From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753914AbaE1A1A (ORCPT ); Tue, 27 May 2014 20:27:00 -0400 Received: from mail-yh0-f42.google.com ([209.85.213.42]:59275 "EHLO mail-yh0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753871AbaE1A06 (ORCPT ); Tue, 27 May 2014 20:26:58 -0400 From: Cody P Schafer To: LKML , Linux PPC , Anshuman Khandual , Arnaldo Carvalho de Melo , Benjamin Herrenschmidt , Cody P Schafer , Michael Ellerman , Runzhen Wang , Sukadev Bhattiprolu Cc: linux-doc@vger.kernel.org, Randy Dunlap Subject: [PATCH 05/16] perf Documentation: add event parameters Date: Tue, 27 May 2014 17:22:00 -0700 Message-Id: <1401236684-10579-6-git-send-email-dev@codyps.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1401236684-10579-1-git-send-email-dev@codyps.com> References: <1401236684-10579-1-git-send-email-dev@codyps.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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: Sukadev Bhattiprolu Signed-off-by: Cody P Schafer --- 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 -- 1.9.3