Akka-Http on the Raspberry Pi

This is a follow up test to test how well akka-http runs on a Raspberry Pi (2).

A similar test was done around 2 years ago with spray. See here for details:

• Blog post on the spray blog

• Code for old spray blog post

Follow these steps to get started:

1. Git-clone this repository.

    $ git clone git://github.com/matsluni/akka-http-rpi.git
   

2. Change directory into your clone:

    $ cd akka-http-rpi
   

3. Launch SBT:

    $ sbt
   

4. Compile everything and run all tests:

    > compile
   

5. Start the application:

    > run
   

6. Browse to http://localhost:8080/

7. Create an assembly and deploy to your Raspberry Pi

    > assembly
    
    > scp target/scala-2.11/akka-http-rpi-assembly-0.1.jar pi@raspberrypi:~/
   

8. Start akka-http on the Raspberry Pi

• RPI 1

    > ~/jdk1.8.0_66/bin/java -Xss1M -Xms64M -Dakka.actor.default-dispatcher.fork-join-executor.parallelism-max=2 -jar akka-http-rpi-assembly-0.1.jar
  

• RPI 2

    > ~/jdk1.8.0_66/bin/java -Xss2M -Xms128M -jar akka-http-rpi-assembly-0.1.jar
  

Benchmark with wrk

wrk -c 30 -t 20 -d20s http://raspberrypi:8080/

In my tests I could reach around 520 Req/sec with this setup, but this setup isn't in any way optimized. In further tests I want to investigate further and see some backpressure at work.