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libwebsockets/minimal-examples/http-server/minimal-http-server-smp
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Andy Green f7149e90c2 cc0: align dedication to CC0 FAQ recommended format 
https://libwebsockets.org/pipermail/libwebsockets/2019-April/007937.html

thanks to Bruce Perens for noting it.

This doesn't change the intention or status of the CC0 files, they were
pure CC0 before (ie, public domain) and they are pure CC0 now.  It just
gets rid of the (C) part at the top of the dedication which may be read
to be a bit contradictory since the purpose is to make it public domain.
2019-05-02 09:29:01 +01:00
..
mount-origin minimal examples: update for CSP best practices 2018-11-21 17:03:29 +08:00
CMakeLists.txt refactor: most preparation for -DLWS_ROLE_H1=0 2018-04-27 19:16:50 +08:00
localhost-100y.cert travis: h2spec integration 2018-04-26 15:27:02 +08:00
localhost-100y.key travis: h2spec integration 2018-04-26 15:27:02 +08:00
minimal-http-server-smp.c cc0: align dedication to CC0 FAQ recommended format 2019-05-02 09:29:01 +01:00
README.md docs: adjust lost image links 2018-09-19 10:22:21 +08:00

README.md

lws minimal http server with multithreaded service

Lws supports multithreaded service... build lws with -DLWS_MAP_SMP=<max number of threads>, the default is 1. If nonzero, some extra pthreads locking is built into lws and it supports multiple independent service threads.

lws-smp-overview

When an incoming connection is accepted, it is bound to the pt with the lowest current wsi count, to keep the load on the threads balanced. Only the pt the wsi is bound to can service the thread, so although there can be as many wsi being serviced simultaneously as there are service threads, a wsi can only be service by the pt it is bound to.

The effectiveness of the scalability depends on the load. Here is an example of roughly what can be expected

lws-smp-example

build

 $ cmake . && make

usage

 $ ./lws-minimal-http-server-smp
[2018/03/07 17:44:20:2409] USER: LWS minimal http server SMP | visit http://localhost:7681
[2018/03/07 17:44:20:2410] NOTICE: Creating Vhost 'default' port 7681, 1 protocols, IPv6 on
[2018/03/07 17:44:20:2411] NOTICE:   Service threads: 10

Visit http://localhost:7681 and use ab or other testing tools