations and a program that runs on the main node >> to >> "collect" the data and display the picture.) >> >> I have all the slave nodes dump their data in a file. The calculations >> seem to >> be pretty quick however writing the data seems to be very slow. >> >> Is there a way to do things differently ? For example can I access an >> allocated >> chunk of memory on a different node ? >> >> thanks, >> >> Ron >> >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> 1879: >> Thomas Edison gets an idea, and his brother Timmy says, >> "Hey, what's that thing over your head? >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> Ron Croonenberg | Phone: 1 765 658 4761 >> Technology Coordinator | Fax: 1 765 658 4732 >> | >> Department of ComputerScience | e-mail : ronc@DePauw.edu >> DePauw University | >> Julian Science & Math Center | >> 602 South College Ave. | >> Greencastle, IN 46135 | >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> http://www.depauw.edu/acad/computer/RonCroonenberg.asp >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> >> >> ------------------------------------------------------- >> This SF.Net email sponsored by Black Hat Briefings & Training. >> Attend Black Hat Briefings & Training, Las Vegas July 24-29 - >> digital self defense, top technical experts, no vendor pitches, >> unmatched networking opportunities. Visit www.blackhat.com >> _______________________________________________ >> Ssic-linux-users mailing list >> Ssi...@li... >> https://lists.sourceforge.net/lists/listinfo/ssic-linux-users >> >> >> >> >> >David B. Zafman >mailto:da...@za... >If Bill Gates had a dime for every time a Windows box crashed... >..Oh, wait a minute, he already does. > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D 1879: Thomas Edison gets an idea, and his brother Timmy says, "Hey, what's that thing over your head? =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Ron Croonenberg | Phone: 1 765 658 4761 Technology Coordinator | Fax: 1 765 658 4732 | Department of ComputerScience | e-mail : ronc@DePauw.edu DePauw University | Julian Science & Math Center | 602 South College Ave. | Greencastle, IN 46135 | =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D http://www.depauw.edu/acad/computer/RonCroonenberg.asp =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D |