Comments on: Undocumented profiler options http://undocumentedmatlab.com/blog/undocumented-profiler-options/ Charting Matlab's unsupported hidden underbelly Thu, 09 Feb 2012 09:23:08 +0000 hourly 1 http://wordpress.org/?v=3.1.1 By: Matlab-Java memory leaks, performance | Undocumented Matlabhttp://undocumentedmatlab.com/blog/undocumented-profiler-options/#comment-71570 Matlab-Java memory leaks, performance | Undocumented Matlab Fri, 20 Jan 2012 00:56:31 +0000 http://undocumentedmatlab.com/?p=143#comment-71570 [...] Matlab Profiler's undocumented memory profiling option helped me quite a bit, as well as lots of intuition and trial-and-error. Detecting memory leak is never easy [...] [...] Matlab Profiler’s undocumented memory profiling option helped me quite a bit, as well as lots of intuition and trial-and-error. Detecting memory leak is never easy [...]

]]> By: Davehttp://undocumentedmatlab.com/blog/undocumented-profiler-options/#comment-61266 Dave Tue, 08 Nov 2011 04:12:33 +0000 http://undocumentedmatlab.com/?p=143#comment-61266 Does this work correctly on Linux?I got a nonsensical memory value for a mex function (10^16 kB). It is using its own memory allocation internally, though... Does this work correctly on Linux?

I got a nonsensical memory value for a mex function (10^16 kB). It is using its own memory allocation internally, though…

]]> By: Chrishttp://undocumentedmatlab.com/blog/undocumented-profiler-options/#comment-60913 Chris Thu, 03 Nov 2011 22:16:15 +0000 http://undocumentedmatlab.com/?p=143#comment-60913 The -memory option is a great idea. But as @DA states above it can really slow the profiler down. I had to turn it off, with the -nomemory option, to get reasonable performance. The -memory option is a great idea. But as @DA states above it can really slow the profiler down. I had to turn it off, with the -nomemory option, to get reasonable performance.

]]> By: DAhttp://undocumentedmatlab.com/blog/undocumented-profiler-options/#comment-32852 DA Thu, 10 Feb 2011 11:07:44 +0000 http://undocumentedmatlab.com/?p=143#comment-32852 Memory profiling is great, but it does seem to add a lot of overhead, potentially slowing the profiler by many orders of magnitude. Memory profiling is great, but it does seem to add a lot of overhead, potentially slowing the profiler by many orders of magnitude.

]]> By: Patrick Mineaulthttp://undocumentedmatlab.com/blog/undocumented-profiler-options/#comment-21156 Patrick Mineault Wed, 27 Oct 2010 17:46:45 +0000 http://undocumentedmatlab.com/?p=143#comment-21156 Works great over here, although sometimes gives nonsensical values for memory consumption (negative amounts or terabytes, etc.). Linux 64-bit R2009b. Works great over here, although sometimes gives nonsensical values for memory consumption (negative amounts or terabytes, etc.). Linux 64-bit R2009b.

]]> By: Yair Altmanhttp://undocumentedmatlab.com/blog/undocumented-profiler-options/#comment-8634 Yair Altman Tue, 30 Mar 2010 17:42:55 +0000 http://undocumentedmatlab.com/?p=143#comment-8634 @Matthew - please read Scott Hirsch's comment above. Scott is the Matlab product manager at MathWorks and says that they <i>"would love feedback on the memory profiling feature"</i>. Perhaps you could contact him via the attached link and explain your use-case. There might be a workaround for your Matlab version/platform. Even if not, it might benefit other users who have similar issues. If you learn anything new, please do post it here. @Matthew – please read Scott Hirsch’s comment above. Scott is the Matlab product manager at MathWorks and says that they “would love feedback on the memory profiling feature”. Perhaps you could contact him via the attached link and explain your use-case. There might be a workaround for your Matlab version/platform. Even if not, it might benefit other users who have similar issues. If you learn anything new, please do post it here.

]]> By: Matthew Davidsonhttp://undocumentedmatlab.com/blog/undocumented-profiler-options/#comment-8602 Matthew Davidson Mon, 29 Mar 2010 19:13:26 +0000 http://undocumentedmatlab.com/?p=143#comment-8602 It doesn't work for me in 2007B, OS X 10.5. It gives me the following error from callstats.m: "Support for memory tracking is not available with the current memory manager.This is unfortunate, because lack of memory profiling is one of Matlab's biggest performance gaps. As someone who works with massive neuroimaging data sets every day, good memory use is <b>more</b> important to me than CPU performance. Shaving an hour or two off an analysis is nice, but using too much memory means my analysis won't even <b>finish</b>.As an ex-professional programmer, I'd seriously considered making and selling something like this as an add-on if I wasn't in grad school.Maybe in that far-off utopia of infinite funding, I can convince my advisors to buy all the necessary copies of later matlab versions. :) It doesn’t work for me in 2007B, OS X 10.5. It gives me the following error from callstats.m: “Support for memory tracking is not available with the current memory manager.

This is unfortunate, because lack of memory profiling is one of Matlab’s biggest performance gaps. As someone who works with massive neuroimaging data sets every day, good memory use is more important to me than CPU performance. Shaving an hour or two off an analysis is nice, but using too much memory means my analysis won’t even finish.

As an ex-professional programmer, I’d seriously considered making and selling something like this as an add-on if I wasn’t in grad school.

Maybe in that far-off utopia of infinite funding, I can convince my advisors to buy all the necessary copies of later matlab versions. :)

]]> By: Markhttp://undocumentedmatlab.com/blog/undocumented-profiler-options/#comment-1719 Mark Mon, 13 Jul 2009 06:40:31 +0000 http://undocumentedmatlab.com/?p=143#comment-1719 Good Work Good Work

]]> By: tic / toc - undocumented option | Undocumented Matlabhttp://undocumentedmatlab.com/blog/undocumented-profiler-options/#comment-858 tic / toc - undocumented option | Undocumented Matlab Fri, 22 May 2009 13:12:12 +0000 http://undocumentedmatlab.com/?p=143#comment-858 [...] I have recently discussed undocumented features in Matlab’s built-in profiler. Another tool often used for ad-hoc performance profiling of Matlab code are the built-in duo functions tic and toc [...] [...] I have recently discussed undocumented features in Matlab’s built-in profiler. Another tool often used for ad-hoc performance profiling of Matlab code are the built-in duo functions tic and toc [...]

]]> By: Marcelhttp://undocumentedmatlab.com/blog/undocumented-profiler-options/#comment-780 Marcel Wed, 20 May 2009 13:07:39 +0000 http://undocumentedmatlab.com/?p=143#comment-780 Profiling the memory sounds really interresting - unfortunately it does NOT work on my computer (Win XP, Maltab R2009a)Marcel Profiling the memory sounds really interresting – unfortunately it does NOT work on my computer (Win XP, Maltab R2009a)

Marcel

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