From: Paolo Bonzini <pbonzini@redhat.com>
To: Peter Lieven <pl@kamp.de>
Cc: Stefan Hajnoczi <stefanha@gmail.com>,
Orit Wasserman <owasserm@redhat.com>,
qemu-devel@nongnu.org, quintela@redhat.com
Subject: Re: [Qemu-devel] [PATCHv4 0/9] buffer_is_zero / migration optimizations
Date: Tue, 26 Mar 2013 10:20:34 +0100 [thread overview]
Message-ID: <51516862.5060906@redhat.com> (raw)
In-Reply-To: <F01A8B40-2F39-4FB7-976D-1E385F0AE0A2@kamp.de>
Il 26/03/2013 09:14, Peter Lieven ha scritto:
> If noone objects I would use is_zero_page_2 and continue with v5 of
> the patch set. As I am ooo for the next 8 days from tomorrow. i
> prefer v3 as it has better performance if the non-zeroness is within
> the 8*sizeof(VECTYPE) bytes and not in the first 256-bit.
Either v2 or v3 is fine. v3 has slightly simpler code and v2 optimizes
for a rare case, but v2 is indeed a bit faster and your benchmarking
effort should be rewarded. :)
> Paolo, with the version that has lower setup costs in mind shall I
> use the vectorized or the unrolled version of patch 4 (find_next_bit
> optimization)?
I think for that we should, at least for now, use the version we
discussed a few weeks ago (with no SIMD and just unrolling).
Paolo
prev parent reply other threads:[~2013-03-26 9:20 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
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 [this message]
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