I agree with your basic point - a generic syscall batching mechanism would be a good thing - but it's worth noting that GPU workloads are usually much better su

I agree with your basic point - a generic syscall batching mechanism would be a good thing - but it's worth noting that GPU workloads are usually much better suited for ginormous "fire and forget" command/command+data sequences. syscalls tend to be more interactive/round-trip-dependent, where syscall N+1 is at least partially determined by a userspace process doing something fairly complicated with the result of syscall N. This is a natural enemy of massive batching.