From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754204AbaLVHuE (ORCPT ); Mon, 22 Dec 2014 02:50:04 -0500 Received: from e7.ny.us.ibm.com ([32.97.182.137]:41547 "EHLO e7.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754012AbaLVHuA (ORCPT ); Mon, 22 Dec 2014 02:50:00 -0500 From: Sukadev Bhattiprolu To: Arnaldo Carvalho de Melo , Jiri Olsa , Michael Ellerman , Paul Mackerras Cc: dev@codyps.com, peterz@infradead.org, hbabu@us.ibm.com, , linuxppc-dev@lists.ozlabs.org Subject: [PATCH v6 0/4] Add support for parametrized events Date: Sun, 21 Dec 2014 23:49:23 -0800 Message-Id: <1419234567-22784-1-git-send-email-sukadev@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.9.5 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14122207-0037-0000-0000-0000002EF786 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Description of "event parameters" from the documentation patch: 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. Description of the sysfs contents when events are parameterized (copied from an included patch): Examples: domain=0x1,offset=0x8,core=? In the case of the last example, a value replacing "?" 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. Notes on how perf-list displays parameterized events PARAMETERIZED EVENTS -------------------- Some pmu events listed by 'perf list' will be displayed with '$xyz' in them. For example: hv_24x7/HPM_THREAD_NAP_CCYC__PHYS_CORE,core=?/ This means that when provided as an event, a value for ? must also be supplied. For example: perf stat -e \ 'hv_24x7/HPM_THREAD_NAP_CCYC__PHYS_CORE,core=2' ... Changelog[v6] [Jiri Olsa, Sukadev Bhattiprolu] Rather than display 'starting_index=$core' in perf.list and sysfs and expect user to specify a value for 'starting_index', replace 'starting_index' with what it really means for the event. i.e for an event, if starting_index refers to 'core' then display 'core=?' in both perf list and sysfs (see examples above). Changelog[v5] - [Jiri Olsa, Peter Zijlstra] Use '$arg' notation rather than ? to indicate event parameters. - [Michael Ellerman] Separate the kernel and tool patches in the patchset into different patchsets. Changelog[v4] - [Jiri Olsa] Rebase to perf/core tree (fix small merge conflict) Changelog[v3] - [Jiri Olsa] Changed the event parameters are specified. If event file specifes 'param=val' make the usage 'param=123' rather than 'val=123'. (patch 1,2/10) - Shortened event names using "PHYS" and "VCPU" (patch 4/10) - Print help message if invalid parameter is specified or required parameter is missing. - Moved 3 patches that are unrelated to parametrized events into a separate patchset. - Reordered patches so code changes come first. Changelog[v2] - [Joe Perches, David Laight] Use beNN_to_cpu() instead of guessing the size from type. - Use kmem_cache_free() to free page allocated with kmem_cache_alloc(). - Rebase to recent kernel Cody P Schafer (4): tools/perf: support parsing parameterized events tools/perf: extend format_alias() to include event parameters perf Documentation: add event parameters tools/perf: Document parameterized and symbolic events .../testing/sysfs-bus-event_source-devices-events | 6 ++ tools/perf/Documentation/perf-list.txt | 13 +++ tools/perf/Documentation/perf-record.txt | 12 +++ tools/perf/Documentation/perf-stat.txt | 20 ++++- tools/perf/util/parse-events.h | 1 + tools/perf/util/pmu.c | 92 +++++++++++++++++++--- 6 files changed, 128 insertions(+), 16 deletions(-) -- 1.8.3.1