64-bit Linux Binary Compatibility (for Matlab)
Hello all, Simple question - am I able to run 64-bit linux binaries using the ABI emulation under FreeBSD 7.0 amd64? In the NOTES for amd64 kernel configuration the COMPAT_LINUX option is commented out, but I don't understand the explanation at the top of the section: #XXX keep these here for now and reactivate when support for emulating #XXX these 32 bit binaries is added. For 32-bit there is already the COMPAT_LINUX32 option, no? This is the first time that I've dealt with linux compatibility in FreeBSD, so would appreciate some pointers. The goal is to get Matlab running in 64-bit mode. Some of the algorithms that my colleagues need to execute were crashing the software, and they assumed that it was due to a limitation of virtual memory that is available under 32-bit. Apparently Matlab tries to allocate a continuous chunk of memory, and we needed to upgrade to 64-bit hardware to give it access to more than 1GB of memory, which is about the most that it was able to get before. It's a lousy explanation, but I wasn't employed at this place when this diagnosis was made. If anyone else here is running Matlab on FreeBSD, I'd welcome any pointers you can give me for setting it up. Right now, I'm following the steps listed in the handbook. As a side note - is it, in fact, the case that Matlab x86_64 will run slower than the 32-bit version (http://osdir.com/ml/netbsd.ports.x86-64/2006-07/msg00061.html)? - Max ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 64-bit Linux Binary Compatibility (for Matlab)
Maxim Khitrov wrote: Hello all, Simple question - am I able to run 64-bit linux binaries using the ABI emulation under FreeBSD 7.0 amd64? In the NOTES for amd64 kernel configuration the COMPAT_LINUX option is commented out, but I don't understand the explanation at the top of the section: Not yet, there is a summer of code project working on this but I don't think it is complete. You can, of course, run 32-bit linux binaries on amd64. If anyone else here is running Matlab on FreeBSD, I'd welcome any pointers you can give me for setting it up. Right now, I'm following the steps listed in the handbook. As a side note - is it, in fact, the case that Matlab x86_64 will run slower than the 32-bit version (http://osdir.com/ml/netbsd.ports.x86-64/2006-07/msg00061.html)? Depends what you use it for, presumably. Kris ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 64-bit Linux Binary Compatibility (for Matlab)
If you are looking for batch processing, octave may be an option. The objective was to be as compatible with Matlab as possible. There wasn't any gui available when I last looked at this program. As a side note, I found the following from the Matlab site hilarious : FreeBSD distributions of Linux are not compatible with MATLAB 6.0 (R12). Makes me wonder how good the Linux version of Matlab is. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 64-bit Linux Binary Compatibility (for Matlab)
On Thu, Aug 7, 2008 at 10:37 AM, Kris Kennaway [EMAIL PROTECTED] wrote: Maxim Khitrov wrote: Hello all, Simple question - am I able to run 64-bit linux binaries using the ABI emulation under FreeBSD 7.0 amd64? In the NOTES for amd64 kernel configuration the COMPAT_LINUX option is commented out, but I don't understand the explanation at the top of the section: Not yet, there is a summer of code project working on this but I don't think it is complete. You can, of course, run 32-bit linux binaries on amd64. Kris Thanks, I'll give it a try under 32-bit and see if the simple change from Linux to FreeBSD as host OS is enough to fix the problems we were having. - Max ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 64-bit Linux Binary Compatibility (for Matlab)
On Thu, Aug 7, 2008 at 10:52 AM, Sean Cavanaugh [EMAIL PROTECTED] wrote: Date: Thu, 7 Aug 2008 09:47:45 -0400 From: [EMAIL PROTECTED] To: freebsd-questions@freebsd.org Subject: 64-bit Linux Binary Compatibility (for Matlab) Apparently Matlab tries to allocate a continuous chunk of memory, and we needed to upgrade to 64-bit hardware to give it access to more than 1GB of memory, which is about the most that it was able to get before. It's a lousy explanation, but I wasn't employed at this place when this diagnosis was made. running 32-bit gives you access to 4GB of RAM, not 1. there is some address space that is used up by hardware such as video cards that will reduce that number reported by the OS. I know that, the key word there is continuous space. In either case, I'm only repeating what was said to me as the reason for purchasing a brand new server - run in 64-bit mode to give Matlab more virtual memory. It may end up being the case that the problem was completely unrelated. I'll know in about an hour :) - Max ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 64-bit Linux Binary Compatibility (for Matlab)
Maxim Khitrov wrote: On Thu, Aug 7, 2008 at 10:52 AM, Sean Cavanaugh [EMAIL PROTECTED] wrote: Date: Thu, 7 Aug 2008 09:47:45 -0400 From: [EMAIL PROTECTED] To: freebsd-questions@freebsd.org Subject: 64-bit Linux Binary Compatibility (for Matlab) Apparently Matlab tries to allocate a continuous chunk of memory, and we needed to upgrade to 64-bit hardware to give it access to more than 1GB of memory, which is about the most that it was able to get before. It's a lousy explanation, but I wasn't employed at this place when this diagnosis was made. running 32-bit gives you access to 4GB of RAM, not 1. there is some address space that is used up by hardware such as video cards that will reduce that number reported by the OS. I know that, the key word there is continuous space. It still doesn't make any sense; processes on i386 have up to 3GB (by default) of address space to do with what they wish. Perhaps someone forgot to increase the maxdsiz resource limit? Kris ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 64-bit Linux Binary Compatibility (for Matlab)
Date: Thu, 7 Aug 2008 09:47:45 -0400 From: [EMAIL PROTECTED] To: freebsd-questions@freebsd.org Apparently Matlab tries to allocate a continuous chunk of memory, and we needed to upgrade to 64-bit hardware to give it access to more than 1GB of memory, which is about the most that it was able to get before. It's a lousy explanation, but I wasn't employed at this place when this diagnosis was made. Large contiguous allocations have to occur during or soon after booting because of memory fragmentation. I can see that larger memory configurations on a 64 bit OS has a better chance of allocating big chunks like this. Make sure you have much more than 4G RAM since some hardware needs memory below 4GB, and the contiguous allocation at boot favors memory towards the top of the 4GB range. --Mark Tinguely. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 64-bit Linux Binary Compatibility (for Matlab)
Mark Tinguely wrote: Date: Thu, 7 Aug 2008 09:47:45 -0400 From: [EMAIL PROTECTED] To: freebsd-questions@freebsd.org Apparently Matlab tries to allocate a continuous chunk of memory, and we needed to upgrade to 64-bit hardware to give it access to more than 1GB of memory, which is about the most that it was able to get before. It's a lousy explanation, but I wasn't employed at this place when this diagnosis was made. Large contiguous allocations have to occur during or soon after booting because of memory fragmentation. To the best of my knowledge matlab does not run in the kernel and use contigmalloc() ;-) User applications in UNIX use *virtual* memory. Kris ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: 64-bit Linux Binary Compatibility (for Matlab)
On Thursday 07 August 2008, David Gurvich wrote: If you are looking for batch processing, octave may be an option. The objective was to be as compatible with Matlab as possible. There wasn't any gui available when I last looked at this program. There's math/koctave, which is a GUI for some definition of G. As a side note, I found the following from the Matlab site hilarious : FreeBSD distributions of Linux are not compatible with MATLAB 6.0 (R12). Makes me wonder how good the Linux version of Matlab is. Indeed :-) -- Pieter de Goeje ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
