On Sat, Jan 4, 2025 at 1:03 PM Bakul Shah via 9fans <9fans@9fans.net> wrote: > > On Jan 4, 2025, at 9:35 AM, Stuart Morrow <morrow.stu...@gmail.com> wrote: > >> This has been a very interesting discussion, thanks all. My offer > >> remains: if anyone wants to revive NIX, I am happy to help. > > > > Am I the only one who sees that the Fastcall stuff would be good for > > bringing some devices out of the kernel (that are devs only for > > performance reasons)? > > > > And then, closer to what Fastcall was actually for (fossil and > > venti>disk), you also have ??fs>nusb/disk>disk, which could always do > > with a speedup. > > I've been meaning to ask... What is the typical *overhead* of a 9p > call to a user level driver compared to a kernel based driver?
>From what I know the only performance issue for 'user-space <-> kernel-space' 9P are context switches. IP is in-kernel to eliminate context switches for ether(3) <-> ip(3). ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/T7692a612f26c8ec5-M63b69bcecc79d154ac18e796 Delivery options: https://9fans.topicbox.com/groups/9fans/subscription
