On Sun, Sep 24, 2000 at 08:49:37AM +1100, [EMAIL PROTECTED] wrote:
> A user space solution involves waiting for a packet from the previous
> machine before sending your data to the corresponding open socket.
>
> This could be implemented in kernel space, eliminating some of the
> user space latency.
>
> There is, however, latency to send data to the card before the card
> starts to transmit. If we are aiming for about 20% improvement, the
> total latency round the whole set would have to be a good deal less
> than this for the exercise to be worthwhile.
>
> Ideally, the card could have its buffer loaded with data, and then
> have the transmit delayed till a packet from the previous computer had
> been received. The latency would be really low in this case. How
> compatible is the common interface to ethernet cards with this approach ?
>
> I'd imagine token rings implement this in hardware, seriously reducing
> the latency. But I'm looking for a way to add the functionality to
> current standard ethernet links.
Token Bus. Which is token ring implemented using normal ethernet.
Probably not as good as real token ring but comes close as only the machine
with the token is allowed to send. I think it's 802.5?
--
John
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