Hi. I'm developing a multi-threaded application where each thread uses a separate queue pair for communication with remote hosts. The queue pairs share only an ibv_context and a protection domain. When I run one application instance with 10 threads, each thread gets very bad performance. However, when I run 10 instances with 1 thread each, each instance gets good performance. I suspect that this is because of lock contention in the 1-instance-10-thread case for bf_lock and uar_lock (mlx4.h), because the threads share an ibv_context. If this is correct, will using a different ibv_context for each thread eliminate all lock contention? Is it safe to create several ibv_contexts in an application? Thanks for your help. Anuj Kalia. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
