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libwebsockets/minimal-examples/http-server/minimal-http-server-smp
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Andy Green d9f982a055 minimal examples: update for CSP best practices 
1) update the logos to svg

2) add svg icon for strict security policy where used

3) define new vhost option flag to enforce sending CSP headers
   with the result code

4) add vhost option flag to minimal examples to
   enforce sending CSP where applicable

5) Go through all the affecting examples confirming they
   still work

6) add LWS_RECOMMENDED_MIN_HEADER_SPACE constant (currently
   2048) to clarify when we need a buffer to hold headers...
   with CSP the headers have become potentially a lot
   larger.
2018-11-21 17:03:29 +08:00
..
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 minimal examples: update for CSP best practices 2018-11-21 17:03:29 +08:00
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