On 18 Jan 2010, at 10:43 pm, [email protected] wrote:
i think a lot of the slowdown comes from that linux was not streamlined its userspace, but the userspace just got more and more complicated and does tons of redundant stuff... what they did then was not to fix userspace, but they optimized the kernel to cache anything... look at some typical syscall traces... tons of files are stat()ed... multiple times... it opens unix domain sockets to talk to a not existant ldap name service or something... tons of shared libraries are loaded... and that is all before even your main() entry is gets called... linuxemu doesnt shortcut these things... i cant reuse the shared library mmaps on exec ect... i think walks are not cached in plan9, so you have to talk to your fileserver. the syscall overhead is just one of the bottlenecks of linux emulation and you would have to put tons of more crap in the kernel to get mozilla or opera working... and even more to get it half as fast as in linux. just keep plan9 small and simple.
Indeed! I doubt I'd be interested in looking at a plan-9-turned-into- linux kernel ever! :)
You got me wondering how much could be cached in linuxemu. Would a cache server filesystem make sense?
-- http://xkcd.com/676/ Ethan Grammatikidis [email protected]
