From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752824AbeC1K3m (ORCPT ); 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 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-Type: text/plain; charset="iso-8859-1" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id w2SATkwb006423 Hello Daniel, Am Dienstag, 27. März 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-rt25 (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 get the requested irq rate? Greets Alex [1] https://packages.debian.org/stretch/itop