Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#!/bin/sh
2# perf record tests
3# SPDX-License-Identifier: GPL-2.0
4
5set -e
6
7shelldir=$(dirname "$0")
8# shellcheck source=lib/waiting.sh
9. "${shelldir}"/lib/waiting.sh
10
11# shellcheck source=lib/perf_has_symbol.sh
12. "${shelldir}"/lib/perf_has_symbol.sh
13
14testsym="test_loop"
15
16skip_test_missing_symbol ${testsym}
17
18err=0
19perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
20testprog="perf test -w thloop"
21cpu_pmu_dir="/sys/bus/event_source/devices/cpu*"
22br_cntr_file="/caps/branch_counter_nr"
23br_cntr_output="branch stack counters"
24
25cleanup() {
26 rm -rf "${perfdata}"
27 rm -rf "${perfdata}".old
28
29 trap - EXIT TERM INT
30}
31
32trap_cleanup() {
33 cleanup
34 exit 1
35}
36trap trap_cleanup EXIT TERM INT
37
38test_per_thread() {
39 echo "Basic --per-thread mode test"
40 if ! perf record -o /dev/null --quiet ${testprog} 2> /dev/null
41 then
42 echo "Per-thread record [Skipped event not supported]"
43 return
44 fi
45 if ! perf record --per-thread -o "${perfdata}" ${testprog} 2> /dev/null
46 then
47 echo "Per-thread record [Failed record]"
48 err=1
49 return
50 fi
51 if ! perf report -i "${perfdata}" -q | grep -q "${testsym}"
52 then
53 echo "Per-thread record [Failed missing output]"
54 err=1
55 return
56 fi
57
58 # run the test program in background (for 30 seconds)
59 ${testprog} 30 &
60 TESTPID=$!
61
62 rm -f "${perfdata}"
63
64 wait_for_threads ${TESTPID} 2
65 perf record -p "${TESTPID}" --per-thread -o "${perfdata}" sleep 1 2> /dev/null
66 kill ${TESTPID}
67
68 if [ ! -e "${perfdata}" ]
69 then
70 echo "Per-thread record [Failed record -p]"
71 err=1
72 return
73 fi
74 if ! perf report -i "${perfdata}" -q | grep -q "${testsym}"
75 then
76 echo "Per-thread record [Failed -p missing output]"
77 err=1
78 return
79 fi
80
81 echo "Basic --per-thread mode test [Success]"
82}
83
84test_register_capture() {
85 echo "Register capture test"
86 if ! perf list | grep -q 'br_inst_retired.near_call'
87 then
88 echo "Register capture test [Skipped missing event]"
89 return
90 fi
91 if ! perf record --intr-regs=\? 2>&1 | grep -q 'available registers: AX BX CX DX SI DI BP SP IP FLAGS CS SS R8 R9 R10 R11 R12 R13 R14 R15'
92 then
93 echo "Register capture test [Skipped missing registers]"
94 return
95 fi
96 if ! perf record -o - --intr-regs=di,r8,dx,cx -e br_inst_retired.near_call \
97 -c 1000 --per-thread ${testprog} 2> /dev/null \
98 | perf script -F ip,sym,iregs -i - 2> /dev/null \
99 | grep -q "DI:"
100 then
101 echo "Register capture test [Failed missing output]"
102 err=1
103 return
104 fi
105 echo "Register capture test [Success]"
106}
107
108test_system_wide() {
109 echo "Basic --system-wide mode test"
110 if ! perf record -aB --synth=no -o "${perfdata}" ${testprog} 2> /dev/null
111 then
112 echo "System-wide record [Skipped not supported]"
113 return
114 fi
115 if ! perf report -i "${perfdata}" -q | grep -q "${testsym}"
116 then
117 echo "System-wide record [Failed missing output]"
118 err=1
119 return
120 fi
121 if ! perf record -aB --synth=no -e cpu-clock,cs --threads=cpu \
122 -o "${perfdata}" ${testprog} 2> /dev/null
123 then
124 echo "System-wide record [Failed record --threads option]"
125 err=1
126 return
127 fi
128 if ! perf report -i "${perfdata}" -q | grep -q "${testsym}"
129 then
130 echo "System-wide record [Failed --threads missing output]"
131 err=1
132 return
133 fi
134 echo "Basic --system-wide mode test [Success]"
135}
136
137test_workload() {
138 echo "Basic target workload test"
139 if ! perf record -o "${perfdata}" ${testprog} 2> /dev/null
140 then
141 echo "Workload record [Failed record]"
142 err=1
143 return
144 fi
145 if ! perf report -i "${perfdata}" -q | grep -q "${testsym}"
146 then
147 echo "Workload record [Failed missing output]"
148 err=1
149 return
150 fi
151 if ! perf record -e cpu-clock,cs --threads=package \
152 -o "${perfdata}" ${testprog} 2> /dev/null
153 then
154 echo "Workload record [Failed record --threads option]"
155 err=1
156 return
157 fi
158 if ! perf report -i "${perfdata}" -q | grep -q "${testsym}"
159 then
160 echo "Workload record [Failed --threads missing output]"
161 err=1
162 return
163 fi
164 echo "Basic target workload test [Success]"
165}
166
167test_branch_counter() {
168 echo "Basic branch counter test"
169 # Check if the branch counter feature is supported
170 for dir in $cpu_pmu_dir
171 do
172 if [ ! -e "$dir$br_cntr_file" ]
173 then
174 echo "branch counter feature not supported on all core PMUs ($dir) [Skipped]"
175 return
176 fi
177 done
178 if ! perf record -o "${perfdata}" -j any,counter ${testprog} 2> /dev/null
179 then
180 echo "Basic branch counter test [Failed record]"
181 err=1
182 return
183 fi
184 if ! perf report -i "${perfdata}" -D -q | grep -q "$br_cntr_output"
185 then
186 echo "Basic branch record test [Failed missing output]"
187 err=1
188 return
189 fi
190 echo "Basic branch counter test [Success]"
191}
192
193test_per_thread
194test_register_capture
195test_system_wide
196test_workload
197test_branch_counter
198
199cleanup
200exit $err