Re: [PATCH 2/6] tests/nvme: add new test for rand-read on the nvme character device

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On Fri, Dec 23, 2022 at 07:56:35AM -0800, Luis Chamberlain wrote:
On Fri, Dec 23, 2022 at 06:41:37PM +0530, Kanchan Joshi wrote:
On Wed, Dec 21, 2022 at 02:34:37AM -0800, Luis Chamberlain wrote:
> This does basic rand-read testing of the character device of a
> conventional NVMe drive.
>
> Signed-off-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
> ---
> tests/nvme/046     | 42 ++++++++++++++++++++++++++++++++++++++++++
> tests/nvme/046.out |  2 ++
> 2 files changed, 44 insertions(+)
> create mode 100755 tests/nvme/046
> create mode 100644 tests/nvme/046.out
>
> diff --git a/tests/nvme/046 b/tests/nvme/046
> new file mode 100755
> index 000000000000..3526ab9eedab
> --- /dev/null
> +++ b/tests/nvme/046
> @@ -0,0 +1,42 @@
> +#!/bin/bash
> +# SPDX-License-Identifier: GPL-3.0+
> +# Copyright (C) 2022 Luis Chamberlain <mcgrof@xxxxxxxxxx>
> +#
> +# This does basic sanity test for the nvme character device. This is a basic
> +# test and if it fails it is probably very likely other nvme character device
> +# tests would fail.
> +#
> +. tests/nvme/rc
> +
> +DESCRIPTION="basic rand-read io_uring_cmd engine for nvme-ns character device"
> +QUICK=1
> +
> +requires() {
> +	_nvme_requires
> +	_have_fio
> +}
> +
> +device_requires() {
> +	_require_test_dev_is_nvme
> +}
> +
> +test_device() {
> +	echo "Running ${TEST_NAME}"
> +	local ngdev=${TEST_DEV/nvme/ng}
> +	local fio_args=(
> +		--size=1M
> +		--cmd_type=nvme
> +		--filename="$ngdev"
> +		--time_based
> +		--runtime=10
> +	) &&

Is this && needed?

This form was inspired by commit 238c7e0b by Bart, but yeah you're
right, I can't see any reason for it, so we can clean zbd/010 from it too.

> +	_run_fio_rand_iouring_cmd "${fio_args[@]}" >>"${FULL}" 2>&1 ||

Something to change here (and therefore in other patches too).
If we change "cmd_type = something_random", test continues to show the
success while it should show failure.

Definitely no bueno.

How about changing above line to:
_run_fio_rand_iouring_cmd "${fio_args[@]}" || fail=true

We'd loose the 046.full log then.

If we just return $? at the end of _run_fio_rand_iouring_cmd() that
seems to fix the undetected error. Whatyda think?

It did not fix for me. It still shows test passed for "cmd_type=random".
How about this one instead-

_run_fio_rand_iouring_cmd "${fio_args[@]}" >>"${FULL}" || fail=true

it retains the full log, and shows the error when it occurs.
I noticed an odd thing in the last two patches which work for zone
storage, if I change the runtime it doesn't take longer, so I think
something is still off there too... can you take a look?

Runtime change works fine for first zoned test (i.e. read one). For the last one (i.e. zbd/012), fio fails early (that's why runtime
does not have any impact) because rw is set to randread along with
verify. It should rather be set to write.





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