b=19414

i=Brian
cmd3-33 port to acc-sm: read-ahead test

diff --git a/lustre/tests/large-scale.sh b/lustre/tests/large-scale.sh
index 43b27a2..d647684 100644 (file)
--- a/lustre/tests/large-scale.sh
+++ b/lustre/tests/large-scale.sh
@@ -44,18 +44,6 @@ check_vbr || \
 FAKE_NUM_MAX=${FAKE_NUM_MAX:-1000}
 [ "$SLOW" = "no" ] && FAKE_NUM_MAX=100
 
-do_and_time () {
-   local cmd=$1
-
-   local start_ts=`date +%s`
-
-   $cmd
-
-   local current_ts=`date +%s`
-   ELAPSED=`expr $current_ts - $start_ts`
-   echo "===== START $start_ts CURRENT $current_ts"
-}
-
 delete_fake_exports () {
     NUM=$(do_facet mds "lctl get_param -n mds.${mds_svc}.stale_exports|wc -l")
 
@@ -87,8 +75,8 @@ test_1b() {
         NUM=$(do_facet mds "lctl get_param -n mds.${mds_svc}.stale_exports|wc -l")
         [ $NUM -lt $FAKE_NUM ] && error "fake exports $NUM -ne $FAKE_NUM"
         echo "===== STALE EXPORTS: FAKE_NUM=$FAKE_NUM NUM=$NUM"
-        do_and_time "zconf_mount_clients $CLIENTS $DIR"
-        echo "==== $TESTNAME ===== CONNECTION TIME $ELAPSED: FAKE_NUM=$FAKE_NUM CLIENTCOUNT=$CLIENTCOUNT"
+        local elapsed=$(do_and_time "zconf_mount_clients $CLIENTS $DIR")
+        echo "==== $TESTNAME ===== CONNECTION TIME $elapsed: FAKE_NUM=$FAKE_NUM CLIENTCOUNT=$CLIENTCOUNT"
 
         # do_facet mds "lctl set_param mds.${mds_svc}.flush_stale_exports=1"
         delete_fake_exports
@@ -174,8 +162,8 @@ test_1d() {
         EX_NUM=$(do_facet mds "lctl get_param -n mds.${mds_svc}.stale_exports|grep -c EXPIRED")
         [ "$EX_NUM" -eq "$NUM" ] || error "not all exports are expired $EX_NUM != $NUM"
 
-        do_and_time "zconf_mount_clients $CLIENTS $DIR"
-        echo "==== $TESTNAME===== CONNECTION TIME $ELAPSED: expired FAKE_NUM=$FAKE_NUM CLIENTCOUNT=$CLIENTCOUNT"
+        local elapsed=$(do_and_time "zconf_mount_clients $CLIENTS $DIR")
+        echo "==== $TESTNAME===== CONNECTION TIME $elapsed: expired FAKE_NUM=$FAKE_NUM CLIENTCOUNT=$CLIENTCOUNT"
 
         do_facet mds "lctl set_param mds.${mds_svc}.stale_export_age=$OLD_AGE"
     done

diff --git a/lustre/tests/sanity.sh b/lustre/tests/sanity.sh
index 5c00a02..bd6b01c 100644 (file)
--- a/lustre/tests/sanity.sh
+++ b/lustre/tests/sanity.sh
@@ -3865,6 +3865,51 @@ test_101c() {
 }
 run_test 101c "check stripe_size aligned read-ahead ================="
 
+set_read_ahead() {
+   lctl get_param -n llite.*.max_read_ahead_mb | head -n 1
+   lctl set_param -n llite.*.max_read_ahead_mb $1 > /dev/null 2>&1
+}
+
+test_101d() {
+    local file=$DIR/$tfile
+    local size=${FILESIZE_101c:-500}
+    local ra_MB=${READAHEAD_MB:-40}
+
+    local space=$(df -P $DIR | tail -n 1 | awk '{ print $4 }')
+    [ $space -gt $((size / 1024)) ] || 
+        { skip "Need free space ${size}M, have $space" && return; }
+
+    echo Creating ${size}M test file $file
+    dd if=/dev/zero of=$file bs=1M count=$size
+    echo Cancel LRU locks on lustre client to flush the client cache
+    cancel_lru_locks osc
+
+    echo Disable read-ahead
+    local old_READAHEAD=$(set_read_ahead 0)
+
+    echo Reading the test file $file with read-ahead disabled
+    time_ra_OFF=$(do_and_time "dd if=$file of=/dev/null bs=1M count=$size")
+
+    echo Cancel LRU locks on lustre client to flush the client cache
+    cancel_lru_locks osc
+    echo Enable read-ahead with ${ra_MB}MB
+    set_read_ahead $ra_MB
+
+    echo Reading the test file $file with read-ahead enabled
+    time_ra_ON=$(do_and_time "dd if=$file of=/dev/null bs=1M count=$size")
+
+    echo read-ahead disabled time read $time_ra_OFF
+    echo read-ahead enabled  time read $time_ra_ON
+
+    set_read_ahead $old_READAHEAD
+    rm -f $file
+
+    [ $time_ra_ON -lt $time_ra_OFF ] ||
+        error "read-ahead enabled  time read (${time_ra_ON}s) is more than
+               read-ahead disabled time read (${time_ra_OFF}s) filesize ${size}M"
+}
+run_test 101d "file read with and without read-ahead enabled  ================="
+
 export SETUP_TEST102=no
 setup_test102() {
        [ "$SETUP_TEST102" = "yes" ] && return

diff --git a/lustre/tests/test-framework.sh b/lustre/tests/test-framework.sh
index b7adaee..99b89e5 100644 (file)
--- a/lustre/tests/test-framework.sh
+++ b/lustre/tests/test-framework.sh
@@ -2297,6 +2297,19 @@ multiop_bg_pause() {
     return 0
 }
 
+do_and_time () {
+    local cmd=$1
+    local rc
+
+    SECONDS=0
+    eval '$cmd'
+    
+    [ ${PIPESTATUS[0]} -eq 0 ] || rc=1
+
+    echo $SECONDS
+    return $rc
+}
+
 inodes_available () {
     local IFree=$($LFS df -i $MOUNT | grep ^$FSNAME | awk '{print $4}' | sort -un | head -1) || return 1
     echo $IFree