From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752478AbdJTOPt (ORCPT ); Fri, 20 Oct 2017 10:15:49 -0400 Received: from Galois.linutronix.de ([146.0.238.70]:40396 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752424AbdJTOPs (ORCPT ); Fri, 20 Oct 2017 10:15:48 -0400 Date: Fri, 20 Oct 2017 16:15:44 +0200 (CEST) From: Thomas Gleixner To: Kan Liang cc: Peter Zijlstra , x86@kernel.org, LKML , acme@kernel.org, eranian@google.com, ak@linux.intel.com Subject: Re: [PATCH V2 4/4] perf/x86/intel/uncore: SKX support for IIO freerunning counter In-Reply-To: <1508432137-3984-4-git-send-email-kan.liang@intel.com> Message-ID: References: <1508432137-3984-1-git-send-email-kan.liang@intel.com> <1508432137-3984-4-git-send-email-kan.liang@intel.com> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 19 Oct 2017, kan.liang@intel.com wrote: > As of Skylake Server, there are a number of free-running counters in > each IIO Box that collect counts for per box IO clocks and per Port > Input/Output x BW/Utilization. > > Freerunning counters cannot be written by SW. Counting will be suspended > only when the IIO Box is powered down. Free running counters are read only and always active when the IIO box is powered up. > > The bit width of freerunning counter is 36-bit. Please use 'free running' consistently all over the place. Thanks, tglx