Re: ps performance sucks (was Re: dcache_rcu [performance results])

From: Alexander Viro (viro@math.psu.edu)
Date: Tue Nov 05 2002 - 00:59:45 EST


On Mon, 4 Nov 2002, Martin J. Bligh wrote:

> > I do dislike /dev/ps mightily.
>
> Well it can't be any worse than the current crap. At least it'd
> stand a chance in hell of scaling a little bit. So I took a very
> quick look ... what syscalls are you reduced to per pid, one ioctl
> and one read?

Oh, yes it can. Easily.
        * device is not network-transparent - even in principle
        * restricting data access would be harder - welcome to suid or
sgid country
        * real killer: you think Albert would fail to produce equally
crappy code and equally crappy behaviour? Yeah, right.

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