Messages in this thread | | | Date | Thu, 24 Jun 1999 02:10:06 +0200 | From | Ralf Baechle <> | Subject | Re: Linux and Network Flight Recorder |
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On Tue, Jun 22, 1999 at 08:59:48PM -0600, yodaiken@chelm.cs.nmt.edu wrote:
> On Tue, Jun 22, 1999 at 11:04:38PM +0200, Henning P. Schmiedehausen wrote: > > it working and it captures every package on a saturated 100 (1000) > > MBit interface. > > > > mjr clearly stated what they need: zero-copy input BPF. It seems that > > some OS (namely *BSD) delivers this. > > Is it known that zero copy is the only way to deliver this? Last time > I looked at it, memory was much faster than networks.
Highspeed networks are often significantly faster than memory subsystems. Recently I've seen a GSN network card which interfaces with two memory subsystems on an Origin 2000 just because a single one doesn't deliver the bandwidth ... Copying? No way, in that league you can do everything with your data just not look touch it. A GSN successor is being discussed ...
Ralf
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