Subject: Re: Interface traffic timestamps
To: Martin Husemann <martin@duskware.de>
From: Nathan J. Williams <nathanw@wasabisystems.com>
List: tech-kern
Date: 06/11/2004 18:55:45
Martin Husemann <martin@duskware.de> writes:
> On Fri, Jun 11, 2004 at 11:35:07AM -0700, Jason Thorpe wrote:
>> Yah, perhaps seconds is good enough ... then you pretty much definitely
>> do not have to worry about spl frobbing for a decent "ballpark"
>> timestamp.
>
> Yes - seconds is good enough and I would just not do any locking - but
> overall this all sounds hackish and I'm open to suggestions for better
> ways.
It sounds like what you want is something that could say "there
{was,was not}" a packet in the last N seconds, which the timeout
mechanism could check when it fires, and then clear. Writing a single
flag value repeatedly into a word will be much cheaper (and
cache-friendly) than using the actual time value.
- Nathan