From: Eric Blake <eblake@redhat.com>
To: Richard Henderson <rth@twiddle.net>, qemu-devel@nongnu.org
Cc: pbonzini@redhat.com, peter.maydell@linaro.org
Subject: Re: [Qemu-devel] [PATCH v2 0/8] Improve buffer_is_zero
Date: Wed, 24 Aug 2016 14:18:51 -0500 [thread overview]
Message-ID: <57BDF31B.3000200@redhat.com> (raw)
In-Reply-To: <1472060915-6011-1-git-send-email-rth@twiddle.net>
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On 08/24/2016 12:48 PM, Richard Henderson wrote:
> Patches 1-4 remove the use of ifunc from the implementation.
>
> Patch 6 adjusts the x86 implementation a bit more to take
> advantage of ptest (in sse4.1) and unaligned accesses (in avx1).
Do we really care about unaligned access? Or can we guarantee that all
our calls to buffer_is_zero are already aligned, and make optimizations
along those lines?
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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next prev parent reply other threads:[~2016-08-24 19:18 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-24 17:48 [Qemu-devel] [PATCH v2 0/8] Improve buffer_is_zero Richard Henderson
2016-08-24 17:48 ` [Qemu-devel] [PATCH v2 1/8] cutils: Move buffer_is_zero and subroutines to a new file Richard Henderson
2016-08-24 17:48 ` [Qemu-devel] [PATCH v2 3/8] cutils: Export only buffer_is_zero Richard Henderson
2016-08-24 17:48 ` [Qemu-devel] [PATCH v2 4/8] cutils: Rearrange buffer_is_zero acceleration Richard Henderson
2016-08-24 17:48 ` [Qemu-devel] [PATCH v2 5/8] cutils: Add generic prefetch Richard Henderson
2016-08-24 17:48 ` [Qemu-devel] [PATCH v2 6/8] cutils: Rewrite x86 buffer zero checking Richard Henderson
2016-08-24 17:48 ` [Qemu-devel] [PATCH v2 7/8] cutils: Rewrite aarch64 " Richard Henderson
2016-08-24 17:48 ` Richard Henderson
2016-08-24 17:48 ` [Qemu-devel] [PATCH v2 8/8] cutils: Rewrite ppc " Richard Henderson
2016-08-24 19:18 ` Eric Blake [this message]
2016-08-24 20:31 ` [Qemu-devel] [PATCH v2 0/8] Improve buffer_is_zero Richard Henderson
2016-08-25 12:49 ` Daniel P. Berrange
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