Received: by 10.213.65.68 with SMTP id h4csp279950imn; Wed, 28 Mar 2018 03:31:27 -0700 (PDT) X-Google-Smtp-Source: AIpwx488EYVcC5vq5hMhR7hrcDMnWQSt6jkEXDa6eaiKFo7EXIJpLuyXzwiseJOBtqyzz4xfalf+ X-Received: by 10.99.64.65 with SMTP id n62mr1912408pga.259.1522233087736; Wed, 28 Mar 2018 03:31:27 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1522233087; cv=none; d=google.com; s=arc-20160816; b=EOwpfGjDNhA6UYTg6/vIFtdnoXBRHMmbTxCaSkpmT66g0ZtcaN/AzmC62bpc1VHqkf 7nFX4GXzRCY08ubhomPYQQRSKZDWv45SPIHUW2NSyuSovOh1PibnUa0yYMODlAoHK0eH BFdT4uIWmuVsR9V/D9xcl5/CyJOuUmRdThpRE8b8xhstYdXySkWRwdBOFharMqK+OBeR VIM0t9RQuh8YbdDLXTHQra/SZk8CpjHDskTLAx824dzLouhu7AHAwRc54hhRieQR/kyw XvE3vVPMYGEJqDabyL8xzTgQCTFpMUo2/k1SQpOPcwHQsnJV29Cod1l/AE3GymUftZcS 1HTA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:references :in-reply-to:message-id:date:subject:cc:to:from :arc-authentication-results; bh=0A3Fl/AOjcy/SLBjXK68aTVNvxPJt+bbkA9cy9fnD9s=; b=xOzVHnhzMYmWd2H6P9Jz+vX7fLDipDchMDQSe2DD0Cwl7+gwPhrO1HiOQDYkwCDYwf eUer8vsam/B/iYz1swvPA6Z9xM0mrQzzYjuRCynYwz7GFCiJ9dMK6W5lmQeoO1blptXd R7rTpT+7O5/59//C17hzSZX4PQowN9orQQuNIT3WAkKpaTDRd9ZVIB+H0yaoUVEQNWlw ig/fT4WmjB88PCPtZlRqZXXW0jhL9xwIo7U8vYrpQByBODLxMQK4PLq9xiaRG740hSD8 4Br8yo25GfGQNEHUXrFt/3/BayE6Dxz8lxjY3RAdOCwohI4Fb/wkbbvzZFz37oqrziDC 4f2Q== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id e193si2248908pgc.785.2018.03.28.03.31.12; Wed, 28 Mar 2018 03:31:27 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752816AbeC1K3m (ORCPT + 99 others); Wed, 28 Mar 2018 06:29:42 -0400 Received: from mail.thorsis.com ([92.198.35.195]:35286 "EHLO mail.thorsis.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751207AbeC1K32 (ORCPT ); Wed, 28 Mar 2018 06:29:28 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.thorsis.com (Postfix) with ESMTP id 111983A4539; Wed, 28 Mar 2018 12:29:29 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at mail.thorsis.com Received: from mail.thorsis.com ([127.0.0.1]) by localhost (mail.thorsis.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UCdTHoghzhMk; Wed, 28 Mar 2018 12:29:26 +0200 (CEST) From: Alexander Dahl To: Daniel Lezcano Cc: linux-arm-kernel@lists.infradead.org, Alexandre Belloni , linux-kernel@vger.kernel.org, Boris Brezillon , Thomas Gleixner Subject: Re: [PATCH v3 0/6] clocksource: rework Atmel TCB timer driver Date: Wed, 28 Mar 2018 12:29:20 +0200 Message-ID: <4073350.0MmxRoANOi@ada> In-Reply-To: <989df8a3-462a-c645-87f1-9f956e1b22c9@linaro.org> References: <20180223171558.7037-1-alexandre.belloni@bootlin.com> <9761072.pX2B0LJlSJ@ada> <989df8a3-462a-c645-87f1-9f956e1b22c9@linaro.org> Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-1" X-Spam-Status: No, score=-2.9 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham autolearn_force=no version=3.4.0 X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on seven.thorsis.com Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello Daniel, Am Dienstag, 27. M=E4rz 2018, 13:30:22 CEST schrieb Daniel Lezcano: > Can you can give a rough amount for the irq rate on the timer ? I used itop [1] now to get a rough estimate. First with kernel v4.14.29-rt2= 5=20 (fully preempt RT): INT NAME RATE MAX 19 [ vel tc_clkevt] 397 Ints/s (max: 432) 26 [ vel eth0] 4 Ints/s (max: 38) Next test with kernel v4.15.13 gives (slightly slower, but non-RT): INT NAME RATE MAX 19 [ vel tc_clkevt] 248 Ints/s (max: 273) 26 [ vel eth0] 4 Ints/s (max: 11) With kernel v4.16-rc7 plus this patch series and tcb as clocksource: INT NAME RATE MAX 17 [vel timer@fffa] 2164 Ints/s (max: 2183) 26 [ vel eth0] 5 Ints/s (max: 10) Is this the information you wanted? If not, could you point me on how to ge= t=20 the requested irq rate? Greets Alex [1] https://packages.debian.org/stretch/itop