Replacing C

[Kurt Roeckx]

On Sun, Jan 08, 2017 at 02:37:43PM -0800, Hal Murray wrote:
> 
> >> OTOH, if the OS is time stamping packets, and PPS, for the ntpd daemon
> >> then the daemon can tolerate 'some' jitter. 
> 
> > In normal operation we can expect lots of pairs of small allocations at UDP
> > datagram sizes with deallocation fairly rapidly thereafter. So the heap will
> > have lots of churn, which is bad... 
> 
> We don't care about the timing in most of the code.  The only critical 
> section is the chunk between grabbing the time and sending the packet.  That 
> chunk is likely to involve crypto.
> 
> We could fix that with another packet.  The idea is that you get a time stamp 
> from the kernel on the transmit side.  Then you have to send another packet 
> to get that time stamp to the other end.

Didn't the support for that get removed? Or am I confusing it with
something else?


Kurt