1b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#!/bin/sh 2b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# 3b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# Copyright 2012 the V8 project authors. All rights reserved. 4b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# Redistribution and use in source and binary forms, with or without 5b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# modification, are permitted provided that the following conditions are 6b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# met: 7b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# 8b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# * Redistributions of source code must retain the above copyright 9b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# notice, this list of conditions and the following disclaimer. 10b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# * Redistributions in binary form must reproduce the above 11b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# copyright notice, this list of conditions and the following 12b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# disclaimer in the documentation and/or other materials provided 13b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# with the distribution. 14b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# * Neither the name of Google Inc. nor the names of its 15b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# contributors may be used to endorse or promote products derived 16b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# from this software without specific prior written permission. 17b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# 18b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 30b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch########## Global variable definitions 31b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 32b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch# Ensure that <your CPU clock> / $SAMPLE_EVERY_N_CYCLES < $MAXIMUM_SAMPLE_RATE. 33b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochMAXIMUM_SAMPLE_RATE=10000000 34b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochSAMPLE_EVERY_N_CYCLES=10000 35b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochSAMPLE_RATE_CONFIG_FILE="/proc/sys/kernel/perf_event_max_sample_rate" 36b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochKERNEL_MAP_CONFIG_FILE="/proc/sys/kernel/kptr_restrict" 37b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 38b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch########## Usage 39b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 40b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochusage() { 41b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochcat << EOF 42b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochusage: $0 <benchmark_command> 43b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 44b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochExecutes <benchmark_command> under observation by the kernel's "perf" \ 45b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochframework, then calls the low level tick processor to analyze the results. 46b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochEOF 47b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 48b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 49b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochif [ $# -eq 0 ] || [ "$1" == "-h" ] || [ "$1" == "--help" ] ; then 50b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch usage 51b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch exit 1 52b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochfi 53b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 54b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch########## Actual script execution 55b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 56b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochACTUAL_SAMPLE_RATE=$(cat $SAMPLE_RATE_CONFIG_FILE) 57b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochif [ "$ACTUAL_SAMPLE_RATE" -lt "$MAXIMUM_SAMPLE_RATE" ] ; then 58b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch echo "Setting appropriate maximum sample rate..." 59b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch echo $MAXIMUM_SAMPLE_RATE | sudo tee $SAMPLE_RATE_CONFIG_FILE 60b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochfi 61b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 62b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochACTUAL_KERNEL_MAP_RESTRICTION=$(cat $KERNEL_MAP_CONFIG_FILE) 63b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochif [ "$ACTUAL_KERNEL_MAP_RESTRICTION" -ne "0" ] ; then 64b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch echo "Disabling kernel address map restriction..." 65b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch echo 0 | sudo tee $KERNEL_MAP_CONFIG_FILE 66b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochfi 67b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 68b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochecho "Running benchmark..." 69b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochperf record -R -e cycles -c $SAMPLE_EVERY_N_CYCLES -f -i $@ --ll-prof 70