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=-5.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS 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 90D3FC43441 for ; Sun, 25 Nov 2018 02:44:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 46AD920867 for ; Sun, 25 Nov 2018 02:44:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="cokX/umg" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 46AD920867 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727028AbeKYNeo (ORCPT ); Sun, 25 Nov 2018 08:34:44 -0500 Received: from mail-pg1-f194.google.com ([209.85.215.194]:45447 "EHLO mail-pg1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726722AbeKYNen (ORCPT ); Sun, 25 Nov 2018 08:34:43 -0500 Received: by mail-pg1-f194.google.com with SMTP id y4so4565532pgc.12 for ; Sat, 24 Nov 2018 18:44:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:references:cc:from:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding; bh=hMuploDnEdcZzBOSrvREITOrPwp67uGDmyvlX5GyxQ4=; b=cokX/umgn0K8VfZiNzf2wcl2uEzh7cB1VECQyjEJQeDrBQoPS8Hsq4EqSVakePIPh4 3YTsraZMtEDUKRbKEtTMzM7aiHI0PjlgNivdXUq2f2PfDzt0sYWo0HTFobRiFVhoAKTX QGwiJ9hILBpDD7XCOzHB7zvcyw4y1QPWKKZ+oJQ1S2Cjeo7YvVSH0TaRfreC5f5VC8gg IWIV/th4a0wOSbDUeQNMO9zmU7+AxZ6s8FVaxWrNoC3yKxQ30zPcdQKdJj+YTu50YDdt LSd+ymTCAcB/Gt0UyiT1n5foZCjxKQ3AJaKq7FsSXTKEFWbJH+K8PyWCpeZyWHHPqDIY sRbA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:cc:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding; bh=hMuploDnEdcZzBOSrvREITOrPwp67uGDmyvlX5GyxQ4=; b=tT/mMMLcTpL3dCi0rjum0cMoAUQd0GGDN1wVIsFmpb+3FESd2c50gbv1Ge2yNj1fsV Fot6PWELwiggkDzlowsbgfpXTza6PNx4woYo0IhRam2vpONTD7dgsy704zaRjWTZVD73 wVwb4EnxQzvFvlYjxotQSZGqzfGywRbSyd4YOHuZBseq25YkLKlidfcTy7REsW1zOrc9 qXbOCqoSVdybUb+q9BuTHTMwEMtRYTsatakbrfcj/gFMyJE30NblRZHY0TB5jJkORZ3D nD2zi8vEmr1z28j2vPJ9Rb7+PBg9ktVD7IXW/315V+Sdw/h2Hbroxx+TwWiepBLLD18y /r2w== X-Gm-Message-State: AA+aEWYwV8lqN/fLdoJ2RaBLgSRFe1MTu4nqECzzo/VkJi0wFN7FCTWb DXQupmsBhhU08zgB1F2t7NcFCql3tIM= X-Google-Smtp-Source: AFSGD/X01dgYZKnnTBwKTUX8u6Oh39rznqiEuigS8b/oiJwM2Ga2Ce3wsmdOCqyimbF8LZ5XZA8odA== X-Received: by 2002:a63:a35c:: with SMTP id v28mr19658891pgn.205.1543113884618; Sat, 24 Nov 2018 18:44:44 -0800 (PST) Received: from [192.168.1.101] (122-58-176-92-adsl.sparkbb.co.nz. [122.58.176.92]) by smtp.gmail.com with ESMTPSA id r130sm31790537pfr.48.2018.11.24.18.44.35 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 24 Nov 2018 18:44:43 -0800 (PST) Subject: Re: [RFC PATCH v2 09/14] m68k: hp300: Remove hp300_gettimeoffset() To: Finn Thain , Geert Uytterhoeven References: Cc: Kars de Jong , Philip Blundell , Andreas Schwab , Arnd Bergmann , Stephen N Chivers , Thomas Gleixner , Daniel Lezcano , John Stultz , Linus Walleij , linux-m68k , Linux Kernel Mailing List From: Michael Schmitz Message-ID: <36b78174-5038-a1ac-4c70-d84a34edd275@gmail.com> Date: Sun, 25 Nov 2018 15:44:33 +1300 User-Agent: Mozilla/5.0 (X11; Linux ppc; rv:45.0) Gecko/20100101 Icedove/45.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Finn, Am 25.11.2018 um 14:15 schrieb Finn Thain: > Maybe the timer interrupt has a sufficiently high priority and latency is > low? Maybe cia_set_irq() is really expensive? > > I don't know the platform well enough so I'm inclined to revert. We can > benchmark gettimeofday syscalls on elgar but is that hardware > representative of other relevant models? I suppose the CIA is on the main board, so running with the slower clock speed that you'd see with a vanilla Amiga without 060 accelerator board. Ought to be representative enough? Adrian has a few other Amigas with different hardware base, so we might be able to get test coverage on more than one model. Cheers, Michael > [1] > https://github.com/mamedev/mame/commit/e2ed0490520f538c346c8bdaa9084bcbc43427cb > > [2] > http://vice-emu.sourceforge.net/vice_9.html > > [3] > https://www.commodore.ca/manuals/funet/cbm/documents/chipdata/cia6526.zip >