From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756748AbbAZRsX (ORCPT ); Mon, 26 Jan 2015 12:48:23 -0500 Received: from mail.kernel.org ([198.145.29.136]:52894 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756729AbbAZRsT (ORCPT ); Mon, 26 Jan 2015 12:48:19 -0500 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Cody P Schafer , Sukadev Bhattiprolu , Cody P Schafer , Haren Myneni , Jiri Olsa , Michael Ellerman , Paul Mackerras , Peter Zijlstra , linuxppc-dev@lists.ozlabs.org, Arnaldo Carvalho de Melo Subject: [PATCH 10/26] perf Documentation: Add event parameters Date: Mon, 26 Jan 2015 14:47:13 -0300 Message-Id: <1422294449-12735-11-git-send-email-acme@kernel.org> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1422294449-12735-1-git-send-email-acme@kernel.org> References: <1422294449-12735-1-git-send-email-acme@kernel.org> 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. Signed-off-by: Cody P Schafer Signed-off-by: Sukadev Bhattiprolu Acked-by: Jiri Olsa Cc: Cody P Schafer Cc: Haren Myneni Cc: Jiri Olsa Cc: Michael Ellerman Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Sukadev Bhattiprolu Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/1420679633-28856-4-git-send-email-sukadev@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo --- 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 20979f8b3edb..505f080d20a1 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,core=? 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 "?" would + need to be provided by the user selecting the particular event. + This is referred to as "event parameterization". Event + parameters have the format 'param=?'. + What: /sys/bus/event_source/devices//events/.unit Date: 2014/02/24 Contact: Linux kernel mailing list -- 1.9.3