From: "Michael S. Tsirkin" <mst@redhat.com>
To: Yunsheng Lin <linyunsheng@huawei.com>
Cc: Jason Wang <jasowang@redhat.com>,
davem@davemloft.net, kuba@kernel.org, brouer@redhat.com,
paulmck@kernel.org, peterz@infradead.org, will@kernel.org,
shuah@kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, linux-kselftest@vger.kernel.org,
linuxarm@openeuler.org
Subject: Re: [PATCH net-next v2 1/2] selftests/ptr_ring: add benchmark application for ptr_ring
Date: Sun, 27 Jun 2021 02:09:29 -0400 [thread overview]
Message-ID: <20210627020746-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <3ba4a6f1-2e1e-8c1a-6f47-5d182f05d1cd@huawei.com>
On Fri, Jun 25, 2021 at 11:52:16AM +0800, Yunsheng Lin wrote:
> On 2021/6/25 11:36, Jason Wang wrote:
> >
> > 在 2021/6/25 上午11:18, Yunsheng Lin 写道:
> >> Currently ptr_ring selftest is embedded within the virtio
> >> selftest, which involves some specific virtio operation,
> >> such as notifying and kicking.
> >>
> >> As ptr_ring has been used by various subsystems, it deserves
> >> it's owner's selftest in order to benchmark different usecase
> >> of ptr_ring, such as page pool and pfifo_fast qdisc.
> >>
> >> So add a simple application to benchmark ptr_ring performance.
> >> Currently two test mode is supported:
> >> Mode 0: Both enqueuing and dequeuing is done in a single thread,
> >> it is called simple test mode in the test app.
> >> Mode 1: Enqueuing and dequeuing is done in different thread
> >> concurrently, also known as SPSC(single-producer/
> >> single-consumer) test.
> >>
> >> The multi-producer/single-consumer test for pfifo_fast case is
> >> not added yet, which can be added if using CAS atomic operation
> >> to enable lockless multi-producer is proved to be better than
> >> using r->producer_lock.
> >>
> >> Only supported on x86 and arm64 for now.
> >>
> >> Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
> >> ---
> >> MAINTAINERS | 5 +
> >> tools/testing/selftests/ptr_ring/Makefile | 6 +
> >> tools/testing/selftests/ptr_ring/ptr_ring_test.c | 249 +++++++++++++++++++++++
> >> tools/testing/selftests/ptr_ring/ptr_ring_test.h | 150 ++++++++++++++
> >> 4 files changed, 410 insertions(+)
> >
> >
> > Why can't you simply reuse tools/virtio/ringtest?
>
> The main reason is stated in the commit log:
> "Currently ptr_ring selftest is embedded within the virtio
> selftest, which involves some specific virtio operation,
> such as notifying and kicking.
>
> As ptr_ring has been used by various subsystems, it deserves
> it's owner's selftest in order to benchmark different usecase
> of ptr_ring, such as page pool and pfifo_fast qdisc."
>
> More specificly in tools/virtio/ringtest/main.c and
> tools/virtio/ringtest/ptr_ring.c, there are a lot of operation
> related to virtio usecase, such as start_guest(), start_host(),
> poll_used(), notify() or kick() ....., so it makes more sense
> to add a generic selftest for ptr ring as it is not only used
> by virtio now.
Okay that answers why you didn't just run main.c
but why not add a new test under tools/virtio/ringtest/
reusing the rest of infrastructure that you currently copied?
>
> >
> > Thanks
> >
> >
> > .
> >
next prev parent reply other threads:[~2021-06-27 6:09 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-25 3:18 [PATCH net-next v2 0/2] add benchmark selftest and optimization for ptr_ring Yunsheng Lin
2021-06-25 3:18 ` [PATCH net-next v2 1/2] selftests/ptr_ring: add benchmark application " Yunsheng Lin
2021-06-25 3:36 ` Jason Wang
2021-06-25 3:52 ` Yunsheng Lin
2021-06-27 6:09 ` Michael S. Tsirkin [this message]
2021-06-28 1:42 ` Yunsheng Lin
2021-06-25 6:37 ` Michael S. Tsirkin
2021-06-25 7:40 ` Yunsheng Lin
2021-06-25 3:18 ` [PATCH net-next v2 2/2] ptr_ring: make __ptr_ring_empty() checking more reliable Yunsheng Lin
2021-06-25 6:32 ` Michael S. Tsirkin
2021-06-25 7:21 ` Yunsheng Lin
2021-06-25 7:30 ` Michael S. Tsirkin
2021-06-25 8:33 ` Yunsheng Lin
2021-06-27 6:03 ` Michael S. Tsirkin
2021-06-28 2:17 ` Yunsheng Lin
2021-06-25 6:39 ` Michael S. Tsirkin
2021-06-25 9:20 ` Yunsheng Lin
2021-06-27 6:07 ` Michael S. Tsirkin
2021-06-28 2:11 ` [Linuxarm] " Yunsheng Lin
2021-06-25 6:42 ` [PATCH net-next v2 0/2] add benchmark selftest and optimization for ptr_ring Michael S. Tsirkin
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