Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#!/bin/bash
2# perf stat tests
3# SPDX-License-Identifier: GPL-2.0
4
5set -e
6
7err=0
8test_default_stat() {
9 echo "Basic stat command test"
10 if ! perf stat true 2>&1 | grep -E -q "Performance counter stats for 'true':"
11 then
12 echo "Basic stat command test [Failed]"
13 err=1
14 return
15 fi
16 echo "Basic stat command test [Success]"
17}
18
19test_stat_record_report() {
20 echo "stat record and report test"
21 if ! perf stat record -o - true | perf stat report -i - 2>&1 | \
22 grep -E -q "Performance counter stats for 'pipe':"
23 then
24 echo "stat record and report test [Failed]"
25 err=1
26 return
27 fi
28 echo "stat record and report test [Success]"
29}
30
31test_stat_record_script() {
32 echo "stat record and script test"
33 if ! perf stat record -o - true | perf script -i - 2>&1 | \
34 grep -E -q "CPU[[:space:]]+THREAD[[:space:]]+VAL[[:space:]]+ENA[[:space:]]+RUN[[:space:]]+TIME[[:space:]]+EVENT"
35 then
36 echo "stat record and script test [Failed]"
37 err=1
38 return
39 fi
40 echo "stat record and script test [Success]"
41}
42
43test_stat_repeat_weak_groups() {
44 echo "stat repeat weak groups test"
45 if ! perf stat -e '{cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles}' \
46 true 2>&1 | grep -q 'seconds time elapsed'
47 then
48 echo "stat repeat weak groups test [Skipped event parsing failed]"
49 return
50 fi
51 if ! perf stat -r2 -e '{cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles}:W' \
52 true > /dev/null 2>&1
53 then
54 echo "stat repeat weak groups test [Failed]"
55 err=1
56 return
57 fi
58 echo "stat repeat weak groups test [Success]"
59}
60
61test_topdown_groups() {
62 # Topdown events must be grouped with the slots event first. Test that
63 # parse-events reorders this.
64 echo "Topdown event group test"
65 if ! perf stat -e '{slots,topdown-retiring}' true > /dev/null 2>&1
66 then
67 echo "Topdown event group test [Skipped event parsing failed]"
68 return
69 fi
70 td_err=0
71 do_topdown_group_test() {
72 events=$1
73 failure=$2
74 if perf stat -e "$events" true 2>&1 | grep -E -q "<not supported>"
75 then
76 echo "Topdown event group test [Failed $failure for '$events']"
77 td_err=1
78 return
79 fi
80 }
81 do_topdown_group_test "{slots,topdown-retiring}" "events not supported"
82 do_topdown_group_test "{instructions,r400,r8000}" "raw format slots not reordered first"
83 filler_events=("instructions" "cycles"
84 "context-switches" "faults")
85 for ((i = 0; i < ${#filler_events[@]}; i+=2))
86 do
87 filler1=${filler_events[i]}
88 filler2=${filler_events[i+1]}
89 do_topdown_group_test "$filler1,topdown-retiring,slots" \
90 "slots not reordered first in no-group case"
91 do_topdown_group_test "slots,$filler1,topdown-retiring" \
92 "topdown metrics event not reordered in no-group case"
93 do_topdown_group_test "{$filler1,topdown-retiring,slots}" \
94 "slots not reordered first in single group case"
95 do_topdown_group_test "{$filler1,slots},topdown-retiring" \
96 "topdown metrics event not move into slots group"
97 do_topdown_group_test "topdown-retiring,{$filler1,slots}" \
98 "topdown metrics event not move into slots group last"
99 do_topdown_group_test "{$filler1,slots},{topdown-retiring}" \
100 "topdown metrics group not merge into slots group"
101 do_topdown_group_test "{topdown-retiring},{$filler1,slots}" \
102 "topdown metrics group not merge into slots group last"
103 do_topdown_group_test "{$filler1,slots},$filler2,topdown-retiring" \
104 "non-adjacent topdown metrics group not move into slots group"
105 do_topdown_group_test "$filler2,topdown-retiring,{$filler1,slots}" \
106 "non-adjacent topdown metrics group not move into slots group last"
107 do_topdown_group_test "{$filler1,slots},{$filler2,topdown-retiring}" \
108 "metrics group not merge into slots group"
109 do_topdown_group_test "{$filler1,topdown-retiring},{$filler2,slots}" \
110 "metrics group not merge into slots group last"
111 done
112 if test "$td_err" -eq 0
113 then
114 echo "Topdown event group test [Success]"
115 else
116 err="$td_err"
117 fi
118}
119
120test_topdown_weak_groups() {
121 # Weak groups break if the perf_event_open of multiple grouped events
122 # fails. Breaking a topdown group causes the events to fail. Test a very large
123 # grouping to see that the topdown events aren't broken out.
124 echo "Topdown weak groups test"
125 ok_grouping="{slots,topdown-bad-spec,topdown-be-bound,topdown-fe-bound,topdown-retiring},branch-instructions,branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,mem-loads,mem-stores,ref-cycles,cache-misses,cache-references"
126 if ! perf stat --no-merge -e "$ok_grouping" true > /dev/null 2>&1
127 then
128 echo "Topdown weak groups test [Skipped event parsing failed]"
129 return
130 fi
131 group_needs_break="{slots,topdown-bad-spec,topdown-be-bound,topdown-fe-bound,topdown-retiring,branch-instructions,branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,mem-loads,mem-stores,ref-cycles,cache-misses,cache-references}:W"
132 if perf stat --no-merge -e "$group_needs_break" true 2>&1 | grep -E -q "<not supported>"
133 then
134 echo "Topdown weak groups test [Failed events not supported]"
135 err=1
136 return
137 fi
138 echo "Topdown weak groups test [Success]"
139}
140
141test_cputype() {
142 # Test --cputype argument.
143 echo "cputype test"
144
145 # Bogus PMU should fail.
146 if perf stat --cputype="123" -e instructions true > /dev/null 2>&1
147 then
148 echo "cputype test [Bogus PMU didn't fail]"
149 err=1
150 return
151 fi
152
153 # Find a known PMU for cputype.
154 pmu=""
155 devs="/sys/bus/event_source/devices"
156 for i in $devs/cpu $devs/cpu_atom $devs/armv8_pmuv3_0 $devs/armv8_cortex_*
157 do
158 i_base=$(basename "$i")
159 if test -d "$i"
160 then
161 pmu="$i_base"
162 break
163 fi
164 if perf stat -e "$i_base/instructions/" true > /dev/null 2>&1
165 then
166 pmu="$i_base"
167 break
168 fi
169 done
170 if test "x$pmu" = "x"
171 then
172 echo "cputype test [Skipped known PMU not found]"
173 return
174 fi
175
176 # Test running with cputype produces output.
177 if ! perf stat --cputype="$pmu" -e instructions true 2>&1 | grep -E -q "instructions"
178 then
179 echo "cputype test [Failed count missed with given filter]"
180 err=1
181 return
182 fi
183 echo "cputype test [Success]"
184}
185
186test_hybrid() {
187 # Test the default stat command on hybrid devices opens one cycles event for
188 # each CPU type.
189 echo "hybrid test"
190
191 # Count the number of core PMUs, assume minimum of 1
192 pmus=$(ls /sys/bus/event_source/devices/*/cpus 2>/dev/null | wc -l)
193 if [ "$pmus" -lt 1 ]
194 then
195 pmus=1
196 fi
197
198 # Run default Perf stat
199 cycles_events=$(perf stat -- true 2>&1 | grep -E "/cycles/[uH]*| cycles[:uH]* " -c)
200
201 # The expectation is that default output will have a cycles events on each
202 # hybrid PMU. In situations with no cycles PMU events, like virtualized, this
203 # can fall back to task-clock and so the end count may be 0. Fail if neither
204 # condition holds.
205 if [ "$pmus" -ne "$cycles_events" ] && [ "0" -ne "$cycles_events" ]
206 then
207 echo "hybrid test [Found $pmus PMUs but $cycles_events cycles events. Failed]"
208 err=1
209 return
210 fi
211 echo "hybrid test [Success]"
212}
213
214test_default_stat
215test_stat_record_report
216test_stat_record_script
217test_stat_repeat_weak_groups
218test_topdown_groups
219test_topdown_weak_groups
220test_cputype
221test_hybrid
222exit $err