add script for running readtest

[ardour.git] / tools / run-readtest.sh

diff --git a/tools/run-readtest.sh b/tools/run-readtest.sh
new file mode 100755 (executable)
index 0000000..952804c
--- /dev/null
+++ b/tools/run-readtest.sh
@@ -0,0 +1,80 @@
+#!/bin/sh
+
+dir=/tmp
+filesize=100 # megabytes
+numfiles=128
+nocache=
+interleave=
+blocksize=262144
+needfiles=1
+
+
+while [ $# -gt 1 ] ; do
+    case $1 in
+       -d) dir=$2; shift; shift ;;
+       -f) filesize=$2; shift; shift ;;
+       -n) numfiles=$2; shift; shift ;;
+       -N) nocache="-s"; shift; shift ;;
+       -b) blocksize=$2; shift; shift ;;
+    esac
+done
+
+if [ -d $dir -a -f $dir/testfile_1 ] ; then
+    # dir exists and has a testfile within it - reuse to avoid
+    # recreating files
+    echo "Re-using files in $dir"
+    needfiles=
+else
+    dir=$dir/readtest_$$
+    mkdir $dir
+    
+    if [ $? != 0 ] ; then
+       echo "Cannot create testfile directory $dir"
+       exit 1
+    fi
+fi
+
+if [ x$needfiles != x ] ; then
+    if [ x$interleave = x ] ; then
+       
+       #
+       # Create all files sequentially
+       #
+       
+       for i in `seq 1 $numfiles` ; do
+           dd of=$dir/testfile_$i if=/dev/zero bs=1M count=$filesize
+           echo $i
+       done
+    else
+       
+       #
+       # Create files interleaved, adding $blocksize to each
+       # file in turn.
+       #
+       
+       size=0
+       limit=`expr $filesize * 1048576`
+       while [ $size -lt $limit ] ; do
+           for i in `seq 1 $numfiles` ; do
+               dd if=/dev/zero bs=$blocksize count=1 >> $dir/testfile_$i
+           done
+           size=`expr $size + $blocksize`
+           echo "Files now @ $size bytes"
+       done
+    fi
+fi
+
+if uname -a | grep -s arwin ; then
+    # clears cache on OS X
+    sudo purge
+elif [ -f /proc/sys/vm/drop_cache ] ; then
+     # Linux cache clearing
+    echo 3 | sudo tee /proc/sys/vm/drop/cache >/dev/null
+else       
+    # need an alternative for other operating systems
+    :
+fi
+
+echo "Ready to run ..."
+
+./readtest $nocache -b $blocksize -q $dir/testfile_%d