new test tools to check thread-pool based disk i/o

1 files changed, 89 insertions, 0 deletions

diff --git a/tools/run-threadreadtest.sh b/tools/run-threadreadtest.sh
new file mode 100755
index 0000000000..76e177a659
--- /dev/null
+++ b/tools/run-threadreadtest.sh
@@ -0,0 +1,89 @@
+#!/bin/sh
+
+dir=/tmp
+filesize=100 # megabytes
+numfiles=128
+nocache=
+interleave=
+needfiles=1
+write_blocksize=262144
+args=
+
+if uname -a | grep --silent arwin ; then
+    ddmega=m
+else
+    ddmega=M
+fi
+
+while [ $# -gt 1 ] ; do
+    case $1 in
+	-d) dir=$2; shift; shift ;;
+	-f) filesize=$2; shift; shift ;;
+	-n) numfiles=$2; shift; shift ;;
+	-M) args="$args -M"; shift ;;
+	-D) args="$args -D"; shift ;;
+	-R) args="$args -R"; shift ;;
+        *) break ;;
+    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
+    echo "# Building files for test..."
+    if [ x$interleave = x ] ; then
+	
+	#
+	# Create all files sequentially
+	#
+	
+	for i in `seq 1 $numfiles` ; do
+	    dd of=$dir/testfile_$i if=/dev/zero bs=1$ddmega count=$filesize >/dev/null 2>&1
+	done
+    else
+	
+	#
+	# Create files interleaved, adding $write_blocksize to each
+	# file in turn.
+	#
+	
+	size=0
+	limit=`expr $filesize * 1048576`
+	while [ $size -lt $limit ] ; do
+	    for i in `seq 1 $numfiles` ; do
+		dd if=/dev/zero bs=$write_blocksize count=1 >> $dir/testfile_$i 2>/dev/null
+	    done
+	    size=`expr $size + $write_blocksize`
+	done
+    fi
+fi
+
+for bs in $@ ; do
+
+    if uname -a | grep --silent arwin ; then
+        # clears cache on OS X
+        sudo purge
+    elif [ -f /proc/sys/vm/drop_caches ] ; then
+        # Linux cache clearing
+        echo 3 | sudo tee /proc/sys/vm/drop_caches >/dev/null
+    else       
+        # need an alternative for other operating systems
+        :
+    fi
+    
+    echo "# Blocksize $bs"
+    ./thread_readtest $args -b $bs -q $dir/testfile_%d
+done