Re: overflows in /proc/net/dev

[Mario 'BitKoenig' Holbe]

Chris Wedgwood <cw@xxxxxxxx> wrote:
> On Thu, Aug 18, 2005 at 09:28:10AM +0200, Sebastian Cla?en wrote:
>> in struct net_device_stats all members are defined as unsgined
>> long. In time of gigabit ethernet this takes not long to overflow.
> It should still take an appreciable amount of time surely?  We can

With 100MBit it took about 5 minutes to overflow the 32bit byte counters
(too less for typical mrtg and Nyquist-Shannon sampling theorem in
mind), with 1GBit it takes about 30 seconds.
If you consider this appreciable... well :)

> detect those wraps in userspace and deal with it as needed.

Of course, it's usually enough time for a typical userspace application
to get scheduled at least twice.


regards
   Mario
-- 
User sind wie ideale Gase - sie verteilen sich gleichmaessig ueber alle Platten

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