From patchwork Sat Feb 29 12:34:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robert Hoo X-Patchwork-Id: 1247067 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 48V5Tt3DpTz9sRl for ; Sat, 29 Feb 2020 23:35:28 +1100 (AEDT) Received: from localhost ([::1]:60090 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j81L3-0004ek-0E for incoming@patchwork.ozlabs.org; Sat, 29 Feb 2020 07:35:25 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:59153) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j81KW-0004eN-Sr for qemu-devel@nongnu.org; Sat, 29 Feb 2020 07:34:53 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1j81KV-00080Y-QQ for qemu-devel@nongnu.org; Sat, 29 Feb 2020 07:34:52 -0500 Received: from mga17.intel.com ([192.55.52.151]:29706) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1j81KV-0007yM-Ii for qemu-devel@nongnu.org; Sat, 29 Feb 2020 07:34:51 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Feb 2020 04:34:48 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,499,1574150400"; d="scan'208";a="242654289" Received: from sqa-gate.sh.intel.com (HELO robert-ivt.tsp.org) ([10.239.48.212]) by orsmga006.jf.intel.com with ESMTP; 29 Feb 2020 04:34:45 -0800 From: Robert Hoo To: qemu-devel@nongnu.org, pbonzini@redhat.com, richard.henderson@linaro.org, laurent@vivier.eu, philmd@redhat.com, berrange@redhat.com Subject: [PATCH v4 0/2] Add AVX512F optimization option and buffer_zero_avx512() Date: Sat, 29 Feb 2020 20:34:33 +0800 Message-Id: <1582979675-22550-1-git-send-email-robert.hu@linux.intel.com> X-Mailer: git-send-email 1.8.3.1 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.151 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: robert.hu@intel.com, chao.p.peng@intel.com, Robert Hoo Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" 1) Introduce {enable,disable}-avx512f configure option 2) Implement new buffer_zero_avx512() with AVX512F instructions Changes in v4: In init_cpuid_cache(), stringently test AVX512F OS level enablement. Changes in v3: In init_accel(), init length_to_accel value in every accel case, because in unit test, it will be invoked several times with different accel cases. (Thanks Richard's careful review) 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 | 74 +++++++++++++++++++++++++++++++++++++++++++++------- 3 files changed, 108 insertions(+), 10 deletions(-)