Any "well-tuned" multi-threaded application requires unified memory for simultaneous access to managed memory from the CPU and GPUs as it is not possible with c

Any "well-tuned" multi-threaded application requires unified memory for simultaneous access to managed memory from the CPU and GPUs as it is not possible with compute capability lower than 6.0. This is because pre-Pascal GPUs lack hardware page faulting, so coherence can’t be guaranteed. On these GPUs, an access from the CPU while a kernel is running will cause a segmentation fault.