On Fri, Nov 27, 2020 at 02:32:37PM -0500, Gabriel Krisman Bertazi wrote: > This is the patch I'm using to evaluate the impact syscall user dispatch > has on native syscall (syscalls not redirected to userspace) when > enabled for the process and submiting syscalls though the unblocked > dispatch selector. It works by running a step to define a baseline of > the cost of executing sysinfo, then enabling SUD, and rerunning that > step. > > On my test machine, an AMD Ryzen 5 1500X, I have the following results > with the latest version of syscall user dispatch patches. > > root@olga:~# syscall_user_dispatch/sud_benchmark > Calibrating test set to last ~5 seconds... > test iterations = 37500000 > Avg syscall time 134ns. > Caught sys_ff00 > trapped_call_count 1, native_call_count 0. > Avg syscall time 147ns. > Interception overhead: 9.7% (+13ns). > > Signed-off-by: Gabriel Krisman Bertazi <kris...@collabora.com>
Reviewed-by: Kees Cook <keesc...@chromium.org> -- Kees Cook
