diff options
Diffstat (limited to 'tools/perf/tests/shell/test_brstack.sh')
-rwxr-xr-x | tools/perf/tests/shell/test_brstack.sh | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/tools/perf/tests/shell/test_brstack.sh b/tools/perf/tests/shell/test_brstack.sh new file mode 100755 index 0000000000..09908d71c9 --- /dev/null +++ b/tools/perf/tests/shell/test_brstack.sh @@ -0,0 +1,76 @@ +#!/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 +} + +trap cleanup EXIT TERM INT + +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() { + test_filter_filter=$1 + test_filter_expect=$2 + + echo "Testing branch stack filtering permutation ($test_filter_filter,$test_filter_expect)" + + perf record -o $TMPDIR/perf.data --branch-filter $test_filter_filter,save_type,u -- ${TESTPROG} > /dev/null 2>&1 + perf script -i $TMPDIR/perf.data --fields brstack | xargs -n1 > $TMPDIR/perf.script + + # fail if we find any branch type that doesn't match any of the expected ones + # also consider UNKNOWN branch types (-) + if grep -E -vm1 "^[^ ]*/($test_filter_expect|-|( *))/.*$" $TMPDIR/perf.script; then + 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" |