From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932269AbeASPPM convert rfc822-to-8bit (ORCPT ); Fri, 19 Jan 2018 10:15:12 -0500 Received: from mga14.intel.com ([192.55.52.115]:25562 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755524AbeASPPE (ORCPT ); Fri, 19 Jan 2018 10:15:04 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,381,1511856000"; d="scan'208";a="11883948" From: "Liang, Kan" To: Peter Zijlstra CC: "tglx@linutronix.de" , "mingo@redhat.com" , "linux-kernel@vger.kernel.org" , "acme@kernel.org" , "eranian@google.com" , "ak@linux.intel.com" Subject: RE: [PATCH V5 4/8] perf/x86/intel/uncore: add new data structures for free running counters Thread-Topic: [PATCH V5 4/8] perf/x86/intel/uncore: add new data structures for free running counters Thread-Index: AQHTjjLMO5E6Fi0JBEaHVwBOA31k86N5HycAgACap6CAAPCdgIAApDaA Date: Fri, 19 Jan 2018 15:15:00 +0000 Message-ID: <37D7C6CF3E00A74B8858931C1DB2F077538025E7@SHSMSX103.ccr.corp.intel.com> References: <1516042629-387021-1-git-send-email-kan.liang@intel.com> <1516042629-387021-4-git-send-email-kan.liang@intel.com> <20180118133248.GC2249@hirez.programming.kicks-ass.net> <37D7C6CF3E00A74B8858931C1DB2F07753801FEF@SHSMSX103.ccr.corp.intel.com> <20180119130731.GQ2228@hirez.programming.kicks-ass.net> In-Reply-To: <20180119130731.GQ2228@hirez.programming.kicks-ass.net> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-titus-metadata-40: eyJDYXRlZ29yeUxhYmVscyI6IiIsIk1ldGFkYXRhIjp7Im5zIjoiaHR0cDpcL1wvd3d3LnRpdHVzLmNvbVwvbnNcL0ludGVsMyIsImlkIjoiNzYwMTVkODYtZGJjNy00YzBhLTk3ZjQtMjEzYjUzMzIwMTA0IiwicHJvcHMiOlt7Im4iOiJDVFBDbGFzc2lmaWNhdGlvbiIsInZhbHMiOlt7InZhbHVlIjoiQ1RQX0lDIn1dfV19LCJTdWJqZWN0TGFiZWxzIjpbXSwiVE1DVmVyc2lvbiI6IjE2LjUuOS4zIiwiVHJ1c3RlZExhYmVsSGFzaCI6IjE2bTBzMXIyOXRna01NT3JMczlXSmpPQTFDR1dpcndSMTNFUjlDcnJhZkU9In0= x-ctpclassification: CTP_IC dlp-product: dlpe-windows dlp-version: 11.0.0.116 dlp-reaction: no-action x-originating-ip: [10.239.127.40] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > > On Thu, Jan 18, 2018 at 05:43:10PM +0000, Liang, Kan wrote: > > In the uncore document, there is no event-code assigned to free running > counters. > > Some events need to be defined to indicate the free running counters. > > The events are encoded as event-code + umask-code. > > > > The event-code for all free running counters is 0xff, which is the > > same as the fixed counters. > > Is it possible to count the same things using the generic counters? > Yes, there are events for generic counters to count bandwidth and utilization. The reasons of introducing free running counters are - To provide highly valuable information (bandwidth and utilization) which most of the customers are interested in - To save on the precious generic counters Thanks, Kan