On Fri, Jul 22, 2022 at 02:23:13AM +, Zhao, Zhou wrote:
> 1 we need gcc machined options to tirgger gcc enable SIMD
> instructions(https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html).
> Or it will trigger a compile error. This is the reason why we
> change the config file.
Take a look at util
nt to save cpu time , we'd better check it
in compile time.
-Original Message-
From: Daniel P. Berrangé
Sent: Thursday, July 21, 2022 11:11 PM
To: Xu, Ling1
Cc: qemu-devel@nongnu.org; quint...@redhat.com; dgilb...@redhat.com; Zhao, Zhou
; Jin, Jun I
Subject: Re: [PATCH 1/1] Add AVX
On Thu, Jul 21, 2022 at 04:02:49PM +, Zhao, Zhou wrote:
> Hi dainel:
> Cause our code depend on intel intrinsics lib implement. And
> this lib depend on macro like " AVX512BW ". This macro need
> compile time check to enable some machine options . if you only
> use that utility to do runtime
t; From: Daniel P. Berrangé
> Sent: Thursday, July 21, 2022 11:11 PM
> To: Xu, Ling1
> Cc: qemu-devel@nongnu.org; quint...@redhat.com; dgilb...@redhat.com; Zhao,
> Zhou ; Jin, Jun I
> Subject: Re: [PATCH 1/1] Add AVX512 support for xbzrle_encode_buffer function
>
> On
On Thu, Jul 21, 2022 at 06:31:47PM +0800, ling xu wrote:
> This commit adds AVX512 implementation of xbzrle_encode_buffer function to
> accelerate xbzrle encoding speed. Compared with C version of
> xbzrle_encode_buffer function,
> AVX512 version can achieve almost 60%-70% performance improvement
