From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754176AbaHOH0j (ORCPT ); Fri, 15 Aug 2014 03:26:39 -0400 Received: from e8.ny.us.ibm.com ([32.97.182.138]:34368 "EHLO e8.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752993AbaHOH0e (ORCPT ); Fri, 15 Aug 2014 03:26:34 -0400 From: Sukadev Bhattiprolu To: Arnaldo Carvalho de Melo , ak@linux.intel.com, Jiri Olsa , peterz@infradead.org, eranian@google.com Cc: dev@codyps.com, Michael Ellerman , Anshuman Khandual , , linuxppc-dev@lists.ozlabs.org Subject: [PATCH v2 04/14] perf Documentation: add event parameters Date: Fri, 15 Aug 2014 00:26:13 -0700 Message-Id: <1408087583-32239-5-git-send-email-sukadev@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1408087583-32239-1-git-send-email-sukadev@linux.vnet.ibm.com> References: <1408087583-32239-1-git-send-email-sukadev@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14081507-0320-0000-0000-0000003C9BD3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Cody P Schafer Event parameters are a basic way for partial events to be specified in sysfs with per-event names given to the fields that need to be filled in when using a particular event. It is intended for supporting cases where the single 'cpu' parameter is insufficient. For example, POWER 8 has events for physical sockets/cores/cpus that are accessible from with virtual machines. To keep using the single 'cpu' parameter we'd need to perform a mapping between Linux's cpus and the physical machine's cpus (in this case Linux is running under a hypervisor). This isn't possible because bindings between our cpus and physical cpus may not be fixed, and we probably won't have a "cpu" on each physical cpu. CC: Haren Myneni CC: Cody P Schafer Signed-off-by: Cody P Schafer Signed-off-by: Sukadev Bhattiprolu --- Documentation/ABI/testing/sysfs-bus-event_source-devices-events | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events index 20979f8..c1f9850 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events @@ -52,12 +52,18 @@ Description: Per-pmu performance monitoring events specific to the running syste event=0x2abc event=0x423,inv,cmask=0x3 domain=0x1,offset=0x8,starting_index=0xffff + domain=0x1,offset=0x8,starting_index=phys_cpu Each of the assignments indicates a value to be assigned to a particular set of bits (as defined by the format file corresponding to the ) in the perf_event structure passed to the perf_open syscall. + In the case of the last example, a value replacing "phys_cpu" + would need to be provided by the user selecting the particular + event. This is refered to as "event parameterization". All + non-numerical values indicate an event parameter. + What: /sys/bus/event_source/devices//events/.unit Date: 2014/02/24 Contact: Linux kernel mailing list -- 1.8.3.1