Someone wrote in ![[info]](http://l-stat.livejournal.com/img/userinfo.gif){kind=small} jeffr_tech, |
few points
The pipe benchmark is interesting. I don't know why Linux is so much slower, but I would be interested if somebody works it out (or: why FreeBSD is much faster :)). However, the pipe benchmark is a bit useless because it doesn't even touch the data before it is sent or after it is read... this makes the results basically meaningless as a performance indicator (still technically interesting if you are working on actual implementations). Don't go down false optimization path with this one.
Regarding superpages... you mean it allows the *userspace* to automatically use large TLBs? I would hope the kernel is already using them?
The pipe benchmark is interesting. I don't know why Linux is so much slower, but I would be interested if somebody works it out (or: why FreeBSD is much faster :)). However, the pipe benchmark is a bit useless because it doesn't even touch the data before it is sent or after it is read... this makes the results basically meaningless as a performance indicator (still technically interesting if you are working on actual implementations). Don't go down false optimization path with this one.
Regarding superpages... you mean it allows the *userspace* to automatically use large TLBs? I would hope the kernel is already using them?
