[PATCH blktests v3 13/13] zbd/005: Test write ordering

Shin'ichiro Kawasaki
2019-01-18T09:45:55Z

From: Masato Suzuki <masato.suzuki@wdc.com>

Run a high queue depth direct sequential write fio job to check that
write requests are not being reordered when the deadline scheduler is
used. This test allowed to catch a bug fixed with commit
80e02039721 "block: mq-deadline: Fix write completion handling".

Signed-off-by: Masato Suzuki <masato.suzuki@wdc.com>
---
tests/zbd/005 | 67 +++++++++++++++++++++++++++++++++++++++++++++++
tests/zbd/005.out | 2 ++
2 files changed, 69 insertions(+)
create mode 100755 tests/zbd/005
create mode 100644 tests/zbd/005.out

diff --git a/tests/zbd/005 b/tests/zbd/005
new file mode 100755
index 0000000..bc9cad5
--- /dev/null
+++ b/tests/zbd/005
@@ -0,0 +1,67 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-3.0+
+# Copyright (C) 2018 Western Digital Corporation or its affiliates.
+#
+# Run a high queue depth direct sequential write fio job to check that
+# write requests are not being reordered when the deadline scheduler is
+# used. This test allowed to catch a bug fixed with commit 80e02039721
+# "block: mq-deadline: Fix write completion handling".
+
+. tests/zbd/rc
+
+DESCRIPTION="write command ordering"
+TIMED=1
+CAN_BE_ZONED=1
+
+requires() {
+ _have_fio_zbd_zonemode
+}
+
+fallback_device() {
+ _fallback_null_blk_zoned
+}
+
+cleanup_fallback_device() {
+ _exit_null_blk
+}
+
+_find_first_sequential_zone() {
+ for ((idx = NR_CONV_ZONES; idx < REPORTED_COUNT; idx++)); do
+ if [[ ${ZONE_TYPES[idx]} -eq ${ZONE_TYPE_SEQ_WRITE_REQUIRED} ]];
+ then
+ echo "${idx}"
+ return 0
+ fi
+ done
+ echo "Sequential write required zone not found"
+
+ return 1
+}
+
+test_device() {
+ local -i zone_idx
+ local -i offset
+
+ echo "Running ${TEST_NAME}"
+
+ _get_sysfs_variable "${TEST_DEV}" || return $?
+ _get_blkzone_report "${TEST_DEV}" || return $?
+
+ zone_idx=$(_find_first_sequential_zone) || return $?
+ offset=$((ZONE_STARTS[zone_idx] * 512))
+
+ blkzone reset -o "${ZONE_STARTS[zone_idx]}" "${TEST_DEV}"
+
+ _test_dev_queue_set scheduler deadline
+
+ : "${TIMEOUT:=30}"
+ FIO_PERF_FIELDS=("write io" "write iops")
+ _fio_perf --filename="${TEST_DEV}" --name zbdwo --rw=write --direct=1 \
+ --ioengine=libaio --iodepth=128 --bs=256k \
+ --offset="${offset}"
+
+ _put_blkzone_report
+ _put_sysfs_variable
+
+ echo "Test complete"
+}
diff --git a/tests/zbd/005.out b/tests/zbd/005.out
new file mode 100644
index 0000000..3ff78c6
--- /dev/null
+++ b/tests/zbd/005.out
@@ -0,0 +1,2 @@
+Running zbd/005
+Test complete
--
2.20.1