From ff45bf36a605c4839cbdb6bbbfe1440bc37a16bc Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Tue, 13 Nov 2012 13:20:56 +0000
Subject: [PATCH] scripts/blockdev-perftest: Speed up block device size
 determination

git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4615 d57e44dd-8a1f-0410-8b47-8ef2f437770f
---
 scripts/blockdev-perftest | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/scripts/blockdev-perftest b/scripts/blockdev-perftest
index 3d099f493..4b1db9a1b 100755
--- a/scripts/blockdev-perftest
+++ b/scripts/blockdev-perftest
@@ -210,8 +210,7 @@ if [ "${perform_write_test}" = "true" -a ! -w "${device}" ]; then
 fi
 
 if [ "${perform_read_test}" = "true" -a                              \
-     $(dd if="${device}" bs=1M count=$(pow2 $(($log2_io_size - 20))) \
-     2>/dev/null | wc --bytes) -lt $(pow2 $log2_io_size) ]
+     "$(($(</sys/class/block/$(basename $device)/size) * 512))" -lt $(pow2 $log2_io_size) ]
 then
   echo "Error: device ${device} contains less than $(pow2 $log2_io_size) bytes."
   exit 1