Date: Fri, 21 Jun 1996 20:34:40 -0700 From: Thomas Pfenning <thomaspf@microsoft.com> To: "'davidg@Root.COM'" <davidg@Root.COM>, "'James E. [Jed] Donnelley'" <jed@webstart.com> Cc: "'smp@freebsd.org'" <smp@freebsd.org>, "'jed@llnl.gov'" <jed@llnl.gov> Subject: RE: SMP version? Message-ID: <c=US%a=_%p=msft%l=RED-81-MSG-960622033440Z-8635@abash1.microsoft.com>
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You might want to have a look at the work Ron Minnich is doing with FreeBSD and his distributed shared memory implementation. ftp://ftp.sarnoff.com/pub/mnfs/www/docs/cluster.html Cheers Thomas >---------- >From: James E. [Jed] Donnelley[SMTP:jed@webstart.com] >Sent: Friday, June 21, 1996 7:50 PM >To: davidg@Root.COM >Cc: smp@freebsd.org; jed@llnl.gov >Subject: Re: SMP version? > >At 05:38 PM 6/21/96 -0700, you wrote: >>>I am looking for a symmetric multiprocessing version >>>of Unix that I can get sources to. Do you know if there >>>is such a version of FreeBSD (or Linux? ;-) available? >>> >>>Sorry for the "out of the blue" message. My application >>>is a Scalable Coherent Interface (SCI) shared memory >>>multiprocessor research project based on some unique >>>optical networking technology at Lawrence Livermore >>>National Laboratory. >> >> We (the FreeBSD project) are just starting our work on SMP support. We >>have a working single-kernel-lock implementation and if the sources aren't >>available for it now, they will be in a week or two. It's my understanding >>that similar progress has been made in Linux, but I'm not associated with >>that effort so I don't know its status. >> If you're interested, I can put you in touch with the people working on >>it...in fact, you can send email to smp@freebsd.org to contact the >>appropriate >>people. >> Good luck on your project. > >Do you (either of you) happen to know if there is a facility in >this system (FreeBSD for an SMP) for a single shared memory >"multiprocess." That is for multiprocessing on a single shared >memory image (with separate register sets)? Is there a defined >Posix interface to such memory sharing (beyond the mechanism that >I have seen in System V)? Any documentation that you could point >us at on this topic would be appreciated. > >I am trying to estimate the cost of using FreeBSD to support such >shared >memory multiprocessing on an Intel/SCI based shared memory >multiprocessor. >We need to have the ability to run a single "job" using shared >memory on multiple processes to make the effort worthwhile. > >Assuming this sort of work would make sense, is there a community >that we could collaborate with and potentially contribute code to? > >Thanks for any reply. > >--Jed http://www.webstart.com/cc/jed-signature.html > >
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