2023-08-30 17:31:07 +02:00
|
|
|
#!/bin/sh
|
|
|
|
|
# Check branch stack sampling
|
|
|
|
|
|
|
|
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
|
|
|
# German Gomez <german.gomez@arm.com>, 2022
|
|
|
|
|
|
|
|
|
|
# skip the test if the hardware doesn't support branch stack sampling
|
|
|
|
|
# and if the architecture doesn't support filter types: any,save_type,u
|
|
|
|
|
if ! perf record -o- --no-buildid --branch-filter any,save_type,u -- true > /dev/null 2>&1 ; then
|
|
|
|
|
echo "skip: system doesn't support filter types: any,save_type,u"
|
|
|
|
|
exit 2
|
|
|
|
|
fi
|
|
|
|
|
|
|
|
|
|
TMPDIR=$(mktemp -d /tmp/__perf_test.program.XXXXX)
|
|
|
|
|
TESTPROG="perf test -w brstack"
|
|
|
|
|
|
|
|
|
|
cleanup() {
|
|
|
|
|
rm -rf $TMPDIR
|
|
|
|
|
}
|
|
|
|
|
|
2023-10-24 12:59:35 +02:00
|
|
|
trap cleanup EXIT TERM INT
|
2023-08-30 17:31:07 +02:00
|
|
|
|
|
|
|
|
test_user_branches() {
|
|
|
|
|
echo "Testing user branch stack sampling"
|
|
|
|
|
|
|
|
|
|
perf record -o $TMPDIR/perf.data --branch-filter any,save_type,u -- ${TESTPROG} > /dev/null 2>&1
|
|
|
|
|
perf script -i $TMPDIR/perf.data --fields brstacksym | xargs -n1 > $TMPDIR/perf.script
|
|
|
|
|
|
|
|
|
|
# example of branch entries:
|
|
|
|
|
# brstack_foo+0x14/brstack_bar+0x40/P/-/-/0/CALL
|
|
|
|
|
|
|
|
|
|
set -x
|
|
|
|
|
grep -E -m1 "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/IND_CALL/.*$" $TMPDIR/perf.script
|
|
|
|
|
grep -E -m1 "^brstack_foo\+[^ ]*/brstack_bar\+[^ ]*/CALL/.*$" $TMPDIR/perf.script
|
|
|
|
|
grep -E -m1 "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/CALL/.*$" $TMPDIR/perf.script
|
|
|
|
|
grep -E -m1 "^brstack_bench\+[^ ]*/brstack_bar\+[^ ]*/CALL/.*$" $TMPDIR/perf.script
|
|
|
|
|
grep -E -m1 "^brstack_bar\+[^ ]*/brstack_foo\+[^ ]*/RET/.*$" $TMPDIR/perf.script
|
|
|
|
|
grep -E -m1 "^brstack_foo\+[^ ]*/brstack_bench\+[^ ]*/RET/.*$" $TMPDIR/perf.script
|
|
|
|
|
grep -E -m1 "^brstack_bench\+[^ ]*/brstack_bench\+[^ ]*/COND/.*$" $TMPDIR/perf.script
|
|
|
|
|
grep -E -m1 "^brstack\+[^ ]*/brstack\+[^ ]*/UNCOND/.*$" $TMPDIR/perf.script
|
|
|
|
|
set +x
|
|
|
|
|
|
|
|
|
|
# some branch types are still not being tested:
|
|
|
|
|
# IND COND_CALL COND_RET SYSCALL SYSRET IRQ SERROR NO_TX
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
# first argument <arg0> is the argument passed to "--branch-stack <arg0>,save_type,u"
|
|
|
|
|
# second argument are the expected branch types for the given filter
|
|
|
|
|
test_filter() {
|
2023-10-24 12:59:35 +02:00
|
|
|
test_filter_filter=$1
|
|
|
|
|
test_filter_expect=$2
|
2023-08-30 17:31:07 +02:00
|
|
|
|
2023-10-24 12:59:35 +02:00
|
|
|
echo "Testing branch stack filtering permutation ($test_filter_filter,$test_filter_expect)"
|
2023-08-30 17:31:07 +02:00
|
|
|
|
2023-10-24 12:59:35 +02:00
|
|
|
perf record -o $TMPDIR/perf.data --branch-filter $test_filter_filter,save_type,u -- ${TESTPROG} > /dev/null 2>&1
|
2023-08-30 17:31:07 +02:00
|
|
|
perf script -i $TMPDIR/perf.data --fields brstack | xargs -n1 > $TMPDIR/perf.script
|
|
|
|
|
|
|
|
|
|
# fail if we find any branch type that doesn't match any of the expected ones
|
|
|
|
|
# also consider UNKNOWN branch types (-)
|
2023-10-24 12:59:35 +02:00
|
|
|
if grep -E -vm1 "^[^ ]*/($test_filter_expect|-|( *))/.*$" $TMPDIR/perf.script; then
|
2023-08-30 17:31:07 +02:00
|
|
|
return 1
|
|
|
|
|
fi
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
set -e
|
|
|
|
|
|
|
|
|
|
test_user_branches
|
|
|
|
|
|
|
|
|
|
test_filter "any_call" "CALL|IND_CALL|COND_CALL|SYSCALL|IRQ"
|
|
|
|
|
test_filter "call" "CALL|SYSCALL"
|
|
|
|
|
test_filter "cond" "COND"
|
|
|
|
|
test_filter "any_ret" "RET|COND_RET|SYSRET|ERET"
|
|
|
|
|
|
|
|
|
|
test_filter "call,cond" "CALL|SYSCALL|COND"
|
|
|
|
|
test_filter "any_call,cond" "CALL|IND_CALL|COND_CALL|IRQ|SYSCALL|COND"
|
|
|
|
|
test_filter "cond,any_call,any_ret" "COND|CALL|IND_CALL|COND_CALL|SYSCALL|IRQ|RET|COND_RET|SYSRET|ERET"
|
