[popee]

> To reduce the performance impact of syscalls without modifying application software, exceptionless/asynchronous syscalls have been demonstrated. With the regular syscall interface, the userspace process requests a syscall by executing a special software interrupt instruction to cause a context switch to the kernel. The arguments for the syscall are put in the general-purpose registers. The exceptionless syscall model requires small modifications to the libc and the kernel: when a syscall is requested from the application program, the libc places the syscall’s arguments in a special page of memory (“syscall page”) and switches to another user-level thread.

It would be great to have standard API for this, let's say fake mux syscall that would queue other syscalls and trigger them all at once after some period of time.

[vmorgulis]

They try to do that in IncludeOS.