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=-1.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED 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 7C5EBC04E53 for ; Wed, 15 May 2019 11:02:52 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 50BEB216FD for ; Wed, 15 May 2019 11:02:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="j8nR5h5K" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 50BEB216FD Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender:Content-Type: Content-Transfer-Encoding:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=S5ISRvL2dj0gi/W6+YtEkwy2iRtdHaCf/flbIbhtdmc=; b=j8nR5h5KbmV5QU58wER2L3/h4 wUoqP8VOi1iLqR7khq44a+VptO2TqPexx2qXKrPRegpuLyBj6Eo+u26ZLk705nLGTrc0f+4ia6ihb +k9bR/uQj+vJs6T71+RhgxmarBz9Mr2/2IC+gY+UBlbPekBZINekRhAMEBGkQJShi4jJ0KkGK+HwW P6JfJPliwILE+LQ7gt0miKwlUhdYbXu1hBr9e6nyXnLHIEmmu5mQLqQE1ylJT0+q6XtsNtCAShHRN nED10IthkYhm2w+3yRBuwmDF2K9m2bOzTE2X/2w4//YGA1tR/aYKNEgmcI/6co+yfZhWTxX+Q5sAa iEyyxM1BQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hQrgP-0001tt-Sa; Wed, 15 May 2019 11:02:49 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hQrgM-0001t3-H3 for linux-arm-kernel@lists.infradead.org; Wed, 15 May 2019 11:02:47 +0000 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 21FA480D; Wed, 15 May 2019 04:02:46 -0700 (PDT) Received: from [10.1.196.75] (e110467-lin.cambridge.arm.com [10.1.196.75]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id BD9043F703; Wed, 15 May 2019 04:02:44 -0700 (PDT) Subject: Re: [PATCH] arm64: do_csum: implement accelerated scalar version To: Will Deacon References: <20190218230842.11448-1-ard.biesheuvel@linaro.org> <20190412095243.GA27193@fuggles.cambridge.arm.com> <41b30c72-c1c5-14b2-b2e1-3507d552830d@arm.com> <20190515094704.GC24357@fuggles.cambridge.arm.com> From: Robin Murphy Message-ID: <67c2f851-9a4d-e18d-4664-c07287e72ebf@arm.com> Date: Wed, 15 May 2019 12:02:43 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20190515094704.GC24357@fuggles.cambridge.arm.com> Content-Language: en-GB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190515_040246_569752_AE631AF2 X-CRM114-Status: GOOD ( 16.79 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ard Biesheuvel , netdev@vger.kernel.org, ilias.apalodimas@linaro.org, Zhangshaokun , "huanglingyan \(A\)" , linux-arm-kernel@lists.infradead.org, steve.capper@arm.com Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 15/05/2019 10:47, Will Deacon wrote: > On Mon, Apr 15, 2019 at 07:18:22PM +0100, Robin Murphy wrote: >> On 12/04/2019 10:52, Will Deacon wrote: >>> I'm waiting for Robin to come back with numbers for a C implementation. >>> >>> Robin -- did you get anywhere with that? >> >> Still not what I would call finished, but where I've got so far (besides an >> increasingly elaborate test rig) is as below - it still wants some unrolling >> in the middle to really fly (and actual testing on BE), but the worst-case >> performance already equals or just beats this asm version on Cortex-A53 with >> GCC 7 (by virtue of being alignment-insensitive and branchless except for >> the loop). Unfortunately, the advantage of C code being instrumentable does >> also come around to bite me... > > Is there any interest from anybody in spinning a proper patch out of this? > Shaokun? FWIW I've learned how to fix the KASAN thing now, so I'll try giving this some more love while I've got other outstanding optimisation stuff to look at anyway. Robin. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel