Date: Fri, 18 Jun 2004 13:25:51 -0400 From: Ed Maste <emaste@sandvine.com> To: freebsd-hackers@freebsd.org Subject: RE: memory mapped packet capturing - bpf replacement ? Message-ID: <FE045D4D9F7AED4CBFF1B3B813C8533701BD40E1@mail.sandvine.com>
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Matthew Dillon wrote: > > There's no reason why the time has to be in microseconds or > even that it must be adjusted to realtime. You also do not > have to support low power modes during testing which means > that just time-stamping the packets with the TSC plus a simple > base offset to correct for variences between cpus and machines > on the network ought to be sufficient. Fair enough. In my case I didn't need the timestamp anyway so just disabling it was the least-effort way to remove the overhead. I pointed out the timestamp issue only because it will penalize BPF against a new method (that doesn't have them) more than one might expect. -ed
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