From: Avi Kivity <avi@redhat.com>
To: Orit Wasserman <owasserm@redhat.com>
Cc: quintela@redhat.com, stefanha@gmail.com, qemu-devel@nongnu.org,
blauwirbel@gmail.com, Petter Svard <petters@cs.umu.se>,
Benoit Hudzia <benoit.hudzia@sap.com>,
Aidan Shribman <aidan.shribman@sap.com>
Subject: Re: [Qemu-devel] [PATCH v6 00/11] XBRLE delta for live migration of large memory app
Date: Wed, 25 Jan 2012 13:53:00 +0200 [thread overview]
Message-ID: <4F1FED1C.3000705@redhat.com> (raw)
In-Reply-To: <1327490809-21393-1-git-send-email-owasserm@redhat.com>
On 01/25/2012 01:26 PM, Orit Wasserman wrote:
> The run length is encoded using ULEB128 (http://en.wikipedia.org/wiki/LEB128)
>
> page = zrun
> | zrun nzrun
> | zrun nzrun page
>
> zrun = length
>
> nzrun = length byte...
>
> length = uleb128 encoded integer
>
We can improve this by a further 2 bytes per page by not encoding the
trailing zero run:
page = zrun nzrun
| zrun nzrun page
so, a page containing
{ 10*0, 7, 4085*0 }
would be encoded as
0x10 0x01 0x07
without the trailing 4085 zrun. This works because you no longer send
unchanged pages.
--
error compiling committee.c: too many arguments to function
prev parent reply other threads:[~2012-01-25 11:53 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-25 11:26 [Qemu-devel] [PATCH v6 00/11] XBRLE delta for live migration of large memory app Orit Wasserman
2012-01-25 11:26 ` [Qemu-devel] [PATCH v6 01/11] Add cache handling functions Orit Wasserman
2012-01-25 11:26 ` [Qemu-devel] [PATCH v6 02/11] Add uleb encoding/decoding functions Orit Wasserman
2012-01-25 11:48 ` Avi Kivity
2012-01-25 12:22 ` Orit Wasserman
2012-01-25 12:27 ` Orit Wasserman
2012-01-25 11:26 ` [Qemu-devel] [PATCH v6 03/11] Add save_block_hdr function Orit Wasserman
2012-01-25 11:26 ` [Qemu-devel] [PATCH v6 04/11] Add host_from_stream_offset_versioned function Orit Wasserman
2012-01-25 11:26 ` [Qemu-devel] [PATCH v6 05/11] Add XBZRLE to ram_save_block and ram_save_live Orit Wasserman
2012-01-25 11:26 ` [Qemu-devel] [PATCH v6 06/11] Add MigrationParams structure Orit Wasserman
2012-01-25 11:26 ` [Qemu-devel] [PATCH v6 07/11] Add XBZRLE parameters to MigrationState Orit Wasserman
2012-01-25 11:26 ` [Qemu-devel] [PATCH v6 08/11] Add migration capabilties Orit Wasserman
2012-01-25 11:26 ` [Qemu-devel] [PATCH v6 09/11] Add set_cachesize command Orit Wasserman
2012-01-25 11:26 ` [Qemu-devel] [PATCH v6 10/11] Add XBZRLE option to migrate command Orit Wasserman
2012-01-25 11:26 ` [Qemu-devel] [PATCH v6 11/11] Add XBZRLE statstics information Orit Wasserman
2012-01-25 11:53 ` Avi Kivity [this message]
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