From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8E935C43218 for ; Fri, 26 Apr 2019 14:37:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 604D62077B for ; Fri, 26 Apr 2019 14:37:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726253AbfDZOhv (ORCPT ); Fri, 26 Apr 2019 10:37:51 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:43062 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726060AbfDZOhu (ORCPT ); Fri, 26 Apr 2019 10:37:50 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 71E1E80D; Fri, 26 Apr 2019 07:37:50 -0700 (PDT) Received: from e108454-lin.cambridge.arm.com (e108454-lin.cambridge.arm.com [10.1.196.50]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4779F3F5C1; Fri, 26 Apr 2019 07:37:48 -0700 (PDT) From: Julien Grall To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: catalin.marinas@arm.com, will.deacon@arm.com, christoffer.dall@arm.com, marc.zyngier@arm.com, james.morse@arm.com, julien.thierry@arm.com, suzuki.poulose@arm.com, Dave.Martin@arm.com, ard.biesheuvel@linaro.org, Julien Grall Subject: [PATCH v4 0/3] arm64/fpsimd: Don't disable softirq when touching FPSIMD/SVE state Date: Fri, 26 Apr 2019 15:37:37 +0100 Message-Id: <20190426143740.31973-1-julien.grall@arm.com> X-Mailer: git-send-email 2.11.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, This patch series keeps softirqs enabled while touching FPSIMD/SVE state. For more details on the impact see patch #3. This patch series has been benchmarked on Linux 5.1-rc4 with defconfig. On Juno2: * hackbench 100 process 1000 (10 times) * .7% quicker On ThunderX 2: * hackbench 1000 process 1000 (20 times) * 3.4% quicker Note that while the benchmark has been done on 5.1-rc4, the patch series is based on kvm-arm/next as it has few conflicts with the SVE KVM series. Cheers, Julien Grall (3): arm64/fpsimd: Remove the prototype for sve_flush_cpu_state() arch/arm64: fpsimd: Introduce fpsimd_save_and_flush_cpu_state() and use it arm64/fpsimd: Don't disable softirq when touching FPSIMD/SVE state arch/arm64/include/asm/fpsimd.h | 5 +- arch/arm64/include/asm/simd.h | 10 +-- arch/arm64/kernel/fpsimd.c | 139 +++++++++++++++++++++++++++------------- arch/arm64/kvm/fpsimd.c | 4 +- 4 files changed, 103 insertions(+), 55 deletions(-) -- 2.11.0