----- On Jul 17, 2015, at 6:58 AM, Ondřej Bílka neleai@xxxxxxxxx wrote: [...] >> If we invoke this per-thread registration directly in the glibc NPTL >> implementation, >> in start_thread, do you think it would fit your requirements ? >> > A generic solution would be adding eager initialization of thread_local > variables which would fix more performance problems. Concretely, what code would be in charge of this initialization ? What changes does "eager initialization" imply from the current implementation ? > Second would be write patch to libc adding function > pthread_create_add_hook_np to register function that would be ran after > each thread creation. Do you suggest that this callback should be registered once per thread, or somehow attached to pthread_attr_t ? As maintainer of lttng-ust, where we need some control over our own threads, but where we want minimal impact on the overall application, I would really prefer if we can attach the callback to pthread_attr_t. Thanks, Mathieu -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
