65 lines
1.7 KiB
Text
65 lines
1.7 KiB
Text
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= raw
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This is a simple asynchronous demo, that demonstrates use of the RAW
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sockets with a server, along with async message handling, to obtain a
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very high level of asynchronous operation, suitable for use in a highly
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concurrent server application.
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== Compiling
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You can override the level of concurrency with the `PARALLEL` option.
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This determines how many requests the server will accept
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at a time, and keep outstanding. Note that for our toy
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implementation, we create this many "logical" flows of execution
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(these are _NOT_ threads), where a request is followed by a reply.
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The value of `PARALLEL` must be at least one, and may be as large
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as your memory will permit. (The default value is 32.)
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The best way to build is using cmake and Ninja build:
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[source, bash]
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----
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% mkdir build
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% cd build
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% cmake -G Ninja ..
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% ninja
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----
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You can also build the hard way. For example, on UNIX-style systems:
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[source, bash]
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----
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% export CPPFLAGS="-D PARALLEL=32 -I /usr/local/include"
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% export LDFLAGS="-L /usr/local/lib -lnng"
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% export CC="cc"
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% ${CC} ${CPPFLAGS} raw.c -o raw ${LDFLAGS}
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----
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== Running
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To run the server, use the arguments `__url__ -s`.
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To run the client, use the arguments `__url__ __msec__`.
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The _msec_ is a "delay" time that server will wait before responding.
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We have these delays so simulate long running work.
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In the following example, all of the clients should complete within
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2 seconds. (Assuming `PARALLEL` is defined to be large enough.)
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[source,bash]
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----
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% export URL="tcp://127.0.0.1:55995"
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# start the server
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% ./raw $URL -s &
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# start a bunch of clients
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# Note that these all run concurrently!
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% ./raw $URL 2 &
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% ./raw $URL 2 &
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% ./raw $URL 2 &
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% ./raw $URL 2 &
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% ./raw $URL 2 &
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----
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