On Fri, Jan 25, 2002 at 09:19:14PM +0300, kuznet@xxxxxxxxxxxxx wrote:
> > I can't found ifstat, nstat in my iproute 010824 .. Maybe old one ?
> Yes, if appeared in the nest snapshot together with tcpdiag.
> > By the way I don't see how you get over wraparound problem.
> It needs sampling each sevral seconds to calculate rates,
> so that the problem just does not exist.
> > in read stat part ? Fast, simple (and possibly wrong) :)
> Yes. And this is exactly which I do not want to pay in addition
> to storing in the kernel information which it never wants to remember.
On the general topic of 64-bit counters, two facts weigh very heavily,
first, current and future hardware stores stats in 64-bit numbers, and
second, there are indeed MiBs which have 64-bit stats. We had the
specific info at the kernel summit meeting... I will see if I can dig it
If we do -not- have a way for NICs to dump 64-bit stats, each driver is
going to have scale stats down to 32 bits, and perhaps implement
in-driver sampling code.
Finally, IMHO the world is moving to machines that store 64-bit
numbers naturally and atomically. Don't some of the new IA32 CPUs
even have support for 64-bit integers?
So, I beg pardon for being lost in the thread and not having found the
perfect spot to reply, but there it is :)