[erlang-questions] Matching IP address in socket module

[Micael Karlberg]

Hi,

Its early days still, but the goal is definitely that it should
be faster.

Here is some figures from a (time) test tool which is part of the
test suite (its basically a ping-pong case), both server and client
running on the same host (but in different VMs):

Two transports:
         gen:  gen_tcp
         sock: socket (tcp)

The socket active mode is a simulation of gen_tcp active mode
(no active = N).

The tables are the exchange from the client side.

With server side using gen (active = false):

         Transport       Active          Data
         gen             false           10192 byte/ms, 154 msgs/ms
         gen             true            10383 byte/ms, 157 msgs/ms
         gen             once            6003 byte/ms,  90  msgs/ms
         sock            false           14050 byte/ms, 212 msgs/ms
         sock            true            14772 byte/ms, 223 msgs/ms
         sock            once            14050 byte/ms, 210 msgs/ms


With server side using gen (active = true):

         Transport       Active          Data
         gen             false           9447 byte/ms,  143 msgs/ms
         gen             true            22345 byte/ms, 338 msgs/ms
         gen             once            5532 byte/ms,  83  msgs/ms
         sock            false           15316 byte/ms, 232 msgs/ms
         sock            true            23693 byte/ms, 358 msgs/ms
         sock            once            22068 byte/ms, 334 msgs/ms


With server side using sock (active = false, async = true):

         Transport       Active          Data
         gen             false           11260 byte/ms, 170 msgs/ms
         gen             true            22273 byte/ms, 337 msgs/ms
         gen             once            7703 byte/ms,  116 msgs/ms
         sock            false           15211 byte/ms, 230 msgs/ms
         sock            true            24778 byte/ms, 375 msgs/ms
         sock            once            23086 byte/ms, 349 msgs/ms


With server side using sock (active = true, async = true):

         Transport       Active          Data
         gen             false           11351 byte/ms, 171 msgs/ms
         gen             true            22469 byte/ms, 340 msgs/ms
         gen             once            7407 byte/ms,  112 msgs/ms
         sock            false           15484 byte/ms, 234 msgs/ms
         sock            true            24885 byte/ms, 377 msgs/ms
         sock            once            23570 byte/ms, 357 msgs/ms


There is of course a bit of overhead since the socket transport
is trying to emulate (part of) gen_tcp.

This is run on a Dell Precision T1700 running SLES 12 SP2 (not that
that effects the relative performance).
Run with a snapshot from the maint branch.

This is obviously not a real use case, but it can be a guideline.
Also no UDP test (at the moment).

/BMK

On 2019-10-24 18:48, Frank Muller wrote:
> Hi Thomas
> 
> Is the socket module faster than gen_tcp/gen_udp in your case? If yes, can you please share some 
> numbers.
> 
> /Frank
> 
>      > case socket:recvfrom(Sock, 0, nowait) of
>      >       {ok, {#{family := Domain,
>      >               port   := Port,
>      >               addr   := Addr}, Data}} ->
>      >       .
> 
>     Hi Micael, Mark,
> 
>     thanks for your replies. The snippet above helped me getting the record
>     matched.
> 
>     I'm quite impressed with the socket module, it seems to be pretty
>     complete, at least for my application.
> 
>     Thanks,
>     Thomas
>