From: Shirley Ma <mashirle@us.ibm.com>
To: Avi Kivity <avi@redhat.com>
Cc: xiaohui.xin@intel.com, netdev@vger.kernel.org,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
mst@redhat.com, mingo@elte.hu, davem@davemloft.net,
herbert@gondor.hengli.com.au, jdike@linux.intel.com
Subject: Re: [RFC PATCH v8 00/16] Provide a zero-copy method on KVM virtio-net.
Date: Tue, 10 Aug 2010 20:28:02 -0700 [thread overview]
Message-ID: <1281497282.3391.31.camel@localhost.localdomain> (raw)
In-Reply-To: <4C56F318.7030409@redhat.com>
Hello Avi,
On Mon, 2010-08-02 at 19:32 +0300, Avi Kivity wrote:
> When are you seeing gup_fast() fall back to gup()? It should be at
> most
> once per page (when a guest starts up none of its pages are mapped,
> it
> faults them in on demand).
netperf/netserver latency results are pretty good for message size
between 1 bytes and 512 bytes when I have 64 bytes small copy.
However if I don't have any small copy , the ping RTT time is
unreasonable huge. Since we think it's better to have small message with
copy, so there will be no issue.
Thanks
Shirley
next prev parent reply other threads:[~2010-08-11 3:28 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-29 11:14 [RFC PATCH v8 00/16] Provide a zero-copy method on KVM virtio-net xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 01/16] Add a new structure for skb buffer from external xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 02/16] Add a new struct for device to manipulate external buffer xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 03/16] Add a ndo_mp_port_prep func to net_device_ops xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 04/16] Add a function make external buffer owner to query capability xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 05/16] Add a function to indicate if device use external buffer xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 06/16] Use callback to deal with skb_release_data() specially xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 07/16] Modify netdev_alloc_page() to get external buffer xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 08/16] Modify netdev_free_page() to release " xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 09/16] Don't do skb recycle, if device use " xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 10/16] Add a hook to intercept external buffers from NIC driver xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 11/16] Add header file for mp device xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 13/16] Add a kconfig entry and make entry " xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 12/16] Add mp(mediate passthru) device xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 14/16] Provides multiple submits and asynchronous notifications xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 15/16] An example how to modifiy NIC driver to use napi_gro_frags() interface xiaohui.xin
2010-07-29 11:14 ` [RFC PATCH v8 16/16] An example how to alloc user buffer based on " xiaohui.xin
2010-07-29 22:31 ` [RFC PATCH v8 00/16] Provide a zero-copy method on KVM virtio-net Shirley Ma
2010-07-30 5:02 ` Avi Kivity
2010-07-30 15:46 ` Shirley Ma
2010-08-01 8:18 ` Avi Kivity
2010-08-02 16:01 ` Shirley Ma
2010-08-02 16:11 ` Avi Kivity
2010-08-02 16:25 ` Shirley Ma
2010-08-02 16:32 ` Avi Kivity
2010-08-11 3:28 ` Shirley Ma [this message]
2010-07-30 8:53 ` Xin, Xiaohui
2010-07-30 15:51 ` Shirley Ma
2010-07-31 9:30 ` Arnd Bergmann
2010-08-04 2:06 ` Dong, Eddie
2010-08-04 8:56 ` Arnd Bergmann
2010-08-04 17:09 ` Shirley Ma
2010-08-01 8:31 ` Michael S. Tsirkin
2010-08-02 16:04 ` Shirley Ma
2010-08-02 16:10 ` Shirley Ma
2010-08-03 8:48 ` Xin, Xiaohui
2010-08-03 15:50 ` Shirley Ma
2010-08-05 8:52 ` Xin, Xiaohui
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