1#!/bin/sh
 2# perf record sideband tests
 3# SPDX-License-Identifier: GPL-2.0
 4
 5set -e
 6
 7err=0
 8perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
 9
10cleanup()
11{
12    rm -rf ${perfdata}
13    trap - EXIT TERM INT
14}
15
16trap_cleanup()
17{
18    cleanup
19    exit 1
20}
21trap trap_cleanup EXIT TERM INT
22
23can_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
35test_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
55test_system_wide_tracking
56
57cleanup
58exit $err