From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: dev@dpdk.org, i.maximets@samsung.com, tiwei.bie@intel.com,
zhihong.wang@intel.com, jasowang@redhat.com, mst@redhat.com
Cc: stable@dpdk.org
Subject: Re: [dpdk-stable] [PATCH v2 0/4] vhost: add missing barriers, move prefetching
Date: Thu, 20 Dec 2018 19:19:49 +0100 [thread overview]
Message-ID: <8df01d5a-af91-0dd0-a804-31480ad810c9@redhat.com> (raw)
In-Reply-To: <20181219082113.24455-1-maxime.coquelin@redhat.com>
On 12/19/18 9:21 AM, Maxime Coquelin wrote:
> This series adds missing read barriers after reading avail index
> for split ring and desc flags for packed ring.
>
> Also, it turns out that some descriptors prefetching are either
> badly placed, or useless, last part of the series fixes that.
>
> With the series applied, I get between 0 and 4% gain depending
> on the benchmark (testpmd txonly/rxonly/io).
>
> Thanks to Jason for reporting the missing read barriers.
>
> Changes since v1:
> =================
> - Drop volatile removal patch (Ilya)
> - Improve commit messages for RMB patches (Ilya)
>
> Maxime Coquelin (4):
> vhost: enforce avail index and desc read ordering
> vhost: enforce desc flags and content read ordering
> vhost: prefetch descriptor after the read barrier
> vhost: remove useless prefetch for packed ring descriptor
>
> lib/librte_vhost/virtio_net.c | 27 ++++++++++++++++++++++-----
> 1 file changed, 22 insertions(+), 5 deletions(-)
>
Applied to dpdk-next-virtio.
Maxime
prev parent reply other threads:[~2018-12-20 18:19 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-19 8:21 Maxime Coquelin
2018-12-19 8:21 ` [dpdk-stable] [PATCH v2 1/4] vhost: enforce avail index and desc read ordering Maxime Coquelin
2018-12-19 15:47 ` Michael S. Tsirkin
2018-12-19 15:50 ` Maxime Coquelin
2018-12-19 8:21 ` [dpdk-stable] [PATCH v2 2/4] vhost: enforce desc flags and content " Maxime Coquelin
2018-12-19 8:21 ` [dpdk-stable] [PATCH v2 3/4] vhost: prefetch descriptor after the read barrier Maxime Coquelin
2018-12-19 8:21 ` [dpdk-stable] [PATCH v2 4/4] vhost: remove useless prefetch for packed ring descriptor Maxime Coquelin
2018-12-19 15:49 ` Michael S. Tsirkin
2018-12-19 15:50 ` [dpdk-stable] [PATCH v2 0/4] vhost: add missing barriers, move prefetching Michael S. Tsirkin
2018-12-19 16:28 ` Ilya Maximets
2018-12-20 4:39 ` Tiwei Bie
2018-12-20 18:19 ` Maxime Coquelin [this message]
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