From: Amit Shah <amit.shah@redhat.com>
To: Liang Li <liang.z.li@intel.com>
Cc: yang.z.zhang@intel.com, pbonzini@redhat.com,
qemu-devel@nongnu.org,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
quintela@redhat.com
Subject: Re: [Qemu-devel] [PATCH 0/2] Optimization with AVX2 instruction
Date: Wed, 2 Sep 2015 11:10:09 +0530 [thread overview]
Message-ID: <20150902054009.GF13778@grmbl.mre> (raw)
In-Reply-To: <1440752053-16961-1-git-send-email-liang.z.li@intel.com>
On (Fri) 28 Aug 2015 [16:54:11], Liang Li wrote:
> The buffer_find_nonzero_offset() will be called to check the zero page
> during live migration, it's a hot function. buffer_find_nonzero_offset()
> has already been optimized with SSE2 instructions, for platform that
> supports AVX2, we can optimize this function with AVX2 instructions and
> achieve about 25% performance gain.
This should be a good improvement. I recall Dave and I had a chat
about this in the past too.
I've not yet reviewed the patchset, but I doubt anyone will have
objections. I'll review this shortly.
Thanks,
Amit
next prev parent reply other threads:[~2015-09-02 5:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-28 8:54 [Qemu-devel] [PATCH 0/2] Optimization with AVX2 instruction Liang Li
2015-08-28 8:54 ` [Qemu-devel] [PATCH 1/2] cutils: add the AVX2 optimization Liang Li
2015-08-28 8:54 ` [Qemu-devel] [PATCH 2/2] configure: add --enable-avx2 option Liang Li
2015-09-02 5:40 ` Amit Shah [this message]
2015-09-06 14:43 ` [Qemu-devel] [PATCH 0/2] Optimization with AVX2 instruction Paolo Bonzini
2015-09-08 6:16 ` Li, Liang Z
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