Is it possible to write a dtrace script which can tell me the number of mblks,
and total chain length, upon entry to a function (gldv3 nic driver's xmit
function). I naively tried to iterate over mp->b_cont, but there is no while
or for in dtrace..
Eg, what I want to do is:
for (pkt_size=0, count=0,bp = mp; bp != NULL; bp = bp->b_cont) {
pkt_size += (int)(bp->b_wptr - bp->b_rptr);
count++;
}
(if it makes any difference I'm using a mix of snv_b86 and snv_b90)
Thanks,
Drew
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