From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934924AbbIVVaM (ORCPT ); Tue, 22 Sep 2015 17:30:12 -0400 Received: from mga11.intel.com ([192.55.52.93]:25758 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934831AbbIVVaH (ORCPT ); Tue, 22 Sep 2015 17:30:07 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,574,1437462000"; d="scan'208";a="810764261" From: kan.liang@intel.com To: acme@kernel.org Cc: jolsa@kernel.org, a.p.zijlstra@chello.nl, mingo@redhat.com, namhyung@kernel.org, ak@linux.intel.com, linux-kernel@vger.kernel.org, Kan Liang Subject: [PATCH RFC 00/10] counter read during perf sampling Date: Tue, 22 Sep 2015 10:13:33 -0400 Message-Id: <1442931223-51708-1-git-send-email-kan.liang@intel.com> X-Mailer: git-send-email 1.8.3.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kan Liang The patch series intends to read counter statistics with fixed frequency during sampling. The instant benefit is that we can read memory bandwidth from uncore event during cpu PMU event is sampling. Introduce 'C' event/group modifier. The event with this modifier will do counting not sampling. If a group with this modifier, only group leader do sampling. The counter statistics will be wrote in new RECORD type PERF_RECORD_COUNTER_READ and stored in perf.data. So perf report can present the counter statistics data accordingly. There may be an alternative way to get counter statistics during sampling by running perf record and perf stat together by script. But the script way have various issue and complex to parses the output. Example: $perf record -e 'cycles,uncore_imc_1/cas_count_read/C' --counter-read-interval 10 -a ./tchain_edit [ perf record: Woken up 438 times to write data ] [ perf record: Captured and wrote 1.232 MB perf.data (17901 samples) ] $perf report -D 0x3cae0 [0x28]: PERF_RECORD_COUNTER_READ: uncore_imc_1/cas_count_read/C CPU 0: val 1205 ena 2046148 run 2046148 0x3cb08 [0x28]: PERF_RECORD_COUNTER_READ: uncore_imc_1/cas_count_read/C CPU 18: val 1315 ena 2001918 run 2001918 0x3dba0 [0x28]: PERF_RECORD_COUNTER_READ: uncore_imc_1/cas_count_read/C CPU 0: val 1588 ena 12191520 run 12191520 0x3dbc8 [0x28]: PERF_RECORD_COUNTER_READ: uncore_imc_1/cas_count_read/C CPU 18: val 1686 ena 12162202 run 12162202 $perf report --stdio --socket-filter 0 # To display the perf.data header info, please use --header/--header-only options. # # # Total Lost Samples: 0 # # Samples: 17K of event 'cycles' # Event count (approx.): 10119095556 # Processor Socket: 0 # # Overhead Command Shared Object Symbol # ........ ............ ................... .................................. # 97.68% tchain_edit tchain_edit [.] f3 0.07% tchain_edit tchain_edit [.] f2 0.04% swapper [kernel.vmlinux] [k] run_timer_softirq 0.04% swapper [kernel.vmlinux] [k] find_busiest_group # Samples: 0 of event 'uncore_imc_1/cas_count_read/C' # Event count (approx.): 0 # Processor Socket: 0 # uncore_imc_1/cas_count_read/C: 35937 Kan Liang (10): perf,tools: Add 'C' event/group modifier perf,tools: Enable counter statistic read for perf record perf,tools: don't validate counter read event perf,tools: New RECORD type PERF_RECORD_COUNTER_READ perf,tools: record counter statistics during sampling perf,tools: option to set counter read interval perf,report: handle PERF_RECORD_COUNTER_READ perf,tools: store counter val in events_stats perf,tools: show counter read result in studio perf,tools: show counter read result in tui browser title tools/perf/Documentation/perf-list.txt | 5 ++ tools/perf/Documentation/perf-record.txt | 8 +++ tools/perf/builtin-record.c | 73 ++++++++++++++++++++++ tools/perf/builtin-report.c | 101 ++++++++++++++++++++++++++++++- tools/perf/ui/browsers/hists.c | 37 +++++++++++ tools/perf/util/event.c | 1 + tools/perf/util/event.h | 21 +++++++ tools/perf/util/evlist.c | 20 ++++++ tools/perf/util/evsel.c | 29 +++++++++ tools/perf/util/evsel.h | 1 + tools/perf/util/parse-events.c | 8 ++- tools/perf/util/parse-events.l | 2 +- tools/perf/util/record.c | 6 +- tools/perf/util/session.c | 16 +++++ tools/perf/util/tool.h | 1 + 15 files changed, 324 insertions(+), 5 deletions(-) -- 1.8.3.1