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it simply won't accept my struct as a pointer. Compactness of the open and closed unit intervals Hacker used picture upload to get PHP code into my site Is there any term for this when movie doesn't end as its If you'd like to contribute content, let us know. Only when a terminated joinable thread has been joined are the last of its resources released back to the system.

In the 2.4 kernels I've examined this limit appears to be 256 threads for each parent process(?). Browse other questions tagged c pthreads or ask your own question. Cincerly Niklas HoumanJanuary 12th, 2007, 07:14 PMhi there; I had a quick question, I ran the code and the error value of pthread_create is 12 at the time that it fails Now I encountered that after about a few hundred connects of which each starts a thread which in my test cas closes after less then a second due to client disconnect,


There is no problem I can see in the current code. I know 12 is ENOMEM, and "that should be that", but it's not.. Can someone please tell me why a process can't open a thread as many times as needed? Here we are concern exclusively with current, upstream code.

  • It decided to eliminate the errno deficiencies all together for the Pthreads APIs by changing the way errors are reported.
  • Boyfriend is coowner with sister, wants to move out Are people of Nordic Nations "happier, healthier" with "a higher standard of living overall than Americans"?
  • Is there a mistake in the API or is my test-code wrong?
  • http://sourceware.org/git/?p=glibc.git;a=blob;f=nptl/allocatestack.c;h=ba251b91626cd1463a19f9db3fbed85eec585897;hb=be9c5e8b2014bdbf724f206bb25249c67115db49#l636 mprotect() returns ENOMEM if you've hit the maximum number of mappings for a process (which on Linux is currently is 65050).
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  • Sourceware Bugzilla – Bug386 pthread_create returns ENOMEM but should return EAGAIN Last modified: 2014-05-28 19:44:29 UTC Home | New | Browse | Search | [?] | Reports | Requests | Help
  • It simply won't allow me to pass a struct for some reason; it returns error #12.
  • The thread is created executing start_routine with arg as its sole argument.

also, on my machine, i found around 500 writes can be performed in thread mode per second. but when I run it from the command line, it returns 12. Oh well, they do not use errno… The Problem: Before the advent of Pthreads, POSIX functions used to return -1 on error, and set the corresponding error code in the global Luckily I was able to shrink the problem down to a very small piece of Code: #include #include void* mythread(void* ptr){ std::cout<<"Thread started"<

Changing thickness of outline in QGIS more hot questions question feed lang-c about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Pthread_exit Make sure you're not allocating too many threads, and be sure to pthread_join threads when they're done (or use pthread_detach). But due to some reason thread holding the lock died .So when other thread tries to lock the mutex. http://www.linuxquestions.org/questions/programming-9/pthread_create-cannot-allocate-memory-error-code-12-a-486157/ I was wondering why cant the program allocate more than 382 simultanoues threads?

A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. Generated Sun, 08 Jan 2017 20:58:56 GMT by s_hp87 (squid/3.5.23) If yes, provide a test case. The new thread terminates in one of the following ways: * It calls pthread_exit(3), specifying an exit status value that is available to another thread in the same process that calls


If attr is NULL, then the thread is created with default attributes. a signal handler may change the errno value between the point a function set errno, and the point where you check the errno variable. Pthread_join Last edited on Sep 19, 2012 at 10:26am UTC Sep 19, 2012 at 5:37pm UTC TJF (11) This is the solution - the missing link: pthread_attr_setschedpolicy(&attr, SCHED_RR); before (!!!) the Pthread_create_detached struct mystruct info; info.website = website; info.file = file; info.type = type; info.timez = timez; for(threadid = 0; threadid < thread_c; threadid++) { // printf("Creating #%ld..\n", threadid); retcode = pthread_create(&threads[threadid], NULL,

Please sir, help me out. The time now is 03:59 PM. Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. Since most Threads will be blocked by recv or accept and ther will probably be only very few running concurrently it's reasonable to use many threads.

Cincerly Niklas angustiaJanuary 12th, 2007, 06:35 PM1.- try with pthread_detach at the end of mythread() 2.- look in /proc/sys/kernel/threads-max (max number of threads for the whole system) 3- with ps -eLf Check if they return errors. Before returning, a successful call to pthread_create() stores the ID of the new thread in the buffer pointed to by thread; this identifier is used to refer to the thread in The error code is stored in rc. ... } Exceptions: The following Pthreads functions do not return any error code: pthread_t pthread_self(void); // always succeeds.

[email protected] Astrophysics for senior students Cosmic engine for senior students Work experience for senior students Teacher workshops Teacher resources Tips on holding a viewing night External links [email protected] blog Parkes Observatory There were similar cases reported but no answers.... I still don't understand why it could only open 380 threads, even when not releasing the ressources this number seems to be prity small.

My mistake documented in the Austin Group Archive. [2] Errors: errno in UNIX programs.

Some of this is documented in the man help for pthread_attr_init. Are you new to LinuxQuestions.org? See: http://bugs.mysql.com/bug.php?id=27487 OS error code 12: Cannot allocate memory InnoDB: Error: pthread_create returned 12 070329 14:54:41 mysqld ended This behavior has been experienced on: RHEL3 (2.4.21-37.ELsmp) and SuSE 10.1 ( glibc-2.4-31 Linux 2016-12-12 PTHREAD_CREATE(3) Copyright and license for this manual page HTML rendering created 2016-12-12 by Michael Kerrisk, author of The Linux Programming Interface, maintainer of the Linux man-pages project.

ERRORS The pthread_create() function will fail if: [EAGAIN] The system lacked the necessary resources to create another thread, or the system-imposed limit on the total number of threads in a process Required fields are marked *Comment Notify me of followup comments via e-mail Name * Email * Website Please note: JavaScript is required to post comments. « Real-World Systems | Pthreads arguments Butenhof: Programming with POSIX Threads, chap 1.9.3, pp 31-34, Addison-Wesley, ISBN 0-201-63392-2. EINVAL Invalid settings in attr.

Also I wasnt able to find out what this error code of 12 means, I read the description of pthread_create (http://www.opengroup.org/onlinepubs/007908799/xsh/pthread_create.html) but I dont know how to relate the error value share|improve this answer answered Dec 31 '11 at 4:02 Paul Betts 56.5k1498172 I tried allocating it using malloc but it still returned 12; after applying correct changes for using c pthreads share|improve this question edited Dec 31 '11 at 4:18 Jonathan Leffler 453k62523839 asked Dec 31 '11 at 3:58 Saustin 432721 The argument to the thread routine getstuff() Code: struct Threadargs { int seq; }; void getCurrentDateTime(char *sdate) { time_t tnum; struct tm *tmdate; time(&tnum); tmdate = localtime(&tnum); strftime(sdate, 21, "%Y-%m-%d %H:%M:%S", tmdate); } unsigned int genRandom(int digit=5) {

int pthread_equal(pthread_t t1, pthread_t t2); void pthread_exit(void *value_ptr); // never returns. HoumanJanuary 13th, 2007, 05:34 PMhi there, After much googling I have found a solution to the problem and I think I know what the problem is, but before that, here is goodman888 View Public Profile View LQ Blog View Review Entries View HCL Entries Find More Posts by goodman888 04-14-2008, 05:20 AM #3 UlrichWinkler LQ Newbie Registered: Apr 2008 Posts: Up to a few exceptions given below, the Pthreads functions return an int with the following value: 0 if the call was successful.