1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3 4# Return true if perf_event_paranoid is > $1 and not running as root. 5function ParanoidAndNotRoot() 6{ 7 [ "$(id -u)" != 0 ] && [ "$(cat /proc/sys/kernel/perf_event_paranoid)" -gt $1 ] 8} 9 10# $1 name $2 extra_opt 11check_no_args() 12{ 13 echo -n "Checking $1 output: no args " 14 perf stat $2 true 15 commachecker --no-args 16 echo "[Success]" 17} 18 19check_system_wide() 20{ 21 echo -n "Checking $1 output: system wide " 22 if ParanoidAndNotRoot 0 23 then 24 echo "[Skip] paranoid and not root" 25 return 26 fi 27 perf stat -a $2 true 28 commachecker --system-wide 29 echo "[Success]" 30} 31 32check_system_wide_no_aggr() 33{ 34 echo -n "Checking $1 output: system wide no aggregation " 35 if ParanoidAndNotRoot 0 36 then 37 echo "[Skip] paranoid and not root" 38 return 39 fi 40 perf stat -A -a --no-merge $2 true 41 commachecker --system-wide-no-aggr 42 echo "[Success]" 43} 44 45check_interval() 46{ 47 echo -n "Checking $1 output: interval " 48 perf stat -I 1000 $2 true 49 commachecker --interval 50 echo "[Success]" 51} 52 53check_event() 54{ 55 echo -n "Checking $1 output: event " 56 perf stat -e cpu-clock $2 true 57 commachecker --event 58 echo "[Success]" 59} 60 61check_per_core() 62{ 63 echo -n "Checking $1 output: per core " 64 if ParanoidAndNotRoot 0 65 then 66 echo "[Skip] paranoid and not root" 67 return 68 fi 69 perf stat --per-core -a $2 true 70 commachecker --per-core 71 echo "[Success]" 72} 73 74check_per_thread() 75{ 76 echo -n "Checking $1 output: per thread " 77 if ParanoidAndNotRoot 0 78 then 79 echo "[Skip] paranoid and not root" 80 return 81 fi 82 perf stat --per-thread -p $$ $2 true 83 commachecker --per-thread 84 echo "[Success]" 85} 86 87check_per_cache_instance() 88{ 89 echo -n "Checking $1 output: per cache instance " 90 if ParanoidAndNotRoot 0 91 then 92 echo "[Skip] paranoid and not root" 93 return 94 fi 95 perf stat --per-cache -a $2 true 96 commachecker --per-cache 97 echo "[Success]" 98} 99 100check_per_cluster() 101{ 102 echo -n "Checking $1 output: per cluster " 103 if ParanoidAndNotRoot 0 104 then 105 echo "[Skip] paranoid and not root" 106 return 107 fi 108 perf stat --per-cluster -a $2 true 109 echo "[Success]" 110} 111 112check_per_die() 113{ 114 echo -n "Checking $1 output: per die " 115 if ParanoidAndNotRoot 0 116 then 117 echo "[Skip] paranoid and not root" 118 return 119 fi 120 perf stat --per-die -a $2 true 121 commachecker --per-die 122 echo "[Success]" 123} 124 125check_per_node() 126{ 127 echo -n "Checking $1 output: per node " 128 if ParanoidAndNotRoot 0 129 then 130 echo "[Skip] paranoid and not root" 131 return 132 fi 133 perf stat --per-node -a $2 true 134 commachecker --per-node 135 echo "[Success]" 136} 137 138check_per_socket() 139{ 140 echo -n "Checking $1 output: per socket " 141 if ParanoidAndNotRoot 0 142 then 143 echo "[Skip] paranoid and not root" 144 return 145 fi 146 perf stat --per-socket -a $2 true 147 commachecker --per-socket 148 echo "[Success]" 149} 150 151# The perf stat options for per-socket, per-core, per-die 152# and -A ( no_aggr mode ) uses the info fetched from this 153# directory: "/sys/devices/system/cpu/cpu*/topology". For 154# example, socket value is fetched from "physical_package_id" 155# file in topology directory. 156# Reference: cpu__get_topology_int in util/cpumap.c 157# If the platform doesn't expose topology information, values 158# will be set to -1. For example, incase of pSeries platform 159# of powerpc, value for "physical_package_id" is restricted 160# and set to -1. Check here validates the socket-id read from 161# topology file before proceeding further 162 163FILE_LOC="/sys/devices/system/cpu/cpu*/topology/" 164FILE_NAME="physical_package_id" 165 166function check_for_topology() 167{ 168 if ! ParanoidAndNotRoot 0 169 then 170 socket_file=`ls $FILE_LOC/$FILE_NAME | head -n 1` 171 [ -z $socket_file ] && { 172 echo 0 173 return 174 } 175 socket_id=`cat $socket_file` 176 [ $socket_id == -1 ] && { 177 echo 1 178 return 179 } 180 fi 181 echo 0 182} 183