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