From: Richard Liu on 3 May 2010 11:28 Yes, it is the latest i7 processor. I now have 8 workers running, and the cpu usage is 67%. So I guess there is still room for improvement. "John " <John(a)REMOVEMEtwisthink.com> wrote in message <hrmmhl$lqb$1(a)fred.mathworks.com>... > You probably won't get much more performance from 12 threads than 6 since there are only 6 physical cores (I'm guessing this is the latest i7 processor). > > If I recall the difference is only a couple percent, best-case.
From: Richard Liu on 3 May 2010 11:35 Steven, Chapter 2 of that document. My impression of the whole instruction is that it's about how to run parallel programming using multiple computers. I'd be interested in some instructions on how to do it on one local computer which could operate beyond the 8 worker limits set by the parallel computing toolbox. Again, I could be missing something here... "Steven Lord" <slord(a)mathworks.com> wrote in message <hrmocn$qg8$1(a)fred.mathworks.com>... > > "Richard Liu" <richardkailiu(a)gmail.com> wrote in message > news:hrmmgb$j5r$1(a)fred.mathworks.com... > > Steven, > > Thank you so much. Here is the URL of the documentation page I browsed: > > http://www.mathworks.com/access/helpdesk/help/pdf_doc/mdce/mdce.pdf > > > > Maybe I am missing something here. But the discussion in the documentation > > seems to be concerned with server and remote workers. The case here is > > that I have one local computer with the potential of running 12 workers > > max. > > I look forward to hearing from you. richard > > Okay ... do you remember what page (or even what chapter) of that document > gave you the impression that MATLAB Distributed Computing Server was only > necessary for cross-machine clusters so that I can give the documentation > staff somewhere to focus their clarification work? > > -- > Steve Lord > slord(a)mathworks.com > comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ >
From: Steven Lord on 4 May 2010 10:26 "Richard Liu" <richardkailiu(a)gmail.com> wrote in message news:hrmqfo$iq8$1(a)fred.mathworks.com... > Steven, > Chapter 2 of that document. My impression of the whole instruction is > that it's about how to run parallel programming using multiple computers. > I'd be interested in some instructions on how to do it on one local > computer which could operate beyond the 8 worker limits set by the > parallel computing toolbox. > Again, I could be missing something here... I don't know where those instructions are, so I'm afraid the only suggestion I have is for you to contact our Technical Support staff. They should be able to help you determine what you need to do to set things up. But I will send your feedback on the documentation to the documentation staff for their consideration. -- Steve Lord slord(a)mathworks.com comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ
From: Bobby Cheng on 5 May 2010 09:55 You may want to try using 6 workers since you have only 6 physical cores. ---Bob. "Richard Liu" <richardkailiu(a)gmail.com> wrote in message news:hrmq26$k0l$1(a)fred.mathworks.com... > Yes, it is the latest i7 processor. I now have 8 workers running, and the > cpu usage is 67%. So I guess there is still room for improvement. "John " > <John(a)REMOVEMEtwisthink.com> wrote in message > <hrmmhl$lqb$1(a)fred.mathworks.com>... >> You probably won't get much more performance from 12 threads than 6 since >> there are only 6 physical cores (I'm guessing this is the latest i7 >> processor). >> >> If I recall the difference is only a couple percent, best-case. >
From: Adnan Abdulally on 3 Jun 2010 13:48 "Richard Liu" <richardkailiu(a)gmail.com> wrote in message <hrhupd$2v3$1(a)fred.mathworks.com>... > Hi, > I just bought a six-core desktop (12 Threads) and discovered that the maximum worker allowed by the parallel computing toolbox is eight workers. This is really disappointing, and I am just wondering if there is anyway to fully utilize the 12 processes and have 12 workers on one local machine. I browsed the help guide for the Distributed Computing Server toolbox and it seems it only works when you'd like to create workers on remote computers. > > Your help is greatly appreciated. Thank you! > richard I am in the same boat. This is very disappointing and really stupid of matlab to limit the amount of workers on a local computer, even if you have the parallel toolbox. Seems like a money grubbing scheme to me. I currently have a dual 6-core workstation (12 cores - 24 threads) and i can only use 8 threads. If i turn hyperthreading off i can use 8 cores, but thats still 4 cores im not using. I didnt pay $1500 more for the extra 4 cores to not be able to use them because of a purposeful software limitation. Kind of makes me want to go back to using fortran and use openMP which is free and is much more feature rich.
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