When using fio we should not issue IOs smaller than the device supports.
Today a lot of places have in place 4k, but soon we will have devices
which support bs > ps. For those devices we should check the minimum
supported IO.
However, since we also have a min optimal IO, we might as well use that
as well. By using this we can also leverage the same lookup with stat
whether or not the target file is a block device or a file.
Signed-off-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
---
common/fio | 26 ++++++++++++++++++++++++--
common/rc | 24 ++++++++++++++++++++++++
2 files changed, 48 insertions(+), 2 deletions(-)
diff --git a/common/fio b/common/fio
index b9ea087fc6c5..d147214f3d16 100644
--- a/common/fio
+++ b/common/fio
@@ -189,15 +189,37 @@ _run_fio() {
return $rc
}
+_fio_opts_to_min_io() {
+ local arg path
+ local -i min_io=4096
+
+ for arg in "$@"; do
+ [[ "$arg" =~ ^--filename= || "$arg" =~ --directory= ]] || continue
+ path="${arg##*=}"
+ min_io=$(_min_io "$path")
+ # Keep 4K minimum IO size for historical consistency
+ ((min_io < 4096)) && min_io=4096
+ break
+ done
+
+ echo "$min_io"
+}
+
# Wrapper around _run_fio used if you need some I/O but don't really care much
# about the details
_run_fio_rand_io() {
- _run_fio --bs=4k --rw=randread --norandommap --numjobs="$(nproc)" \
+ local bs
+
+ bs=$(_fio_opts_to_min_io "$@") || return 1
+ _run_fio --bs="$bs" --rw=randread --norandommap --numjobs="$(nproc)" \
--name=reads --direct=1 "$@"
}
_run_fio_verify_io() {
- _run_fio --name=verify --rw=randwrite --direct=1 --ioengine=libaio --bs=4k \
+ local bs
+
+ bs=$(_fio_opts_to_min_io "$@") || return 1
+ _run_fio --name=verify --rw=randwrite --direct=1 --ioengine=libaio --bs="$bs" \
--iodepth=16 --verify=crc32c --verify_state_save=0 "$@"
}
diff --git a/common/rc b/common/rc
index a7e899cfb419..6e7bddc844bf 100644
--- a/common/rc
+++ b/common/rc
@@ -400,6 +400,30 @@ _test_dev_is_partition() {
[[ -n ${TEST_DEV_PART_SYSFS} ]]
}
+_min_io() {
+ local path_or_dev=$1
+ local min_io=4096
+ if [ -z "$path_or_dev" ]; then
+ echo "path for min_io does not exist"
+ return 1
+ fi
+
+ if [ -c "$path_or_dev" ]; then
+ if [[ "$path_or_dev" == /dev/ng* ]]; then
+ path_or_dev="${path_or_dev/ng/nvme}"
+ fi
+ fi
+
+ if [ -e "$path_or_dev" ]; then
+ min_io=$(stat --printf=%o "$path_or_dev")
+ ((min_io < 4096)) && min_io=4096
+ echo "$min_io"
+ else
+ echo "Error: '$path_or_dev' does not exist or is not accessible"
+ return 1
+ fi
+}
+
# Return max open zones or max active zones of the test target device.
# If the device has both, return smaller value.
_test_dev_max_open_active_zones() {
--
2.45.2
