From: Shirley Ma <mashirle@us.ibm.com>
To: Avi Kivity <avi@redhat.com>, Arnd Bergmann <arnd@arndb.de>,
mst@redhat.com
Cc: xiaohui.xin@intel.com, netdev@vger.kernel.org,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [RFC PATCH 0/1] macvtap TX zero copy between guest and host kernel
Date: Mon, 13 Sep 2010 13:43:00 -0700 [thread overview]
Message-ID: <1284410580.13351.10.camel@localhost.localdomain> (raw)
This patch induces a new sock flag ZEROCOPY to avoid copy between
userspace and kernel. macvtap is the first user of zero copy between
guest and host kernel. It only uses when the lower device supports high
memory DMA. The first set of patch only addresses transmission TX side.
The test has shown big improvement on either CPU utilization reduction
or BW increase on 10GbE Intel NIC. Performance data will be submitted in
the coming email.
thanks
Shirley
next reply other threads:[~2010-09-13 20:43 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-13 20:43 Shirley Ma [this message]
2010-09-13 20:47 ` RFC PATCH 1/2] macvtap: A new sock zero copy flag Shirley Ma
2010-09-13 20:48 ` [RFC PATCH 2/2] macvtap: TX zero copy between guest and host kernel Shirley Ma
2010-09-14 3:17 ` David Miller
2010-09-14 9:12 ` Avi Kivity
2010-09-14 15:05 ` Shirley Ma
2010-09-14 15:21 ` Arnd Bergmann
2010-09-14 15:22 ` Michael S. Tsirkin
2010-09-14 16:00 ` Shirley Ma
2010-09-14 16:29 ` Michael S. Tsirkin
2010-09-14 17:02 ` Shirley Ma
2010-09-14 18:27 ` Michael S. Tsirkin
2010-09-14 18:49 ` Shirley Ma
2010-09-14 19:01 ` Michael S. Tsirkin
2010-09-14 19:20 ` Shirley Ma
2010-09-15 5:31 ` Michael S. Tsirkin
2010-09-14 19:36 ` Shirley Ma
2010-09-15 5:12 ` Michael S. Tsirkin
2010-09-15 6:21 ` Shirley Ma
2010-09-15 10:10 ` Michael S. Tsirkin
2010-09-15 14:52 ` Shirley Ma
2010-09-15 15:04 ` Michael S. Tsirkin
2010-09-15 15:39 ` Michael S. Tsirkin
2010-09-15 17:00 ` Shirley Ma
2010-09-15 17:30 ` Michael S. Tsirkin
2010-09-15 18:48 ` Shirley Ma
2010-09-29 3:24 ` Shirley Ma
2010-09-29 8:16 ` Michael S. Tsirkin
2010-09-29 8:28 ` Michael S. Tsirkin
2010-09-29 14:33 ` Shirley Ma
2010-09-29 14:56 ` Shirley Ma
2010-09-29 14:31 ` Shirley Ma
2010-09-29 14:37 ` Shirley Ma
2010-09-29 15:14 ` Michael S. Tsirkin
2010-09-29 15:23 ` Shirley Ma
2010-09-15 2:46 ` Xin, Xiaohui
2010-09-15 9:58 ` Michael S. Tsirkin
2010-09-16 8:18 ` Xin, Xiaohui
2010-09-16 10:02 ` Michael S. Tsirkin
2010-09-15 1:56 ` Xin, Xiaohui
2010-09-15 1:50 ` Xin, Xiaohui
2010-09-15 2:40 ` Shirley Ma
2010-09-15 2:55 ` Xin, Xiaohui
2010-09-15 5:27 ` Michael S. Tsirkin
2010-09-15 6:17 ` Shirley Ma
2010-09-14 12:05 ` [RFC PATCH 0/1] macvtap " Michael S. Tsirkin
2010-09-14 15:15 ` Shirley Ma
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