LU-8726 osd-ldiskfs: bypass read for benchmarking

[fs/lustre-release.git] / lustre / tests / sanity.sh

diff --git a/lustre/tests/sanity.sh b/lustre/tests/sanity.sh
index 41754a4..b389e68 100755 (executable)
--- a/lustre/tests/sanity.sh
+++ b/lustre/tests/sanity.sh
@@ -15460,7 +15460,16 @@ test_313() {
 }
 run_test 313 "io should fail after last_rcvd update fail"
 
-test_399() { # LU-7655 for OST fake write
+test_fake_rw() {
+       local read_write=$1
+       if [ "$read_write" = "write" ]; then
+               local dd_cmd="dd if=/dev/zero of=$DIR/$tfile"
+       elif [ "$read_write" = "read" ]; then
+               local dd_cmd="dd of=/dev/null if=$DIR/$tfile"
+       else
+               error "argument error"
+       fi
+
        # turn off debug for performance testing
        local saved_debug=$($LCTL get_param -n debug)
        $LCTL set_param debug=0
@@ -15472,35 +15481,56 @@ test_399() { # LU-7655 for OST fake write
        local blocks=$((ost1_avail_size/2/1024)) # half avail space by megabytes
        [ $blocks -gt 1000 ] && blocks=1000 # 1G in maximum
 
+       if [ "$read_write" = "read" ]; then
+               truncate -s $(expr 1048576 \* $blocks) $DIR/$tfile
+       fi
+
        local start_time=$(date +%s.%N)
-       dd if=/dev/zero of=$DIR/$tfile bs=1M count=$blocks oflag=sync ||
-               error "real dd writing error"
+       $dd_cmd bs=1M count=$blocks oflag=sync ||
+               error "real dd $read_write error"
        local duration=$(bc <<< "$(date +%s.%N) - $start_time")
-       rm -f $DIR/$tfile
 
-       # define OBD_FAIL_OST_FAKE_WRITE        0x238
+       if [ "$read_write" = "write" ]; then
+               rm -f $DIR/$tfile
+       fi
+
+       # define OBD_FAIL_OST_FAKE_RW           0x238
        do_facet ost1 $LCTL set_param fail_loc=0x238
 
        local start_time=$(date +%s.%N)
-       dd if=/dev/zero of=$DIR/$tfile bs=1M count=$blocks oflag=sync ||
-               error "fake dd writing error"
+       $dd_cmd bs=1M count=$blocks oflag=sync ||
+               error "fake dd $read_write error"
        local duration_fake=$(bc <<< "$(date +%s.%N) - $start_time")
 
-       # verify file size
-       cancel_lru_locks osc
-       $CHECKSTAT -t file -s $((blocks * 1024 * 1024)) $DIR/$tfile ||
-               error "$tfile size not $blocks MB"
-
+       if [ "$read_write" = "write" ]; then
+               # verify file size
+               cancel_lru_locks osc
+               $CHECKSTAT -t file -s $((blocks * 1024 * 1024)) $DIR/$tfile ||
+                       error "$tfile size not $blocks MB"
+       fi
        do_facet ost1 $LCTL set_param fail_loc=0
 
-       echo "fake write $duration_fake vs. normal write $duration in seconds"
+       echo "fake $read_write $duration_fake vs. normal $read_write" \
+               "$duration in seconds"
        [ $(bc <<< "$duration_fake < $duration") -eq 1 ] ||
                error_not_in_vm "fake write is slower"
 
        $LCTL set_param -n debug="$saved_debug"
        rm -f $DIR/$tfile
 }
-run_test 399 "fake write should not be slower than normal write"
+test_399a() { # LU-7655 for OST fake write
+       test_fake_rw write
+}
+run_test 399a "fake write should not be slower than normal write"
+
+
+test_399b() { # LU-8726 for OST fake read
+       if [ "$(facet_fstype ost1)" != "ldiskfs" ]; then
+               skip "only for ldiskfs" && return 0
+       fi
+       test_fake_rw read
+}
+run_test 399b "fake read should not be slower than normal read"
 
 test_400a() { # LU-1606, was conf-sanity test_74
        local extra_flags=''