Pthread_create Error Cannot Allocate Memory
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Search HCL Search Reviews Search ISOs Go to Page... LinuxQuestions.org > Forums > Non-*NIX Forums > Programming pthread_create Cannot allocate memory error code 12 User Name Remember Me? pthread_create_detached Password Programming This forum is for all programming questions. The question does pthread_detach not have to be directly related to Linux and any language is fair game. Notices Welcome to LinuxQuestions.org, a pthread_join friendly and active Linux Community. You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced pthread_cancel search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today! Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. Are you new to LinuxQuestions.org? Visit the following links: Site Howto | Site FAQ | Sitemap | Register Now If you have any problems with the
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up pthread_create fails with ENOMEM on low free memory scenario up vote 3 down vote favorite 2 I have a SH4 board, http://www.linuxquestions.org/questions/programming-9/pthread_create-cannot-allocate-memory-error-code-12-a-486157/ here are the specs... uname -a Linux LINUX7109 2.6.23.17_stm23_A18B-HMP_7109-STSDK #1 PREEMPT Fri Aug 6 16:08:19 ART 2010 sh4 unknown and suppose I have eaten pretty much all the memory, and have only 9 MB left. free total used free shared buffers cached Mem: 48072 42276 5796 0 172 3264 -/+ buffers/cache: 38840 9232 Swap: 0 0 0 Now, when I try to launch a single thread with default stack size (8 MB) the pthread_create http://stackoverflow.com/questions/7167986/pthread-create-fails-with-enomem-on-low-free-memory-scenario fails with ENOMEM. If I strace my test code, I can see that the function that is failing is mmap: old_mmap(NULL, 8388608, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = -1 ENOMEM (Cannot allocate memory) However, when I set the stack size to a lower value using ulimit -s: ulimit -s 7500 I can now launch 10 threads. Each thread does not allocate anything, so it is only consuming the minimum overhead (aprox. 8 kb per thread, right?). So, my question is: Knowing that mmap doesnt actually consume the memory, Why is pthread_create() (or mmap) failing when memory available is below the thread stack size ? c linux pthreads share|improve this question edited Aug 23 '11 at 22:03 asked Aug 23 '11 at 21:47 Ezequiel Garcia 340112 add a comment| 4 Answers 4 active oldest votes up vote 6 down vote The VM setting /proc/sys/vm/overcommit_memory (aka. sysctl vm.overcommit_memory) controls whether Linux is willing to hand out more address space than the combined RAM+swap of the machine. (Of course, if you actually try to access that much memory, something will crash. Try a search on "linux oom-killer"...) The default for this setting is 0. I am going to speculate that someone set it to something else on your system. share|improve this answer answered Aug 24 '11 at 1:06 Nemo 45.3k772118 vm/over
Get Kubuntu Get Xubuntu Get Lubuntu Get UbuntuStudio Get Mythbuntu Get Edubuntu Get Ubuntu-GNOME Get UbuntuKylin Ubuntu Code of Conduct Ubuntu Wiki Community Wiki Other Support Launchpad Answers https://ubuntuforums.org/showthread.php?t=2210828 Ubuntu IRC Support AskUbuntu Official Documentation User Documentation Social Media Facebook Twitter Useful Links Distrowatch Bugs: Ubuntu PPAs: Ubuntu Web Upd8: Ubuntu OMG! Ubuntu Ubuntu Insights Planet Ubuntu Activity Page Please read https://groups.google.com/d/msg/golang-nuts/KT2GBiyUzR0/14gB3kqxI2gJ before SSO login Advanced Search Forum The Ubuntu Forum Community Ubuntu Specialised Support Development & Programming Programming Talk [SOLVED] segmentation fault in create_pthread Having an Issue With Posting ? Do you want pthread_create error to help us debug the posting issues ? < is the place to report it, thanks ! Results 1 to 3 of 3 Thread: segmentation fault in create_pthread Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode March 13th, 2014 #1 ken18 View Profile View Forum Posts Private Message Just Give Me the Beans! pthread_create error cannot Join Date Feb 2014 Beans 71 DistroUbuntu 14.04 Trusty Tahr segmentation fault in create_pthread Trying to learn about pthread and am getting a segmentation fault using the following program. Any idea why the segmentation fault? Code: #include GoogleВойтиСкрытые поляПоиск групп или сообщений