From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=134.134.136.20; helo=mga02.intel.com; envelope-from=eric.dong@intel.com; receiver=edk2-devel@lists.01.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id AEF5A202E5446 for ; Wed, 11 Jul 2018 04:07:33 -0700 (PDT) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Jul 2018 04:07:32 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,338,1526367600"; d="scan'208";a="71848937" Received: from ydong10-win10.ccr.corp.intel.com ([10.239.9.24]) by orsmga001.jf.intel.com with ESMTP; 11 Jul 2018 04:07:31 -0700 From: Eric Dong To: edk2-devel@lists.01.org Date: Wed, 11 Jul 2018 19:07:26 +0800 Message-Id: <20180711110729.12604-1-eric.dong@intel.com> X-Mailer: git-send-email 2.15.0.windows.1 Subject: [Patch 0/3] Optimize load uCode performance X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Jul 2018 11:07:33 -0000 Use below three rules to optimize load uCode performance: 1. Let BSP relocate uCode from flash to memory for better performance. 2. BSP caches the CPU ID and address of uCode so AP doesn’t need to look for the uCode again if the CPU ID is same as BSP’s. 3. Only apply uCode in one thread of a core when hyper threading is enabled. Test: Use an sample platform which has 1 socket, 4 core, 8 threads, the CpuMpPei driver cost time reduce from 108.4ms to 27.2ms Eric Dong (3): UefiCpuPkg/MpInitLib: Relocate uCode to memory to save time. UefiCpuPkg/MpInitLib: Use BSP uCode for APs if possible. UefiCpuPkg/MpInitLib: Load uCode once for one core. UefiCpuPkg/Library/MpInitLib/Microcode.c | 43 +++++++++++++++++++++++++++++--- UefiCpuPkg/Library/MpInitLib/MpLib.c | 17 ++++++++++--- UefiCpuPkg/Library/MpInitLib/MpLib.h | 11 ++++++-- 3 files changed, 63 insertions(+), 8 deletions(-) -- 2.15.0.windows.1