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From: Yuanhan Liu <yuanhan.liu@linux.intel.com>
To: Maxime Coquelin <maxime.coquelin@redhat.com>
Cc: huawei.xie@intel.com, dev@dpdk.org, vkaplans@redhat.com,
	mst@redhat.com, stephen@networkplumber.org
Subject: Re: [PATCH v4] vhost: Add indirect descriptors support to the TX path
Date: Tue, 27 Sep 2016 20:18:38 +0800	[thread overview]
Message-ID: <20160927121838.GO25823@yliu-dev.sh.intel.com> (raw)
In-Reply-To: <1474965769-24782-1-git-send-email-maxime.coquelin@redhat.com>

On Tue, Sep 27, 2016 at 10:42:49AM +0200, Maxime Coquelin wrote:
> Indirect descriptors are usually supported by virtio-net devices,
> allowing to dispatch a larger number of requests.
> 
> When the virtio device sends a packet using indirect descriptors,
> only one slot is used in the ring, even for large packets.
> 
> The main effect is to improve the 0% packet loss benchmark.
> A PVP benchmark using Moongen (64 bytes) on the TE, and testpmd
> (fwd io for host, macswap for VM) on DUT shows a +50% gain for
> zero loss.
> 
> On the downside, micro-benchmark using testpmd txonly in VM and
> rxonly on host shows a loss between 1 and 4%.i But depending on
> the needs, feature can be disabled at VM boot time by passing
> indirect_desc=off argument to vhost-user device in Qemu.
> 
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>

Applied to dpdk-next-virtio.

Thanks.

	--yliu

  reply	other threads:[~2016-09-27 12:18 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-23  8:28 [PATCH v3] vhost: Add indirect descriptors support to the TX path Maxime Coquelin
2016-09-23 15:49 ` Michael S. Tsirkin
2016-09-23 18:02   ` Maxime Coquelin
2016-09-23 18:06     ` Michael S. Tsirkin
2016-09-23 18:16       ` Maxime Coquelin
2016-09-23 18:22         ` Michael S. Tsirkin
2016-09-23 20:24           ` Stephen Hemminger
2016-09-26  3:03             ` Yuanhan Liu
2016-09-26 12:25               ` Michael S. Tsirkin
2016-09-26 13:04                 ` Yuanhan Liu
2016-09-27  4:15 ` Yuanhan Liu
2016-09-27  7:25   ` Maxime Coquelin
2016-09-27  8:42 ` [PATCH v4] " Maxime Coquelin
2016-09-27 12:18   ` Yuanhan Liu [this message]
2016-10-14  7:24   ` Wang, Zhihong
2016-10-14  7:34     ` Wang, Zhihong
2016-10-14 15:50     ` Maxime Coquelin
2016-10-17 11:23       ` Maxime Coquelin
2016-10-17 13:21         ` Yuanhan Liu
2016-10-17 14:14           ` Maxime Coquelin
2016-10-27  9:00             ` Wang, Zhihong
2016-10-27  9:10               ` Maxime Coquelin
2016-10-27  9:55                 ` Maxime Coquelin
2016-10-27 10:19                   ` Wang, Zhihong
2016-10-28  7:32                     ` Pierre Pfister (ppfister)
2016-10-28  7:58                       ` Maxime Coquelin
2016-11-01  8:15                         ` Yuanhan Liu
2016-11-01  9:39                           ` Thomas Monjalon
2016-11-02  2:44                             ` Yuanhan Liu
2016-10-27 10:33                 ` Yuanhan Liu
2016-10-27 10:35                   ` Maxime Coquelin
2016-10-27 10:46                     ` Yuanhan Liu
2016-10-28  0:49                       ` Wang, Zhihong
2016-10-28  7:42                         ` Maxime Coquelin
2016-10-31 10:01                           ` Wang, Zhihong
2016-11-02 10:51                             ` Maxime Coquelin
2016-11-03  8:11                               ` Maxime Coquelin
2016-11-04  6:18                                 ` Xu, Qian Q
2016-11-04  7:41                                   ` Maxime Coquelin
2016-11-04  7:20                                 ` Wang, Zhihong
2016-11-04  7:57                                   ` Maxime Coquelin
2016-11-04  7:59                                     ` Maxime Coquelin
2016-11-04 10:43                                       ` Wang, Zhihong
2016-11-04 11:22                                         ` Maxime Coquelin
2016-11-04 11:36                                           ` Yuanhan Liu
2016-11-04 11:39                                             ` Maxime Coquelin
2016-11-04 12:30                                           ` Wang, Zhihong
2016-11-04 12:54                                             ` Maxime Coquelin
2016-11-04 13:09                                               ` Wang, Zhihong
2016-11-08 10:51                                                 ` Wang, Zhihong
2016-10-27 10:53                   ` Maxime Coquelin
2016-10-28  6:05                     ` Xu, Qian Q

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