Re: Intel P6 vs P7 system call performance

Alan Cox
2002-12-17T18:39:52Z

On Tue, 2002-12-17 at 18:30, Ulrich Drepper wrote:
> demultiplexing happens in the kernel. Do we want to do this at
> userlevel? This would allow almost no-cost determination of those
> syscalls which can be handled at userlevel (getpid, getppid, ...).

getppid changes and so I think has to go to kernel (unless we go around
patching user pages on process exit [ick]). getpid can already be done
by reading it once at startup time and caching the data.