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 -a $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_die()
101{
102	echo -n "Checking $1 output: per die "
103	if ParanoidAndNotRoot 0
104	then
105		echo "[Skip] paranoid and not root"
106		return
107	fi
108	perf stat --per-die -a $2 true
109	commachecker --per-die
110	echo "[Success]"
111}
112
113check_per_node()
114{
115	echo -n "Checking $1 output: per node "
116	if ParanoidAndNotRoot 0
117	then
118		echo "[Skip] paranoid and not root"
119		return
120	fi
121	perf stat --per-node -a $2 true
122	commachecker --per-node
123	echo "[Success]"
124}
125
126check_per_socket()
127{
128	echo -n "Checking $1 output: per socket "
129	if ParanoidAndNotRoot 0
130	then
131		echo "[Skip] paranoid and not root"
132		return
133	fi
134	perf stat --per-socket -a $2 true
135	commachecker --per-socket
136	echo "[Success]"
137}
138
139# The perf stat options for per-socket, per-core, per-die
140# and -A ( no_aggr mode ) uses the info fetched from this
141# directory: "/sys/devices/system/cpu/cpu*/topology". For
142# example, socket value is fetched from "physical_package_id"
143# file in topology directory.
144# Reference: cpu__get_topology_int in util/cpumap.c
145# If the platform doesn't expose topology information, values
146# will be set to -1. For example, incase of pSeries platform
147# of powerpc, value for  "physical_package_id" is restricted
148# and set to -1. Check here validates the socket-id read from
149# topology file before proceeding further
150
151FILE_LOC="/sys/devices/system/cpu/cpu*/topology/"
152FILE_NAME="physical_package_id"
153
154function check_for_topology()
155{
156	if ! ParanoidAndNotRoot 0
157	then
158		socket_file=`ls $FILE_LOC/$FILE_NAME | head -n 1`
159		[ -z $socket_file ] && {
160			echo 0
161			return
162		}
163		socket_id=`cat $socket_file`
164		[ $socket_id == -1 ] && {
165			echo 1
166			return
167		}
168	fi
169	echo 0
170}