From: Paolo Bonzini <pbonzini@redhat.com>
To: Peter Lieven <pl@kamp.de>
Cc: Orit Wasserman <owasserm@redhat.com>,
quintela@redhat.com, qemu-devel@nongnu.org,
Stefan Hajnoczi <stefanha@gmail.com>
Subject: Re: [Qemu-devel] [PATCHv4 0/9] buffer_is_zero / migration optimizations
Date: Mon, 25 Mar 2013 06:53:19 -0400 (EDT) [thread overview]
Message-ID: <1328150503.13028038.1364208799172.JavaMail.root@redhat.com> (raw)
In-Reply-To: <5150242B.4090605@kamp.de>
> ubuntu 12.04 LTS 64-bit desktop with 1G memory shortly after boot:
> histogram: 31.7% 32.9% [...] 36.4% 100.0%
>
> ---
>
> opensuse 11.1 64-bit with 24GB ram (busy server)
> histogram: 97.5% 97.9% [...] 99.5% 100.0%
>
> ---
>
> windows server 2008 R2 with 8G ram running for 3 days:
> histogram: 20.9% 21.3% [...] 22.5% 100.0%
>
> ---
>
> windows XP guest with 1G Ram running for approx. 1 hours
> histogram: 25.6% [...] 35.8% 100.0%
Doesn't this suggest checking the first _and the last_ word,
and using the vectorized loop if none is zero?
Paolo
next prev parent reply other threads:[~2013-03-25 10:53 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-22 12:46 [Qemu-devel] [PATCHv4 0/9] buffer_is_zero / migration optimizations Peter Lieven
2013-03-22 12:46 ` [Qemu-devel] [PATCHv4 1/9] move vector definitions to qemu-common.h Peter Lieven
2013-03-25 8:35 ` Orit Wasserman
2013-03-22 12:46 ` [Qemu-devel] [PATCHv4 2/9] cutils: add a function to find non-zero content in a buffer Peter Lieven
2013-03-22 19:37 ` Eric Blake
2013-03-22 20:03 ` Peter Lieven
2013-03-22 20:22 ` [Qemu-devel] indentation hints [was: [PATCHv4 2/9] cutils: add a function to find non-zero content in a buffer] Eric Blake
2013-03-23 11:18 ` Peter Maydell
2013-03-25 8:53 ` [Qemu-devel] [PATCHv4 2/9] cutils: add a function to find non-zero content in a buffer Orit Wasserman
2013-03-25 8:56 ` Peter Lieven
2013-03-25 9:26 ` Orit Wasserman
2013-03-25 9:42 ` Paolo Bonzini
2013-03-25 10:03 ` Orit Wasserman
2013-03-22 12:46 ` [Qemu-devel] [PATCHv4 3/9] buffer_is_zero: use vector optimizations if possible Peter Lieven
2013-03-25 8:53 ` Orit Wasserman
2013-03-22 12:46 ` [Qemu-devel] [PATCHv4 4/9] bitops: use vector algorithm to optimize find_next_bit() Peter Lieven
2013-03-25 9:04 ` Orit Wasserman
2013-03-22 12:46 ` [Qemu-devel] [PATCHv4 5/9] migration: search for zero instead of dup pages Peter Lieven
2013-03-22 19:49 ` Eric Blake
2013-03-22 20:02 ` Peter Lieven
2013-03-25 9:30 ` Orit Wasserman
2013-03-22 12:46 ` [Qemu-devel] [PATCHv4 6/9] migration: add an indicator for bulk state of ram migration Peter Lieven
2013-03-25 9:32 ` Orit Wasserman
2013-03-22 12:46 ` [Qemu-devel] [PATCHv4 7/9] migration: do not sent zero pages in bulk stage Peter Lieven
2013-03-22 20:13 ` Eric Blake
2013-03-25 9:44 ` Orit Wasserman
2013-03-22 12:46 ` [Qemu-devel] [PATCHv4 8/9] migration: do not search dirty " Peter Lieven
2013-03-25 10:05 ` Orit Wasserman
2013-03-22 12:46 ` [Qemu-devel] [PATCHv4 9/9] migration: use XBZRLE only after " Peter Lieven
2013-03-25 10:16 ` Orit Wasserman
2013-03-22 17:25 ` [Qemu-devel] [PATCHv4 0/9] buffer_is_zero / migration optimizations Paolo Bonzini
2013-03-22 19:20 ` Peter Lieven
2013-03-22 21:24 ` Paolo Bonzini
2013-03-23 7:34 ` Peter Lieven
2013-03-25 10:17 ` Peter Lieven
2013-03-25 10:53 ` Paolo Bonzini [this message]
2013-03-25 11:26 ` Peter Lieven
2013-03-25 13:02 ` Paolo Bonzini
2013-03-25 13:23 ` Peter Lieven
2013-03-25 13:32 ` Peter Lieven
2013-03-25 14:34 ` Paolo Bonzini
2013-03-25 21:37 ` Peter Lieven
2013-03-26 8:14 ` Peter Lieven
2013-03-26 9:20 ` Paolo Bonzini
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