From: "Xia, Chenbo" <chenbo.xia@intel.com>
To: Maxime Coquelin <maxime.coquelin@redhat.com>,
"dev@dpdk.org" <dev@dpdk.org>,
"amorenoz@redhat.com" <amorenoz@redhat.com>,
"david.marchand@redhat.com" <david.marchand@redhat.com>,
"olivier.matz@6wind.com" <olivier.matz@6wind.com>,
"bnemeth@redhat.com" <bnemeth@redhat.com>
Subject: Re: [dpdk-dev] [PATCH v4 0/3] vhost: make virtqueue cache-friendly
Date: Wed, 31 Mar 2021 06:04:23 +0000 [thread overview]
Message-ID: <MN2PR11MB40632E786259E6B9FFC2CD549C7C9@MN2PR11MB4063.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20210323090219.126712-1-maxime.coquelin@redhat.com>
> -----Original Message-----
> From: Maxime Coquelin <maxime.coquelin@redhat.com>
> Sent: Tuesday, March 23, 2021 5:02 PM
> To: dev@dpdk.org; Xia, Chenbo <chenbo.xia@intel.com>; amorenoz@redhat.com;
> david.marchand@redhat.com; olivier.matz@6wind.com; bnemeth@redhat.com
> Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
> Subject: [PATCH v4 0/3] vhost: make virtqueue cache-friendly
>
> As done for Virtio PMD, this series improves cache utilization
> of the vhost_virtqueue struct by removing unused field,
> make the live-migration cache dynamically allocated at
> live-migration setup time and by moving fields
> around so that hot fields are on the first cachelines.
>
> With this series, The struct vhost_virtqueue size goes
> from 832B (13 cachelines) down to 320B (5 cachelines).
>
> With this series and the virtio one, I measure a gain
> of up to 8% in IO loop micro-benchmark with packed
> ring, and 5% with split ring.
>
> I don't have a setup at hand to run PVP testing, but
> it might be interresting to get the numbers as I
> suspect the cache pressure is higher in this test as
> in real use-cases.
>
> Maxime Coquelin (3):
> vhost: remove unused Vhost virtqueue field
> vhost: move dirty logging cache out of the virtqueue
> vhost: optimize vhost virtqueue struct
>
> lib/librte_vhost/vhost.c | 21 +++++++++----
> lib/librte_vhost/vhost.h | 56 +++++++++++++++++------------------
> lib/librte_vhost/vhost_user.c | 44 +++++++++++++++++++--------
> lib/librte_vhost/virtio_net.c | 12 ++++----
> 4 files changed, 82 insertions(+), 51 deletions(-)
>
> --
> 2.30.2
Series applied to next-virtio/main, Thanks!
prev parent reply other threads:[~2021-03-31 6:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-23 9:02 Maxime Coquelin
2021-03-23 9:02 ` [dpdk-dev] [PATCH v4 1/3] vhost: remove unused Vhost virtqueue field Maxime Coquelin
2021-03-23 9:02 ` [dpdk-dev] [PATCH v4 2/3] vhost: move dirty logging cache out of the virtqueue Maxime Coquelin
2021-03-23 9:02 ` [dpdk-dev] [PATCH v4 3/3] vhost: optimize vhost virtqueue struct Maxime Coquelin
2021-03-25 2:30 ` Xia, Chenbo
2021-03-23 10:30 ` [dpdk-dev] [PATCH v4 0/3] vhost: make virtqueue cache-friendly David Marchand
2021-03-29 10:52 ` Balazs Nemeth
2021-03-31 6:04 ` Xia, Chenbo [this message]
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