summaryrefslogtreecommitdiff
path: root/tools/perf/tests/shell/test_intel_pt.sh
blob: 4609a24c9340005247c969d3fcf27b8af2ddae51 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
#!/bin/sh
# Miscellaneous Intel PT testing
# SPDX-License-Identifier: GPL-2.0

set -e

# Skip if no Intel PT
perf list | grep -q 'intel_pt//' || exit 2

shelldir=$(dirname "$0")
. "${shelldir}"/lib/waiting.sh

skip_cnt=0
ok_cnt=0
err_cnt=0

temp_dir=$(mktemp -d /tmp/perf-test-intel-pt-sh.XXXXXXXXXX)

tmpfile="${temp_dir}/tmp-perf.data"
perfdatafile="${temp_dir}/test-perf.data"
outfile="${temp_dir}/test-out.txt"
errfile="${temp_dir}/test-err.txt"
workload="${temp_dir}/workload"
awkscript="${temp_dir}/awkscript"

cleanup()
{
	trap - EXIT TERM INT
	sane=$(echo "${temp_dir}" | cut -b 1-26)
	if [ "${sane}" = "/tmp/perf-test-intel-pt-sh" ] ; then
		echo "--- Cleaning up ---"
		rm -f "${temp_dir}/"*
		rmdir "${temp_dir}"
	fi
}

trap_cleanup()
{
	cleanup
	exit 1
}

trap trap_cleanup EXIT TERM INT

have_workload=false
cat << _end_of_file_ | /usr/bin/cc -o "${workload}" -xc - -pthread && have_workload=true
#include <time.h>
#include <pthread.h>

void work(void) {
	struct timespec tm = {
		.tv_nsec = 1000000,
	};
	int i;

	/* Run for about 30 seconds */
	for (i = 0; i < 30000; i++)
		nanosleep(&tm, NULL);
}

void *threadfunc(void *arg) {
	work();
	return NULL;
}

int main(void) {
	pthread_t th;

	pthread_create(&th, NULL, threadfunc, NULL);
	work();
	pthread_join(th, NULL);
	return 0;
}
_end_of_file_

can_cpu_wide()
{
	echo "Checking for CPU-wide recording on CPU $1"
	if ! perf record -o "${tmpfile}" -B -N --no-bpf-event -e dummy:u -C "$1" true >/dev/null 2>&1 ; then
		echo "No so skipping"
		return 2
	fi
	echo OK
	return 0
}

test_system_wide_side_band()
{
	echo "--- Test system-wide sideband ---"

	# Need CPU 0 and CPU 1
	can_cpu_wide 0 || return $?
	can_cpu_wide 1 || return $?

	# Record on CPU 0 a task running on CPU 1
	perf record -B -N --no-bpf-event -o "${perfdatafile}" -e intel_pt//u -C 0 -- taskset --cpu-list 1 uname

	# Should get MMAP events from CPU 1 because they can be needed to decode
	mmap_cnt=$(perf script -i "${perfdatafile}" --no-itrace --show-mmap-events -C 1 2>/dev/null | grep -c MMAP)

	if [ "${mmap_cnt}" -gt 0 ] ; then
		echo OK
		return 0
	fi

	echo "Failed to record MMAP events on CPU 1 when tracing CPU 0"
	return 1
}

can_kernel()
{
	perf record -o "${tmpfile}" -B -N --no-bpf-event -e dummy:k true >/dev/null 2>&1 || return 2
	return 0
}

test_per_thread()
{
	k="$1"
	desc="$2"

	echo "--- Test per-thread ${desc}recording ---"

	if ! $have_workload ; then
		echo "No workload, so skipping"
		return 2
	fi

	if [ "${k}" = "k" ] ; then
		can_kernel || return 2
	fi

	cat <<- "_end_of_file_" > "${awkscript}"
	BEGIN {
		s = "[ ]*"
		u = s"[0-9]+"s
		d = s"[0-9-]+"s
		x = s"[0-9a-fA-FxX]+"s
		mmapping = "idx"u": mmapping fd"u
		set_output = "idx"u": set output fd"u"->"u
		perf_event_open = "sys_perf_event_open: pid"d"cpu"d"group_fd"d"flags"x"="u
	}

	/perf record opening and mmapping events/ {
		if (!done)
			active = 1
	}

	/perf record done opening and mmapping events/ {
		active = 0
		done = 1
	}

	$0 ~ perf_event_open && active {
		match($0, perf_event_open)
		$0 = substr($0, RSTART, RLENGTH)
		pid = $3
		cpu = $5
		fd = $11
		print "pid " pid " cpu " cpu " fd " fd " : " $0
		fd_array[fd] = fd
		pid_array[fd] = pid
		cpu_array[fd] = cpu
	}

	$0 ~ mmapping && active  {
		match($0, mmapping)
		$0 = substr($0, RSTART, RLENGTH)
		fd = $5
		print "fd " fd " : " $0
		if (fd in fd_array) {
			mmap_array[fd] = 1
		} else {
			print "Unknown fd " fd
			exit 1
		}
	}

	$0 ~ set_output && active {
		match($0, set_output)
		$0 = substr($0, RSTART, RLENGTH)
		fd = $6
		fd_to = $8
		print "fd " fd " fd_to " fd_to " : " $0
		if (fd in fd_array) {
			if (fd_to in fd_array) {
				set_output_array[fd] = fd_to
			} else {
				print "Unknown fd " fd_to
				exit 1
			}
		} else {
			print "Unknown fd " fd
			exit 1
		}
	}

	END {
		print "Checking " length(fd_array) " fds"
		for (fd in fd_array) {
			if (fd in mmap_array) {
				pid = pid_array[fd]
				if (pid != -1) {
					if (pid in pids) {
						print "More than 1 mmap for PID " pid
						exit 1
					}
					pids[pid] = 1
				}
				cpu = cpu_array[fd]
				if (cpu != -1) {
					if (cpu in cpus) {
						print "More than 1 mmap for CPU " cpu
						exit 1
					}
					cpus[cpu] = 1
				}
			} else if (!(fd in set_output_array)) {
				print "No mmap for fd " fd
				exit 1
			}
		}
		n = length(pids)
		if (n != thread_cnt) {
			print "Expected " thread_cnt " per-thread mmaps - found " n
			exit 1
		}
	}
	_end_of_file_

	$workload &
	w1=$!
	$workload &
	w2=$!
	echo "Workload PIDs are $w1 and $w2"
	wait_for_threads ${w1} 2
	wait_for_threads ${w2} 2

	perf record -B -N --no-bpf-event -o "${perfdatafile}" -e intel_pt//u"${k}" -vvv --per-thread -p "${w1},${w2}" 2>"${errfile}" >"${outfile}" &
	ppid=$!
	echo "perf PID is $ppid"
	wait_for_perf_to_start ${ppid} "${errfile}" || return 1

	kill ${w1}
	wait_for_process_to_exit ${w1} || return 1
	is_running ${ppid} || return 1

	kill ${w2}
	wait_for_process_to_exit ${w2} || return 1
	wait_for_process_to_exit ${ppid} || return 1

	awk -v thread_cnt=4 -f "${awkscript}" "${errfile}" || return 1

	echo OK
	return 0
}

count_result()
{
	if [ "$1" -eq 2 ] ; then
		skip_cnt=$((skip_cnt + 1))
		return
	fi
	if [ "$1" -eq 0 ] ; then
		ok_cnt=$((ok_cnt + 1))
		return
	fi
	err_cnt=$((err_cnt + 1))
}

ret=0
test_system_wide_side_band || ret=$? ; count_result $ret ; ret=0
test_per_thread "" "" || ret=$? ; count_result $ret ; ret=0
test_per_thread "k" "(incl. kernel) " || ret=$? ; count_result $ret ; ret=0

cleanup

echo "--- Done ---"

if [ ${err_cnt} -gt 0 ] ; then
	exit 1
fi

if [ ${ok_cnt} -gt 0 ] ; then
	exit 0
fi

exit 2