From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932338AbdJYWKb (ORCPT ); Wed, 25 Oct 2017 18:10:31 -0400 Received: from mga06.intel.com ([134.134.136.31]:10660 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751775AbdJYWKa (ORCPT ); Wed, 25 Oct 2017 18:10:30 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.43,433,1503385200"; d="scan'208";a="913777942" From: kan.liang@intel.com To: acme@kernel.org, peterz@infradead.org, mingo@redhat.com, linux-kernel@vger.kernel.org Cc: jolsa@kernel.org, eranian@google.com, ak@linux.intel.com, dan.j.williams@intel.com, Kan Liang Subject: [PATCH V2] perf script: add script to profile and resolve physical mem type Date: Wed, 25 Oct 2017 15:09:23 -0700 Message-Id: <1508969363-351481-1-git-send-email-kan.liang@intel.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kan Liang There could be different types of memory in the system. E.g normal System Memory, Persistent Memory. To understand how the workload maps to those memories, it's important to know the I/O statistics of them. Perf can collect physical addresses, but those are raw data. It still needs extra work to resolve the physical addresses. Provide a script to facilitate the physical addresses resolving and I/O statistics. Profile with MEM_INST_RETIRED.ALL_LOADS or MEM_UOPS_RETIRED.ALL_LOADS event if any of them is available. Look up the /proc/iomem and resolve the physical address. Provide memory type summary. Here is an example output. #perf script report mem-phys-addr Event: mem_inst_retired.all_loads:P Memory type count percentage ---------------------------------------- ----------- ----------- System RAM 74 53.2% Persistent Memory 55 39.6% N/A 10 7.2% Signed-off-by: Kan Liang --- Changes since V1: - Do not mix DLA and Load Latency. Do not compare the loads and stores. Only profile the loads. - Use event name to replace the RAW event tools/perf/scripts/python/bin/mem-phys-addr-record | 19 +++++ tools/perf/scripts/python/bin/mem-phys-addr-report | 3 + tools/perf/scripts/python/mem-phys-addr.py | 97 ++++++++++++++++++++++ .../util/scripting-engines/trace-event-python.c | 2 + 4 files changed, 121 insertions(+) create mode 100644 tools/perf/scripts/python/bin/mem-phys-addr-record create mode 100644 tools/perf/scripts/python/bin/mem-phys-addr-report create mode 100644 tools/perf/scripts/python/mem-phys-addr.py diff --git a/tools/perf/scripts/python/bin/mem-phys-addr-record b/tools/perf/scripts/python/bin/mem-phys-addr-record new file mode 100644 index 0000000..5a87512 --- /dev/null +++ b/tools/perf/scripts/python/bin/mem-phys-addr-record @@ -0,0 +1,19 @@ +#!/bin/bash + +# +# Profiling physical memory by all retired load instructions/uops event +# MEM_INST_RETIRED.ALL_LOADS or MEM_UOPS_RETIRED.ALL_LOADS +# + +load=`perf list | grep mem_inst_retired.all_loads` +if [ -z "$load" ]; then + load=`perf list | grep mem_uops_retired.all_loads` +fi +if [ -z "$load" ]; then + echo "There is no event to count all retired load instructions/uops." + exit 1 +fi + +arg=$(echo $load | tr -d ' ') +arg="$arg:P" +perf record --phys-data -e $arg $@ diff --git a/tools/perf/scripts/python/bin/mem-phys-addr-report b/tools/perf/scripts/python/bin/mem-phys-addr-report new file mode 100644 index 0000000..3f2b847 --- /dev/null +++ b/tools/perf/scripts/python/bin/mem-phys-addr-report @@ -0,0 +1,3 @@ +#!/bin/bash +# description: resolve physical address samples +perf script $@ -s "$PERF_EXEC_PATH"/scripts/python/mem-phys-addr.py diff --git a/tools/perf/scripts/python/mem-phys-addr.py b/tools/perf/scripts/python/mem-phys-addr.py new file mode 100644 index 0000000..1d1f757 --- /dev/null +++ b/tools/perf/scripts/python/mem-phys-addr.py @@ -0,0 +1,97 @@ +# mem-phys-addr.py: Resolve physical address samples +# Copyright (c) 2017, Intel Corporation. +# +# This program is free software; you can redistribute it and/or modify it +# under the terms and conditions of the GNU General Public License, +# version 2, as published by the Free Software Foundation. +# +# This program is distributed in the hope it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for +# more details. + +from __future__ import division +import os +import sys +import struct +import re +import bisect +import collections + +sys.path.append(os.environ['PERF_EXEC_PATH'] + \ + '/scripts/python/Perf-Trace-Util/lib/Perf/Trace') + +system_ram = [] +pmem = [] +f = None +load_mem_type_cnt = collections.Counter() +event_name = None + +def parse_iomem(): + global f + f = open('/proc/iomem', 'r') + for i, j in enumerate(f): + m = re.split('-|:',j,2) + if m[2].strip() == 'System RAM': + system_ram.append(long(m[0], 16)) + system_ram.append(long(m[1], 16)) + if m[2].strip() == 'Persistent Memory': + pmem.append(long(m[0], 16)) + pmem.append(long(m[1], 16)) + +def print_memory_type(): + print "Event: %s" % (event_name) + print "%-40s %10s %10s\n" % ("Memory type", "count", "percentage"), + print "%-40s %10s %10s\n" % ("----------------------------------------", \ + "-----------", "-----------"), + total = sum(load_mem_type_cnt.values()) + for mem_type, count in sorted(load_mem_type_cnt.most_common(), \ + key = lambda(k, v): (v, k), reverse = True): + print "%-40s %10d %10.1f%%\n" % (mem_type, count, 100 * count / total), + +def trace_begin(): + parse_iomem() + +def trace_end(): + print_memory_type() + f.close() + +def is_system_ram(phys_addr): + #/proc/iomem is sorted + position = bisect.bisect(system_ram, phys_addr) + if position % 2 == 0: + return False + return True + +def is_persistent_mem(phys_addr): + position = bisect.bisect(pmem, phys_addr) + if position % 2 == 0: + return False + return True + +def find_memory_type(phys_addr): + if phys_addr == 0: + return "N/A" + if is_system_ram(phys_addr): + return "System RAM" + + if is_persistent_mem(phys_addr): + return "Persistent Memory" + + #slow path, search all + f.seek(0, 0) + for j in f: + m = re.split('-|:',j,2) + if long(m[0], 16) <= phys_addr <= long(m[1], 16): + return m[2] + return "N/A" + +def process_event(param_dict): + name = param_dict["ev_name"] + sample = param_dict["sample"] + phys_addr = sample["phys_addr"] + + global event_name + if event_name == None: + event_name = name + load_mem_type_cnt[find_memory_type(phys_addr)] += 1 diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c index c7187f0..8cd6317 100644 --- a/tools/perf/util/scripting-engines/trace-event-python.c +++ b/tools/perf/util/scripting-engines/trace-event-python.c @@ -500,6 +500,8 @@ static PyObject *get_perf_sample_dict(struct perf_sample *sample, PyLong_FromUnsignedLongLong(sample->time)); pydict_set_item_string_decref(dict_sample, "period", PyLong_FromUnsignedLongLong(sample->period)); + pydict_set_item_string_decref(dict_sample, "phys_addr", + PyLong_FromUnsignedLongLong(sample->phys_addr)); set_sample_read_in_dict(dict_sample, sample, evsel); pydict_set_item_string_decref(dict, "sample", dict_sample); -- 2.7.4