Pthreads Error 11
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Pthread Error Handling
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Pthread Error Codes To String
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Error Return Code From Pthread_create Is 11 Error Detail Resource Temporarily Unavailable
favorite I'm running the following program. It simply creates threads that die straight away. What I have found is that after 93 to 98 (it varies slightly) successful calls, every next call to pthread_create() fails with error 11: Resource temporarily unavailable. I think I'm closing the thread correctly so it should give up on any resources it has but some resources become unavailable. The first parameter of the how to find pthread_threads_max ubuntu program allows me to set the interval between calls to pthread_create() but testing with different values, I've learned that the interval does not matter (well, I'll get the error earlier): the number of successful calls will be the same. The second parameter of the program allows me to set a sleep interval after a failed call but the length of the interval does not seem to make any difference. Which ceiling am I hitting here? EDIT: found the error in doSomething(): change lock to unlock and the program runs fine. The question remains: what resource is depleted with the error uncorrected? #include
I agree with asking the next question in the threading group.] >i have a code that uses pthread, but when i use pthread_create() >method pthread_create return it returns error code 11. That would depend on what error 11 is. pthread_create resource temporarily unavailable On my system, errno.h says: #define EDEADLK 11 /* Resource deadlock avoided */ /* 11 was EAGAIN */ So, pthread_attr_setstacksize 11 once was EAGAIN, which is a known return for pthread_create(). It may still be on your implementation. My system's man page says: The pthread_create() function will fail if: [EAGAIN] The system lacked http://stackoverflow.com/questions/12843890/98th-call-to-pthread-create-fails the necessary resources to create another thread, or the system-imposed limit on the total number of threads in a process [PTHREAD_THREADS_MAX] would be exceeded. >I have found out that this is often >because of exceeding the THREAD_MAX limit for the process. But i want >to use only about 24 threads at a given time, and i destroy the >threads (or atleast i thought so) can someone http://www.thecodingforums.com/threads/re-pthread_create-returns-error-code-11.685758/ tell me what i am doing >wrong here it would be of great help! thanks! My next guess is that your system won't allow a user process to run 24 (additional) threads. But most of what I can say about pthreads is guesses. The experts in comp.programming.threads know this stuff inside and out. -- Drew Lawson Some men's dreams for others turn to nightmares. I never would have thought this in my wildest dreams. Drew Lawson, May 27, 2009 #1 Advertisements Antoninus Twink Guest On 27 May 2009 at 16:51, Drew Lawson wrote: > Harshith <> writes: >>i have a code that uses pthread, but when i use pthread_create() >>method it returns error code 11. > > That would depend on what error 11 is. On my system, errno.h says: > #define EDEADLK 11 /* Resource deadlock avoided */ > /* 11 was EAGAIN */ > > So, 11 once was EAGAIN, which is a known return for pthread_create(). > It may still be on your implementation. It seems likely that it is, given the code that produced it. Of course, he can find out for sure by passing the return value from
Getting Started Download and install SDK Downloads Windows Linux and Mac OS X Installation instructions Windows: Installing using an NSIS installer Windows, OSX https://kripken.github.io/emscripten-site/docs/porting/pthreads.html and Linux: Installing the Portable SDK Platform-specific notes Verifying the installation Updating the SDK Uninstalling the Emscripten SDK Archived releases Emscripten Tutorial First things first Verifying Emscripten Running http://www.scsc.no/blog/2007/11-15-thread-creation-using-pthreadcreate-on-leopard.html Emscripten Generating HTML Using files Optimizing code Emscripten Test Suite and Benchmarks General tips and next steps Emscripten Test Suite Running the whole test suite Running specific how to tests Running a bunch of random tests Core test modes Non-core test modes Benchmark tests Common tests Debugging test failures Getting started using Emscripten from Visual Studio Integrating Emscripten and Visual Studio How to build a Visual Studio solution using Emscripten How to launch a project in a web browser from Visual Studio Specifying how to find project compiler settings Porting an existing solution file to use Emscripten Creating a new Visual Studio solution for Emscripten Bug Reporting Fastcomp LLVM-Backend and Clang bugs Site and documentation bugs FAQ How do I compile code? Why do I get multiple errors building basic code and the tests? I tried something: why doesn’t it work? Do I need to change my build system to use Emscripten? Why is code compilation slow? Why does my code run slowly? Why is my compiled code big? Why does compiling code that works on another machine gives me errors? How can I reduce startup time? Why does my code fail to compile with an error message about inline assembly (or {"text":"asm"})? Why does my HTML app hang? How do I run an event loop? Why doesn't my SDL app work? How do I link against system libraries like SDL, boost, etc.? What are my options for audio playback? How can my compiled program access files? Wh
turns out that they are no longer able to create new threads, despite having plenty of free memory and only a handful of other threads running. The culprit is a change in behaviour when calling pthread_create on Tiger vs. calling it on Leopard. On Tiger, it is possible to create millions of threads without worrying about cleaning up after them. This has changed in Leopard: Now, it is only possible to create 11002 (I wonder were that magical constant came from) threads before additional new threads can not be created. The following snippet of code demonstrates the issue: // A thread that just exits void* mythread(void *arg) { return 0; } int main (int argc, char *argv[]) { int err, count; pthread_t thread; while (1) { err = pthread_create(&thread, 0, mythread, 0); if (err != 0) { printf("Count: %d Error: %d '%s'\n", count, err, strerror(err)); sleep(5); } count++; if (count % 1000 == 0) printf("Count: %d\n", count); } return 0; } To compile the code, put it in a file called pthread-test.c and compile it by running gcc -Wall -o pthread-test pthread-test.c from a terminal. Then run the binary by typing ./pthread-test . After a few seconds, the program will give the following output: [ fourlights ] ./pthread-test ... Count: 10000 Count: 11000 Count: 11002 Error: 35 'Resource temporarily unavailable' The fix to this particular problem is to always explicitly detach threads that you do not intend to pthread_join() with later on. That is, once the thread has been created, it should be detached as follows: err = pthread_create(&thread, 0, mythread, 0); if (err != 0) { printf("Count: %d Error: %d '%s'\n", count, err, strerror(err)); sleep(5); } pthread_detach(thread); With this fix, the example no longer fails after the aforementioned 11002 threads. Comments Please enable JavaScript to view the comments by Disqus.
Comments by Disqus Previous: Spaces.. Spaces.. Spaces.. Next: Spaces.. Spaces.. Spaces.. and 10.5.1 About me My name is Daniel Stødle. I live in Tromsø, Norway, at 69.66° North. By day, I work as a researcher at the Northern Research Institute in Norway; by night, I run my company SCSC. I do most of my development on and for Mac OS X. My research is geared towards interacti