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I intend to change the interfaces taking a cpuset_t parameter. Currently we have extern int pthread_attr_setaffinity_np (pthread_attr_t *__attr, __const cpu_set_t *__cpuset); extern int pthread_attr_getaffinity_np (__const pthread_attr_t *__attr, cpu_set_t *__cpuset); and the sched_[sg]etaffinity interfaces which have no prototype yet. The problem is the limited cpuset_t size. Just thinking about HT multicore processors in multi-processor machines should be enough that 1024 virtual processors isn't that hard to reach. Therefore the interface should include a size parameter: extern int pthread_attr_setaffinity_np (pthread_attr_t *__attr, __const cpu_set_t *__cpuset, size_t size); extern int pthread_attr_getaffinity_np (__const pthread_attr_t *__attr, cpu_set_t *__cpuset, size_t size); This way the data structure can be expanded if necessary. The interfaces are in very little use today. We keep the old interfaces and make them simple wrappers with a fixed size of 128 bytes. Unless I hear well-founded objections I'll make the change tomorrow. -- â Ulrich Drepper â Red Hat, Inc. â 444 Castro St â Mountain View, CA â
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