2023-05-11 14:12:35

by Daniel Wagner

[permalink] [raw]
Subject: [PATCH blktests v4 00/11] nvme testsuite runtime optimization

I've updated the series with the comments from the last round.

changes
v4:
- renamed test
- updated commit messages
- fixed whitespace damage
- fixed ShellCheck reports
- dropped 'limit number of random jobs'
- fio runtime 'invinity' changed to 1d
- fixed typo and updated documentation
- added tags

v3:
- 'nvme/rc' instead of 'nvme-rc' subject prefi x
- fixed spaces vs tabs indention
- nvme/014, nvme/015 dropped -1 in #block calculation
- common/xfs: use 'tail -1' instead 'awk'
- common/xfs: no need for printf for integer division
- nvme/035 limit disk size via nvme_img_size
- set defaults to previous values: nvme_img_size=1G, nvme_num_iter=1000
- nvme/032, nvme/040 let fio figure out image size
set timeout to infinity
cleanup fio
- add documentation for nvme_tr_type, nvme_img_size and nvme_num_iter
- limited nproc to 32 for num jobs for random fio job
- drop job size limit calculation
- drop nvme_num_iter from nvme/002
- limit xfs fio job size inside _xfs_run_fio_verify_io()
- added reviewed tags
- https://lore.kernel.org/linux-nvme/[email protected]/

v2:
- made image size configurable via nvme_img_size env
- make number of iteration configurable via nvme_num_iter
- do not hard code test values
- calculate job size
- use runtime for fio background jobs
- https://lore.kernel.org/linux-nvme/[email protected]/

v1:
- initial version
- https://lore.kernel.org/linux-nvme/[email protected]/

Daniel Wagner (11):
nvme/rc: Auto convert test device size info
nvme{014/015}: Do not hard code device size for dd test
common/xfs: Make size argument optional for _xfs_run_fio_verify_io
common/xfs: Limit fio size job to fit into xfs fs
nvme{032,040}: Use runtime fio background jobs
Documentation: Add info on nvme_trtype
nvme: Make test image size configurable
nvme: Add minimal test image size requirement
nvme{045,047}: Calculate IO size for random fio jobs
nvme{002,030}: Move discovery generation counter code to rc
nvme{016,017}: Make the number iterations configurable

Documentation/running-tests.md | 12 +
common/rc | 30 +-
common/xfs | 17 +-
tests/nvme/002 | 4 +-
tests/nvme/002.out | 3004 --------------------------------
tests/nvme/004 | 2 +-
tests/nvme/005 | 2 +-
tests/nvme/006 | 2 +-
tests/nvme/007 | 2 +-
tests/nvme/008 | 2 +-
tests/nvme/009 | 2 +-
tests/nvme/010 | 5 +-
tests/nvme/011 | 5 +-
tests/nvme/012 | 5 +-
tests/nvme/013 | 5 +-
tests/nvme/014 | 12 +-
tests/nvme/015 | 12 +-
tests/nvme/016 | 2 +-
tests/nvme/017 | 4 +-
tests/nvme/018 | 2 +-
tests/nvme/019 | 2 +-
tests/nvme/020 | 2 +-
tests/nvme/021 | 2 +-
tests/nvme/022 | 2 +-
tests/nvme/023 | 2 +-
tests/nvme/024 | 2 +-
tests/nvme/025 | 2 +-
tests/nvme/026 | 2 +-
tests/nvme/027 | 2 +-
tests/nvme/028 | 2 +-
tests/nvme/029 | 2 +-
tests/nvme/030 | 22 +-
tests/nvme/031 | 2 +-
tests/nvme/032 | 4 +-
tests/nvme/034 | 2 +-
tests/nvme/035 | 4 +-
tests/nvme/040 | 11 +-
tests/nvme/041 | 2 +-
tests/nvme/042 | 2 +-
tests/nvme/043 | 2 +-
tests/nvme/044 | 2 +-
tests/nvme/045 | 6 +-
tests/nvme/047 | 8 +-
tests/nvme/048 | 2 +-
tests/nvme/rc | 40 +
45 files changed, 183 insertions(+), 3079 deletions(-)

--
2.40.0



2023-05-11 14:12:38

by Daniel Wagner

[permalink] [raw]
Subject: [PATCH blktests v4 09/11] nvme{045,047}: Calculate IO size for random fio jobs

_nvme_calc_run_io_size() returns the jobs size for _run_fio_rand_io()
function. The jobs size is the size per job, thus we have to divide
through the number of CPUs.

_xfs_run_fio_verify_io() is replaced with _run_fio_rand_io() because the
former has a minimum nvme_img_size of 350M. Both tests nvme/{045,047}
just want some IO to verify that the path is working. Thus reduce the
min nmve_img_size requirement switch to _run_fio_rand_io()

Signed-off-by: Daniel Wagner <[email protected]>
---
tests/nvme/045 | 4 +++-
tests/nvme/047 | 6 ++++--
tests/nvme/rc | 10 ++++++++++
3 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/tests/nvme/045 b/tests/nvme/045
index 99012f6bed8f..f50087cccb6a 100755
--- a/tests/nvme/045
+++ b/tests/nvme/045
@@ -31,6 +31,7 @@ test() {
local ctrlkey
local new_ctrlkey
local ctrldev
+ local rand_io_size

echo "Running ${TEST_NAME}"

@@ -120,7 +121,8 @@ test() {

nvmedev=$(_find_nvme_dev "${subsys_name}")

- _run_fio_rand_io --size=4m --filename="/dev/${nvmedev}n1"
+ rand_io_size="$(_nvme_calc_rand_io_size 4m)"
+ _run_fio_rand_io --size="${rand_io_size}" --filename="/dev/${nvmedev}n1"

_nvme_disconnect_subsys "${subsys_name}"

diff --git a/tests/nvme/047 b/tests/nvme/047
index b5a8d469a983..6a7599bc2e91 100755
--- a/tests/nvme/047
+++ b/tests/nvme/047
@@ -25,6 +25,7 @@ test() {
local port
local nvmedev
local loop_dev
+ local rand_io_size
local file_path="$TMPDIR/img"
local subsys_name="blktests-subsystem-1"

@@ -42,7 +43,8 @@ test() {

nvmedev=$(_find_nvme_dev "${subsys_name}")

- _xfs_run_fio_verify_io /dev/"${nvmedev}n1" "1m" || echo FAIL
+ rand_io_size="$(_nvme_calc_rand_io_size 4M)"
+ _run_fio_rand_io --filename="/dev/${nvmedev}n1" --size="${rand_io_size}"

_nvme_disconnect_subsys "${subsys_name}" >> "$FULL" 2>&1

@@ -50,7 +52,7 @@ test() {
--nr-write-queues 1 \
--nr-poll-queues 1 || echo FAIL

- _xfs_run_fio_verify_io /dev/"${nvmedev}n1" "1m" || echo FAIL
+ _run_fio_rand_io --filename="/dev/${nvmedev}n1" --size="${rand_io_size}"

_nvme_disconnect_subsys "${subsys_name}" >> "$FULL" 2>&1

diff --git a/tests/nvme/rc b/tests/nvme/rc
index c951339fad7d..277057eef7c5 100644
--- a/tests/nvme/rc
+++ b/tests/nvme/rc
@@ -150,6 +150,16 @@ _test_dev_nvme_nsid() {
cat "${TEST_DEV_SYSFS}/nsid"
}

+_nvme_calc_rand_io_size() {
+ local img_size_mb
+ local io_size_kb
+
+ img_size_mb="$(convert_to_mb "$1")"
+ io_size_kb="$(((img_size_mb * 1024) / $(nproc)))"
+
+ echo "${io_size_kb}k"
+}
+
_nvme_fcloop_add_rport() {
local local_wwnn="$1"
local local_wwpn="$2"
--
2.40.0


2023-05-11 14:13:05

by Daniel Wagner

[permalink] [raw]
Subject: [PATCH blktests v4 11/11] nvme{016,017}: Make the number iterations configurable

Some tests hard code high values of iterations. This makes them run
relatively long compared to the other tests. Introduce a new environment
variable nvme_num_iter to allow tune the runtime.

Reviewed-by: Hannes Reinecke <[email protected]>
Reviewed-by: Chaitanya Kulkarni <[email protected]>
Signed-off-by: Daniel Wagner <[email protected]>
---
Documentation/running-tests.md | 2 ++
tests/nvme/016 | 2 +-
tests/nvme/017 | 2 +-
tests/nvme/rc | 1 +
4 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/Documentation/running-tests.md b/Documentation/running-tests.md
index 4d8393f2002d..b35ae10316e4 100644
--- a/Documentation/running-tests.md
+++ b/Documentation/running-tests.md
@@ -107,6 +107,8 @@ The NVMe tests can be additionally parameterized via environment variables.
- nvme_img_size: '1G' (default)
Run the tests with given image size in bytes. 'm', 'M', 'g'
and 'G' postfix are supported.
+- nvme_num_iter: 1000 (default)
+ The number of iterations a test should do.

### Running nvme-rdma nvmeof-mp srp tests

diff --git a/tests/nvme/016 b/tests/nvme/016
index 4eba30223a08..c0c31a55b190 100755
--- a/tests/nvme/016
+++ b/tests/nvme/016
@@ -17,7 +17,7 @@ test() {
echo "Running ${TEST_NAME}"

local port
- local iterations=1000
+ local iterations="${nvme_num_iter}"
local loop_dev
local subsys_nqn="blktests-subsystem-1"

diff --git a/tests/nvme/017 b/tests/nvme/017
index 0248aee9bc41..e1674508f654 100755
--- a/tests/nvme/017
+++ b/tests/nvme/017
@@ -18,7 +18,7 @@ test() {

local port
local file_path
- local iterations=1000
+ local iterations="${nvme_num_iter}"
local subsys_name="blktests-subsystem-1"

_setup_nvmet
diff --git a/tests/nvme/rc b/tests/nvme/rc
index 11357cbf7816..933b585643ac 100644
--- a/tests/nvme/rc
+++ b/tests/nvme/rc
@@ -18,6 +18,7 @@ def_hostnqn="$(cat /etc/nvme/hostnqn 2> /dev/null)"
def_hostid="$(cat /etc/nvme/hostid 2> /dev/null)"
nvme_trtype=${nvme_trtype:-"loop"}
nvme_img_size=${nvme_img_size:-"1G"}
+nvme_num_iter=${nvme_num_iter:-"1000"}

_nvme_requires() {
_have_program nvme
--
2.40.0


2023-05-11 14:17:10

by Daniel Wagner

[permalink] [raw]
Subject: [PATCH blktests v4 10/11] nvme{002,030}: Move discovery generation counter code to rc

Move the discovery generation counter code to rc so that we can reuse
it in 002.

Reviewed-by: Hannes Reinecke <[email protected]>
Signed-off-by: Daniel Wagner <[email protected]>
---
tests/nvme/002 | 4 +-
tests/nvme/002.out | 3004 --------------------------------------------
tests/nvme/030 | 22 +-
tests/nvme/rc | 13 +
4 files changed, 20 insertions(+), 3023 deletions(-)

diff --git a/tests/nvme/002 b/tests/nvme/002
index 6c6ae5fea89b..6b8484844b4d 100755
--- a/tests/nvme/002
+++ b/tests/nvme/002
@@ -27,12 +27,14 @@ test() {
local loop_dev
loop_dev="$(losetup -f)"

+ local genctr=1
+
for ((i = 0; i < iterations; i++)); do
_create_nvmet_subsystem "blktests-subsystem-$i" "${loop_dev}"
_add_nvmet_subsys_to_port "${port}" "blktests-subsystem-$i"
done

- _nvme_discover "${nvme_trtype}" | _filter_discovery
+ genctr=$(_check_genctr "${genctr}" "adding a subsystem to a port")

for ((i = iterations - 1; i >= 0; i--)); do
_remove_nvmet_subsystem_from_port "${port}" "blktests-subsystem-$i"
diff --git a/tests/nvme/002.out b/tests/nvme/002.out
index c33d7d306ed2..98554ddb0ca6 100644
--- a/tests/nvme/002.out
+++ b/tests/nvme/002.out
@@ -1,3006 +1,2 @@
Running nvme/002
-Discovery Log Number of Records 1001, Generation counter X
-=====Discovery Log Entry 0======
-trtype: loop
-subnqn: nqn.2014-08.org.nvmexpress.discovery
-=====Discovery Log Entry 1======
-trtype: loop
-subnqn: blktests-subsystem-0
-=====Discovery Log Entry 2======
-trtype: loop
-subnqn: blktests-subsystem-1
-=====Discovery Log Entry 3======
-trtype: loop
-subnqn: blktests-subsystem-2
-=====Discovery Log Entry 4======
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Test complete
diff --git a/tests/nvme/030 b/tests/nvme/030
index 20fef696e565..cfcdcbe6be23 100755
--- a/tests/nvme/030
+++ b/tests/nvme/030
@@ -15,20 +15,6 @@ requires() {
_require_nvme_trtype_is_fabrics
}

-
-checkgenctr() {
- local last=$1
- local msg=$2
- local genctr
-
- genctr=$(_discovery_genctr)
- if (( "${genctr}" <= "${last}" )); then
- echo "Generation counter not incremented when ${msg} (${genctr} <= ${last})"
- fi
-
- echo "${genctr}"
-}
-
test() {
local port
local genctr
@@ -48,20 +34,20 @@ test() {
_create_nvmet_subsystem "${subsys}2" "$(losetup -f)"
_add_nvmet_subsys_to_port "${port}" "${subsys}2"

- genctr=$(checkgenctr "${genctr}" "adding a subsystem to a port")
+ genctr=$(_check_genctr "${genctr}" "adding a subsystem to a port")

echo 0 > "${NVMET_CFS}/subsystems/${subsys}2/attr_allow_any_host"

- genctr=$(checkgenctr "${genctr}" "clearing attr_allow_any_host")
+ genctr=$(_check_genctr "${genctr}" "clearing attr_allow_any_host")

echo 1 > "${NVMET_CFS}/subsystems/${subsys}2/attr_allow_any_host"

- genctr=$(checkgenctr "${genctr}" "setting attr_allow_any_host")
+ genctr=$(_check_genctr "${genctr}" "setting attr_allow_any_host")

_remove_nvmet_subsystem_from_port "${port}" "${subsys}2"
_remove_nvmet_subsystem "${subsys}2"

- genctr=$(checkgenctr "${genctr}" "removing a subsystem from a port")
+ genctr=$(_check_genctr "${genctr}" "removing a subsystem from a port")

_remove_nvmet_subsystem_from_port "${port}" "${subsys}1"
_remove_nvmet_subsystem "${subsys}1"
diff --git a/tests/nvme/rc b/tests/nvme/rc
index 277057eef7c5..11357cbf7816 100644
--- a/tests/nvme/rc
+++ b/tests/nvme/rc
@@ -744,6 +744,19 @@ _discovery_genctr() {
sed -n -e 's/^.*Generation counter \([0-9]\+\).*$/\1/p'
}

+_check_genctr() {
+ local last=$1
+ local msg=$2
+ local genctr
+
+ genctr=$(_discovery_genctr)
+ if (( "${genctr}" <= "${last}" )); then
+ echo "Generation counter not incremented when ${msg} (${genctr} <= ${last})"
+ fi
+
+ echo "${genctr}"
+}
+
declare -A NS_DEV_FAULT_INJECT_SAVE
declare -A CTRL_DEV_FAULT_INJECT_SAVE

--
2.40.0


2023-05-11 14:18:31

by Daniel Wagner

[permalink] [raw]
Subject: [PATCH blktests v4 06/11] Documentation: Add info on nvme_trtype

Mention that the nvme tests can be parametrized.

Reviewed-by: Chaitanya Kulkarni <[email protected]>
Signed-off-by: Daniel Wagner <[email protected]>
---
Documentation/running-tests.md | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/Documentation/running-tests.md b/Documentation/running-tests.md
index 3550f377f487..33c2a512eb6b 100644
--- a/Documentation/running-tests.md
+++ b/Documentation/running-tests.md
@@ -98,6 +98,13 @@ requires that the kernel be compiled with `CONFIG_BLK_DEV_ZONED` enabled.
RUN_ZONED_TESTS=1
```

+### NVMe test parameterizing
+
+The NVMe tests can be additionally parameterized via environment variables.
+
+- nvme_trtype: 'loop' (default), 'tcp', 'rdma' and 'fc'
+ Run the tests with the given transport.
+
### Running nvme-rdma nvmeof-mp srp tests

Most of these tests will use the rdma_rxe (soft-RoCE) driver by default. The siw (soft-iWARP) driver is also supported.
--
2.40.0


2023-05-11 14:19:07

by Daniel Wagner

[permalink] [raw]
Subject: [PATCH blktests v4 03/11] common/xfs: Make size argument optional for _xfs_run_fio_verify_io

Make the size argument optional by reading the filesystem info. The
caller doesn't have to guess (or calculate) how big the max IO size.
The log data structure of XFS is reducing the capacity.

Reviewed-by: Chaitanya Kulkarni <[email protected]>
Signed-off-by: Daniel Wagner <[email protected]>
---
common/xfs | 14 +++++++++++++-
tests/nvme/012 | 2 +-
tests/nvme/013 | 2 +-
3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/common/xfs b/common/xfs
index 2c5d96164ac1..413c2820ffaf 100644
--- a/common/xfs
+++ b/common/xfs
@@ -24,10 +24,22 @@ _xfs_run_fio_verify_io() {
local mount_dir="/mnt/blktests"
local bdev=$1
local sz=$2
+ local sz_mb
+ local avail
+ local avail_mb

_xfs_mkfs_and_mount "${bdev}" "${mount_dir}" >> "${FULL}" 2>&1

- _run_fio_verify_io --size="$sz" --directory="${mount_dir}/"
+ avail="$(df --output=avail "${mount_dir}" | tail -1)"
+ avail_mb="$((avail / 1024))"
+
+ if [[ -z "${sz}" ]]; then
+ sz_mb="${avail_mb}"
+ else
+ sz_mb="$(convert_to_mb "${sz}")"
+ fi
+
+ _run_fio_verify_io --size="${sz_mb}m" --directory="${mount_dir}/"

umount "${mount_dir}" >> "${FULL}" 2>&1
rm -fr "${mount_dir}"
diff --git a/tests/nvme/012 b/tests/nvme/012
index e60082c2e751..c9d24388306d 100755
--- a/tests/nvme/012
+++ b/tests/nvme/012
@@ -44,7 +44,7 @@ test() {
cat "/sys/block/${nvmedev}n1/uuid"
cat "/sys/block/${nvmedev}n1/wwid"

- _xfs_run_fio_verify_io "/dev/${nvmedev}n1" "900m"
+ _xfs_run_fio_verify_io "/dev/${nvmedev}n1"

_nvme_disconnect_subsys "${subsys_name}"

diff --git a/tests/nvme/013 b/tests/nvme/013
index 9d60a7df4577..265b6968fd34 100755
--- a/tests/nvme/013
+++ b/tests/nvme/013
@@ -41,7 +41,7 @@ test() {
cat "/sys/block/${nvmedev}n1/uuid"
cat "/sys/block/${nvmedev}n1/wwid"

- _xfs_run_fio_verify_io "/dev/${nvmedev}n1" "900m"
+ _xfs_run_fio_verify_io "/dev/${nvmedev}n1"

_nvme_disconnect_subsys "${subsys_name}"

--
2.40.0


2023-05-11 14:19:38

by Daniel Wagner

[permalink] [raw]
Subject: [PATCH blktests v4 04/11] common/xfs: Limit fio size job to fit into xfs fs

The usable capacity of the filesystem is less than the raw
partition/device size due to the additional meta/log data.

Ensure that the job size for fio is not exceeding the limits.

Because we have hard coded the path where we mount the filesystem
and don't want to expose this, we just update max size inside
_xfs_run_fio_verify_io(). No need to leak this into the caller.

Signed-off-by: Daniel Wagner <[email protected]>
---
common/xfs | 3 +++
1 file changed, 3 insertions(+)

diff --git a/common/xfs b/common/xfs
index 413c2820ffaf..37ce85878df2 100644
--- a/common/xfs
+++ b/common/xfs
@@ -37,6 +37,9 @@ _xfs_run_fio_verify_io() {
sz_mb="${avail_mb}"
else
sz_mb="$(convert_to_mb "${sz}")"
+ if [[ "${sz_mb}" -gt "${avail_mb}" ]]; then
+ sz_mb="${avail_mb}"
+ fi
fi

_run_fio_verify_io --size="${sz_mb}m" --directory="${mount_dir}/"
--
2.40.0


2023-05-13 11:00:54

by Chaitanya Kulkarni

[permalink] [raw]
Subject: Re: [PATCH blktests v4 10/11] nvme{002,030}: Move discovery generation counter code to rc

On 5/11/23 07:09, Daniel Wagner wrote:
> Move the discovery generation counter code to rc so that we can reuse
> it in 002.
>
> Reviewed-by: Hannes Reinecke <[email protected]>
> Signed-off-by: Daniel Wagner <[email protected]>
> ---
>

Looks good.

Reviewed-by: Chaitanya Kulkarni <[email protected]>

-ck


2023-05-17 04:52:23

by Chaitanya Kulkarni

[permalink] [raw]
Subject: Re: [PATCH blktests v4 09/11] nvme{045,047}: Calculate IO size for random fio jobs

On 5/11/23 07:09, Daniel Wagner wrote:
> _nvme_calc_run_io_size() returns the jobs size for _run_fio_rand_io()
> function. The jobs size is the size per job, thus we have to divide
> through the number of CPUs.

sorry I didn't understand why we have to divide through number of
CPUs ? isn't tht will change the current job size of the test ?

unless we are increasing somewhere which I missed it .

-ck


2023-05-17 04:53:04

by Chaitanya Kulkarni

[permalink] [raw]
Subject: Re: [PATCH blktests v4 04/11] common/xfs: Limit fio size job to fit into xfs fs

On 5/11/23 07:09, Daniel Wagner wrote:
> The usable capacity of the filesystem is less than the raw
> partition/device size due to the additional meta/log data.
>
> Ensure that the job size for fio is not exceeding the limits.
>
> Because we have hard coded the path where we mount the filesystem
> and don't want to expose this, we just update max size inside
> _xfs_run_fio_verify_io(). No need to leak this into the caller.
>
> Signed-off-by: Daniel Wagner <[email protected]>
> ---
>

make sense for the xfs fio verify, looks good.

Reviewed-by: Chaitanya Kulkarni <[email protected]>

-ck


2023-05-19 01:52:48

by Shinichiro Kawasaki

[permalink] [raw]
Subject: Re: [PATCH blktests v4 09/11] nvme{045,047}: Calculate IO size for random fio jobs

On May 17, 2023 / 04:44, Chaitanya Kulkarni wrote:
> On 5/11/23 07:09, Daniel Wagner wrote:
> > _nvme_calc_run_io_size() returns the jobs size for _run_fio_rand_io()
> > function. The jobs size is the size per job, thus we have to divide
> > through the number of CPUs.
>
> sorry I didn't understand why we have to divide through number of
> CPUs ? isn't tht will change the current job size of the test ?
>
> unless we are increasing somewhere which I missed it .

This change reduces the I/O size per job, but it keeps the total I/O size
regardless of the number of CPUs. This will keep test case runtime reasonable
on systems with hundreds of CPUs.

As for the test case nvme/045, it tests re-authentication. I don't think it
requires total I/O size proportional to number of CPUs. As for the test case
nvme/047, it exercises different queue types (write queue and poll queue). Does
it require total I/O size proportional to number of CPUs? Daniel is the test
case author, and I guessed he is ok with the change.

2023-05-26 00:07:47

by Shinichiro Kawasaki

[permalink] [raw]
Subject: Re: [PATCH blktests v4 00/11] nvme testsuite runtime optimization

On May 11, 2023 / 16:09, Daniel Wagner wrote:
> I've updated the series with the comments from the last round.
>
> changes
> v4:
> - renamed test
> - updated commit messages
> - fixed whitespace damage
> - fixed ShellCheck reports
> - dropped 'limit number of random jobs'
> - fio runtime 'invinity' changed to 1d
> - fixed typo and updated documentation
> - added tags

I've applied this v4 series. Thanks!

2023-06-01 09:16:34

by Daniel Wagner

[permalink] [raw]
Subject: Re: [PATCH blktests v4 09/11] nvme{045,047}: Calculate IO size for random fio jobs

Sorry for the late response, had to deal with a lot of high prio stuff...

On Fri, May 19, 2023 at 01:36:17AM +0000, Shinichiro Kawasaki wrote:
> On May 17, 2023 / 04:44, Chaitanya Kulkarni wrote:
> > On 5/11/23 07:09, Daniel Wagner wrote:
> > > _nvme_calc_run_io_size() returns the jobs size for _run_fio_rand_io()
> > > function. The jobs size is the size per job, thus we have to divide
> > > through the number of CPUs.
> >
> > sorry I didn't understand why we have to divide through number of
> > CPUs ? isn't tht will change the current job size of the test ?
> >
> > unless we are increasing somewhere which I missed it .
>
> This change reduces the I/O size per job, but it keeps the total I/O size
> regardless of the number of CPUs. This will keep test case runtime reasonable
> on systems with hundreds of CPUs.

Yes, indeed.

> As for the test case nvme/045, it tests re-authentication. I don't think it
> requires total I/O size proportional to number of CPUs. As for the test case
> nvme/047, it exercises different queue types (write queue and poll queue). Does
> it require total I/O size proportional to number of CPUs? Daniel is the test
> case author, and I guessed he is ok with the change.

Yes :)

Thanks for applying these patches!