Ok, time to go into another separate thread ;->

Sounds like a good idea.

if (skbneedstimestamp)
	do_gettimeofday(&skb->stamp);
else
	defertimestamp()

For defertimestamp() would it be feasible that you store only the
jiffies value in the skb then get timeofday later and somehow
compensate for the difference? Seems very doable to me.

Question is when do you decide skbneedstimestamp?
Is it when the device is in promiscous mode or do it in ip or icmp etc?

cheers,
jamal


On Tue, 10 Jun 2003, David S. Miller wrote:

   From: Ben Greear [off-list ref]

   Yes, I understand why we want a time-stamp very early...but if
   we can get _some_ sort of time stamp very cheap (TSC, for example)
   then we can potentially defer the more expensive conversion of
   this stamp into the equivalent of whatever do_gettimeofday will
   give us.

I fully understand your idea, I've talked about it with Alexey many
times.  Someone just has to implement it.

pkt_sched.h is probably the place to play, maybe make an
asm/pkt_sched.h header.