Add initial test-case-4

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

AT10085_report.md

@@ -125,28 +125,33 @@ careful when using a headset because the volume can be quite loud).
 
 # Test case 1: Switching audio streams onto running devices
 
-![Test case 1](audio-test-1.png){width=50% }
+![Test case 1](audio-test-1.png){width=50%}
 
 FIXME
 
 # Test case 2: Audio input reconfiguration
 
-![Test case 2](audio-test-2.png){width=50% }
+![Test case 2](audio-test-2.png){width=50%}
 
 FIXME
 
 # Test case 3: Capturing multiple inputs to multiple outputs
 
-![Test case 3](audio-test-3.png){width=50% }
+![Test case 3](audio-test-3.png){width=50%}
 
 FIXME
 
 # Test case 4: Benchmarking load caused by a bigger number of clients
 
-![Test case 4](audio-test-4.png){width=50% }
+![Test case 4](audio-test-4.png){width=50%}
 
 FIXME
 
+```
+$ apt install sndfile-tools
+$ scripts/run-test-case-4.sh
+```
+
 # Test case 5: xrun behaviour under load
 
 FIXME

scripts/pw-jack-sndfile-jackplay.sh

+#!/bin/bash
+
+MY_WAV=/usr/share/sounds/alsa/Front_Center.wav
+
+pw-jack sndfile-jackplay ${MY_WAV} > /dev/null 2>&1
+

scripts/run-test-case-4-base.sh

+#!/bin/bash
+
+N=$1
+
+MY_WAV=/usr/share/sounds/alsa/Front_Center.wav
+
+for i in $( seq 1 $N )
+do
+   #echo "  running $i sndfile-jackplay"
+   pw-jack sndfile-jackplay ${MY_WAV} -l 0 > /dev/null 2>&1 &
+done
+
+# Wait before checking if all sndfile-jackplay are running
+sleep 4
+N_running=$(pidof sndfile-jackplay | wc -w)
+
+if [ $N -ne $N_running ]
+then
+   echo "Some sndfile-jackplay are missing"
+   killall sndfile-jackplay
+   exit 1
+fi
+
+
+/usr/bin/time -f "%e" ./pw-jack-sndfile-jackplay.sh
+
+/usr/bin/time -f "%e" ./pw-jack-sndfile-jackplay.sh
+
+# TODO wait end of previous call to sndfile-jackplay before killing all of them
+killall sndfile-jackplay
+
+

scripts/run-test-case-4.sh

+#!/bin/bash
+
+for i in $(seq 1 10 100)
+do
+    echo "Run with $i sndfile-jackplay"
+   ./run-test-case-4-base.sh $i
+   sleep 2
+done