[OpenAFS-devel] .35 sec rx delay bug?

[Jean-Marc Saffroy]

On Thu, 9 Nov 2006, Ken Hornstein wrote:

>> I think it should be possible to achieve the same result with sendfile()
>> and TCP_CORK. This may be for Linux only however.
>
> Yay, more #ifdef's!

That's not my problem, I'm just suggesting ideas. ;-)

> Hm, I am wondering if that's a win; that means two extra syscalls.

Here two extra syscalls (a few microseconds nowadays?) can save processing 
a packet (or more), and incurring network latency (a hundred microseconds 
on my Ether).

> We could play some games if you're sending a large chunk of data, 
> though ... you would only need to set TCP_CORK at the beginning of 
> sending a large chunk, and clear it at the end.  Clearly plenty of 
> things to play with.

This is exactly how it's meant to be used.


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