From: Robert Hoo <robert.hu@linux.intel.com>
To: qemu-devel@nongnu.org, pbonzini@redhat.com,
richard.henderson@linaro.org, laurent@vivier.eu,
philmd@redhat.com, berrange@redhat.com
Cc: robert.hu@intel.com, chao.p.peng@intel.com,
Robert Hoo <robert.hu@linux.intel.com>
Subject: [PATCH v2 0/2] Add AVX512F optimization option and buffer_zero_avx512()
Date: Wed, 26 Feb 2020 11:35:40 +0800 [thread overview]
Message-ID: <1582688142-113997-1-git-send-email-robert.hu@linux.intel.com> (raw)
1) Introduce {enable,disable}-avx512f configure option
2) Implement new buffer_zero_avx512() with AVX512F instructions
Changes in v2:
1. Fixes wrong definition of CACHE_SSE2 in v1.
2. Fixes not handle <256 length case in buffer_zero_avx512() implementaion.
(Follow Richard's suggestion: handle the case in select_accel_fn(), and have a
global variable alongside buffer_accel)
3. Changes avx512f configuration option's default status to disabled.
4. Ran 'make check-unit' on this patch, on both a Ivybridge machine and a
CascadeLake machine.
Robert Hoo (2):
configure: add configure option avx512f_opt
util: add util function buffer_zero_avx512()
configure | 41 +++++++++++++++++++++++++++++++++
include/qemu/cpuid.h | 3 +++
util/bufferiszero.c | 64 ++++++++++++++++++++++++++++++++++++++++++++--------
3 files changed, 99 insertions(+), 9 deletions(-)
--
1.8.3.1
next reply other threads:[~2020-02-26 3:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-26 3:35 Robert Hoo [this message]
2020-02-26 3:35 ` [PATCH v2 1/2] configure: introduce configure option avx512f Robert Hoo
2020-02-26 3:35 ` [PATCH v2 2/2] util: add util function buffer_zero_avx512() Robert Hoo
2020-02-27 13:23 ` Richard Henderson
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