Thanks for the pointer - this is what I needed. (For dissecting the packet I'm going to use the code from udpsnoop.d in the DTrace Toolkit.)
On 15 February 2011 04:27, Rao Shoaib <rao.sho...@oracle.com> wrote: > Toby Riddell wrote: >> >> On Solaris 10, is there a probe that fires on receipt of an IP/UDP >> packet? I've spent some time looking for one but can't seem to find >> what I want. (It's unfortunate that its not running OpenSolaris as >> otherwise we'd use the ip provider.) >> >> What I'm trying to do is collect data on the latency between a packet >> being received and it making its way into a userlevel process. >> >> Thanks. >> _______________________________________________ >> dtrace-discuss mailing list >> dtrace-discuss@opensolaris.org >> > > It depends from where you would like to start measuring. From the NIC, MAC > layer or IP there are queues in each sub system. If the packet is an > externally generated packet you could trap it in ip at ip_udp_input() or in > udp at udp_input(). However it will be very difficult for you to filter the > packets because it will require knowledge of how the packet is constructed. > > Rao. > > _______________________________________________ dtrace-discuss mailing list dtrace-discuss@opensolaris.org
