1 #!/bin/sh
2 # perf record sideband tests
3 # SPDX-License-Identifier: GPL-2.0
4
5 set -e
6
7 err=0
8 perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
9
10 cleanup()
11 {
12 rm -rf ${perfdata}
13 trap - EXIT TERM INT
14 }
15
16 trap_cleanup()
17 {
18 cleanup
19 exit 1
20 }
21 trap trap_cleanup EXIT TERM INT
22
23 can_cpu_wide()
24 {
25 if ! perf record -o ${perfdata} -BN --no-bpf-event -C $1 true > /dev/null 2>&1
26 then
27 echo "record sideband test [Skipped cannot record cpu$1]"
28 err=2
29 fi
30
31 rm -f ${perfdata}
32 return $err
33 }
34
35 test_system_wide_tracking()
36 {
37 # Need CPU 0 and CPU 1
38 can_cpu_wide 0 || return 0
39 can_cpu_wide 1 || return 0
40
41 # Record on CPU 0 a task running on CPU 1
42 perf record -BN --no-bpf-event -o ${perfdata} -C 0 -- taskset --cpu-list 1 true
43
44 # Should get MMAP events from CPU 1
45 mmap_cnt=`perf script -i ${perfdata} --show-mmap-events -C 1 2>/dev/null | grep MMAP | wc -l`
46
47 if [ ${mmap_cnt} -gt 0 ] ; then
48 return 0
49 fi
50
51 echo "Failed to record MMAP events on CPU 1 when tracing CPU 0"
52 return 1
53 }
54
55 test_system_wide_tracking
56
57 cleanup
58 exit $err
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