Re: Netchannels: progress report. Sending benchmark.

[Evgeniy Polyakov <johnpol@2ka.mipt.ru>]

On Mon, Jul 10, 2006 at 05:23:21PM +0400, Evgeniy Polyakov (johnpol@2ka.mipt.ru) wrote:
> After week vacations I'm pleased to announce following progress report.
> 
> Numbers for small packets (80 bytes) bulk sending:
> 
>  * netchannel: 57 MB/sec, ~80% CPU usage
>  * socket: 22 MB/sec, ~90% CPU usage
> 
> Receiving side is netcat server, which dumps received data into
> /dev/null
> 
> Actually it is not 100% correct to call that results correct, since 
> it uses hackish optimisations, which can lead to broken behaviour for 
> non-bulk transfers or transfers over bad lines. If some of them are
> removed, speed drops to 54 MB/sec for 80 bytes packets, and if socket
> analog for NODELAY flag is set, i.e. each packet is immediately being
> sent when it has been written, speed drops down to 16 MB/sec (socket
> with SO_NODELAY was not tested though).

I mean TCP_NODELAY.
Socket code uses nonblocking mode and epoll.

-- 
	Evgeniy Polyakov