June 2005 - Darwin-dev - lists.apple.com

Re: No space left to create named semaphores
by Jonas Maebe 22 Jun '05

22 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On 22 jun 2005, at 03:59, Tron Thomas wrote: man ipcs (didn't exist yet on 10.3 afaik) Jonas _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… What tools and technique can I use to determine how many semaphores are in use, and if there are any possible semaphore leaks? This email sent to site_archiver(a)lists.apple.com

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Re: No space left to create named semaphores
by Tron Thomas 22 Jun '05

22 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com User-agent: Mozilla Thunderbird 1.0.2 (Windows/20050317) John Francini wrote: John Francini On Jun 21, 2005, at 0:42, Tron Thomas wrote: What determines how much space is available for creating semaphores? _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/francini%40mac.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… I'm not sure if any semaphores are leaked or not. I asked the developer who works in the area that uses semaphores, and he said that most of the semaphore created by his code should exist for pretty much the life of the program. Other people may be creating semaphores that are not being deleted. I have added some logging to see if any semaphores are being deleted. So, far I haven't seen any evidence of semaphore deletion. What tools and technique can I use to determine how many semaphores are in use, and if there are any possible semaphore leaks? The semaphore space is controlled by the kern.sysv.sem* set of sysctl(8) values. The question, though, is how many semaphores is the program using, and is it "leaking" semaphores? The default value appears to be 87381 in Panther. At work we have a program running on Mac OS X that routinely calls sem_open to created named semaphores. After the program has run for a while the sem_open command will fail with the result ENOSPC and the corresponding error string "No space left on device". This email sent to francini(a)mac.com This email sent to site_archiver(a)lists.apple.com

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Re: Question about fsync and fcntl with F_FULLSYNC
by Chris Sarcone 21 Jun '05

21 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: No space left to create named semaphores
by John Francini 21 Jun '05

21 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com John Francini On Jun 21, 2005, at 0:42, Tron Thomas wrote: What determines how much space is available for creating semaphores? _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/francini%40mac.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… The semaphore space is controlled by the kern.sysv.sem* set of sysctl(8) values. The question, though, is how many semaphores is the program using, and is it "leaking" semaphores? The default value appears to be 87381 in Panther. At work we have a program running on Mac OS X that routinely calls sem_open to created named semaphores. After the program has run for a while the sem_open command will fail with the result ENOSPC and the corresponding error string "No space left on device". This email sent to francini(a)mac.com This email sent to site_archiver(a)lists.apple.com

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Re: Tape support on Mac OS X?
by Al Kirkus 21 Jun '05

21 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi. It reads and writes stdio to/from tape plus a few other utilities. I use this app to control several SCSI DLT drives from a G4 Xserve. Hope that helps, Al On Jun 21, 2005, at 4:50 AM, Graham J Lee wrote: On 21 Jun 2005, at 06:40, Peter Seebach wrote: _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/al%40kirkus.org This email sent to al(a)kirkus.org _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… I wrote a basic tape driver available here: http://www.kirkus.org/ tapecontrol.html (source and binary). It is very basic but it works for my needs and it can also give you an idea of the way OSX handles tape drive support. I have old SCSI tape drives, but they don't show up using my firewire to SCSI adapter, and I don't have a SCSI controller that will work at all in my G5. Does anyone out there have a tape device which actually shows up in /dev? If so, what does it show up as? Correct me if I'm wrong [please do - I have an LTO Ultrium drive that needs plugging into an XServe] but there hasn't been any support for the UNIX SCSI tape driver (i.e. /dev/st) in OS X or Darwin since 10.0 (OS X Server 1.x had it, IIRC). Unfortunately this means that without some extension (probably commercial) you can't just use a SCSI tape :-( There was an SF project to create a tape driver, http:// sourceforge.net/projects/darwin-tape, created a few years ago but so far no releases - anyone know the status of it? -- Graham Lee GPG Key ID: 01D5B9D8 UNIX Systems Manager, Oxford Physics Practical Course Coordinator, UKUUG Apple SIG (http://lists.ukuug.org/mailman/ listinfo/apple-sig) Technical bod, Oxford Mac Users' Group (http://www.oxmug.org) This email sent to site_archiver(a)lists.apple.com

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Re: Tape support on Mac OS X?
by Graham J Lee 21 Jun '05

21 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On 21 Jun 2005, at 06:40, Peter Seebach wrote: _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… I have old SCSI tape drives, but they don't show up using my firewire to SCSI adapter, and I don't have a SCSI controller that will work at all in my G5. Does anyone out there have a tape device which actually shows up in /dev? If so, what does it show up as? Correct me if I'm wrong [please do - I have an LTO Ultrium drive that needs plugging into an XServe] but there hasn't been any support for the UNIX SCSI tape driver (i.e. /dev/st) in OS X or Darwin since 10.0 (OS X Server 1.x had it, IIRC). Unfortunately this means that without some extension (probably commercial) you can't just use a SCSI tape :-( There was an SF project to create a tape driver, http://sourceforge.net/projects/darwin-tape, created a few years ago but so far no releases - anyone know the status of it? -- Graham Lee GPG Key ID: 01D5B9D8 UNIX Systems Manager, Oxford Physics Practical Course Coordinator, UKUUG Apple SIG (http://lists.ukuug.org/mailman/listinfo/apple-sig) Technical bod, Oxford Mac Users' Group (http://www.oxmug.org) This email sent to site_archiver(a)lists.apple.com

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Tape support on Mac OS X?
by seebs＠plethora.net 21 Jun '05

21 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com I have old SCSI tape drives, but they don't show up using my firewire to SCSI adapter, and I don't have a SCSI controller that will work at all in my G5. Does anyone out there have a tape device which actually shows up in /dev? If so, what does it show up as? -s _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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No space left to create named semaphores
by Tron Thomas 21 Jun '05

21 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com User-agent: Mozilla Thunderbird 1.0.2 (Windows/20050317) What determines how much space is available for creating semaphores? _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… At work we have a program running on Mac OS X that routinely calls sem_open to created named semaphores. After the program has run for a while the sem_open command will fail with the result ENOSPC and the corresponding error string "No space left on device". This email sent to site_archiver(a)lists.apple.com

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Question about fsync and fcntl with F_FULLSYNC
by Andrew Johnson 21 Jun '05

21 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Andrew Johnson Network Analyst United Nurses of Alberta _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… According to the man page F-FULLSYNC doesn't work with some firewire drives, is that the only limitation? I know Dominic has said that it will work with all Apple provided drives but will it work with third party ATA drives? This email sent to site_archiver(a)lists.apple.com

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Problem prebinding dynamic library
by Oliver Kohlbacher 19 Jun '05

19 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com User-agent: Mozilla Thunderbird 1.0.2 (Windows/20050317) Hi there, a brief question concerning the Darwin (Panther) linker: when linking a dynamic library, I get an error message which I hav never seen before (and not only I: it is unknown to ADC and Google as well!): ld: warning prebinding disabled because output is too large (limitation of the 24-bit r_address field of scattered relocation entries) While I understand the error message in principle, I was unable to figure out what to do about it. Has anybody here an idea how I can stil prebind that library (despite its size of 38 MB)? Anything I can do the reduce its size? Thanks for your help, Oliver -- Prof. Dr. Oliver Kohlbacher (oliver.kohlbacher(a)uni-tuebingen.de) Dept. for Simulation of Biological Systems, WSI, University of Tübingen Room C317, Sand 14, 72076 Tübingen, Germany phone: +49-7071-29-70457 fax: +49-7071-29-5152 _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… The linker line leading to this error was: /usr/bin/g++ -prebind -seg1addr 0x20000000 -headerpad_max_install_names -compatibility_version 1.1 -current_version 1.1. -dynamiclib -o libBALL.dylib `cat libBALL.objects`-framework Python -lm This email sent to site_archiver(a)lists.apple.com

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