Home > pthread setaffinity np error > pthread_setaffinity_np error

Pthread_setaffinity_np Error

size_t cpusetsize, const cpu_set_t *cpuset);int pthread_getaffinity_np(pthread_t thread, size_t cpusetsize, cpu_set_t *cpuset); Compile and link with -pthread. Description The pthread_setaffinity_np() function sets the CPU affinity mask of the thread

Pthread_setaffinity_np Vs Sched_setaffinity

thread to the CPU set pointed to by cpuset. If cpu_set_t the call is successful, and the thread is not currently running on one of the CPUs pthread_setaffinity example in cpuset, then it is migrated to one of those CPUs. The pthread_getaffinity_np() function returns the CPU affinity mask of the thread thread in the

Cpu_zero

buffer pointed to by cpuset. For more details on CPU affinity masks, see sched_setaffinity(2). For a description of a set of macros that can be used to manipulate and inspect CPU sets, see cpu_set(3). The argument cpusetsize is the length (in bytes) of the buffer pointed to by cpuset. Typically, this argument

Pthread_attr_setaffinity_np Example

would be specified as sizeof(cpu_set_t). (It may be some other value, if using the macros described in cpu_set(3) for dynamically allocating a CPU set.) Return Value On success, these functions return 0; on error, they return a nonzero error number. Errors EFAULT A supplied memory address was invalid. EINVAL (pthread_setaffinity_np()) The affinity bit mask mask contains no processors that are currently physically on the system and permitted to the thread according to any restrictions that may be imposed by the "cpuset" mechanism described in cpuset(7). EINVAL (pthread_setaffinity_np()) cpuset specified a CPU that was outside the set supported by the kernel. (The kernel configuration option CONFIG_NR_CPUS defines the range of the set supported by the kernel data type used to represent CPU sets.) EINVAL (pthread_getaffinity_np()) cpusetsize is smaller than the size of the affinity mask used by the kernel. ESRCH No thread with the ID thread could be found. Versions These functions are provided b

here for a quick overview of the site Help Center Detailed answers to any questions you might have pthread_setaffinity_np android Meta Discuss the workings and policies of this site About Us

Cpu_set Example

Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads sched_setaffinity example 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, https://linux.die.net/man/3/pthread_setaffinity_np just like you, helping each other. Join them; it only takes a minute: Sign up pthreads_setaffinity_np: Invalid argument? up vote 1 down vote favorite I've managed to get my pthreads program sort of working. Basically I am trying to manually set the affinity of 4 threads such that thread 1 runs on CPU 1, thread 2 http://stackoverflow.com/questions/2564956/pthreads-setaffinity-np-invalid-argument runs on CPU 2, thread 3 runs on CPU 3, and thread 4 runs on CPU 4. After compiling, my code works for a few threads but not others (seems like thread 1 never works) but running the same compiled program a couple of different times gives me different results. For example: hao@Gorax:~/Desktop$ ./a.out Thread 3 is running on CPU 3 pthread_setaffinity_np: Invalid argument Thread Thread 2 is running on CPU 2 hao@Gorax:~/Desktop$ ./a.out Thread 2 is running on CPU 2 pthread_setaffinity_np: Invalid argument pthread_setaffinity_np: Invalid argument Thread 3 is running on CPU 3 Thread 3 is running on CPU 3 hao@Gorax:~/Desktop$ ./a.out Thread 2 is running on CPU 2 pthread_setaffinity_np: Invalid argument Thread 4 is running on CPU 4 Thread 4 is running on CPU 4 hao@Gorax:~/Desktop$ ./a.out pthread_setaffinity_np: Invalid argument My question is "Why does this happen? Also, why does the message sometimes print twice?" Here is the code: #define _GNU_SOURCE #include #include #include #include #include #define handle_error_en(en

Bug #519 fix pthread_setaffinity_np error https://charm.cs.illinois.edu/redmine/issues/519 handling Added by Jim Phillips over 2 years ago. Updated over 2 years ago. Status:ClosedStart date:06/13/2014Priority:HighDue date:Assignee:Phil Miller% Done:0%Category:machine layersEstimated time:1.00 hourTarget version:6.6.0Spent time:- Description Since bug 501 is delayed to 6.0.1 I've broken out this fix to pthread_setaffinity_np() error pthread_setaffinity_np error handling. The old code assumed that pthread_setaffinity_np() set errno and returned 0 or -1 like setaffinity, but it actually returns the full error code. This patch (emailed to core) sets errno to the return value of pthread_setaffinity_np() so that perror() works. pthread_setaffinity_np vs sched_setaffinity thread_affinity_errno.patch (1.46 KB) Jim Phillips, 06/13/2014 10:45 am History #1 Updated by Phil Miller over 2 years ago Assignee set to Phil Miller Patch looks good, applying. Thanks #2 Updated by Phil Miller over 2 years ago Status changed from New to Implemented Jim: for future issues for which you have a patch prepared, feel free to submit them directly to Gerrit. We're not going to be strict about an open issue for every change to the codebase. #3 Updated by Phil Miller over 2 years ago Status changed from Implemented to Merged #4 Updated by Phil Miller over 2 years ago Status changed from Merged to Closed Also available in: Atom PDF Loading... Powered by Redmine © 2006-2013 Jean-Philippe Lang

 

Related content

pthread_setaffinity_np error 22

Pthread setaffinity np Error p here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and pthread setaffinity np vs sched setaffinity policies of this site About Us Learn more about Stack Overflow the pthread setaffinity np example company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Cpu set t Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of million programmers just like you helping each other Join them it only