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f3061d5267
On continuous testing the perf script output can be empty, or nearly empty, causing tr/grep to exit and due to "set -e" the test traps and fails. Add some empty file handling that sets the test to skip and make grep and other text rewriting failures non-fatal by adding "|| true". Committer testing: root@number:~# grep -m1 "model name" /proc/cpuinfo model name : AMD Ryzen 9 9950X3D 16-Core Processor root@number:~# perf test "Check branch stack sampling" 104: Check branch stack sampling : Ok root@number:~# root@number:~# perf test -vvvvvvv "Check branch stack sampling" 104: Check branch stack sampling: --- start --- test child forked, pid 396047 142d22-142da0 l brstack_bench perf does have symbol 'brstack_bench' Testing user branch stack sampling Testing branch stack filtering permutation (any_call,CALL|IND_CALL|COND_CALL|SYSCALL|IRQ) Testing branch stack filtering permutation (call,CALL|SYSCALL) Testing branch stack filtering permutation (cond,COND) Testing branch stack filtering permutation (any_ret,RET|COND_RET|SYSRET|ERET) Testing branch stack filtering permutation (call,cond,CALL|SYSCALL|COND) Testing branch stack filtering permutation (any_call,cond,CALL|IND_CALL|COND_CALL|IRQ|SYSCALL|COND) Testing branch stack filtering permutation (cond,any_call,any_ret,COND|CALL|IND_CALL|COND_CALL|SYSCALL|IRQ|RET|COND_RET|SYSRET|ERET) ---- end(0) ---- 104: Check branch stack sampling : Ok root@number:~# Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: German Gomez <german.gomez@arm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20250318161639.34446-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
114 lines
3.4 KiB
Bash
Executable file
114 lines
3.4 KiB
Bash
Executable file
#!/bin/bash
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# Check branch stack sampling
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# SPDX-License-Identifier: GPL-2.0
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# German Gomez <german.gomez@arm.com>, 2022
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shelldir=$(dirname "$0")
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# shellcheck source=lib/perf_has_symbol.sh
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. "${shelldir}"/lib/perf_has_symbol.sh
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# skip the test if the hardware doesn't support branch stack sampling
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# and if the architecture doesn't support filter types: any,save_type,u
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if ! perf record -o- --no-buildid --branch-filter any,save_type,u -- true > /dev/null 2>&1 ; then
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echo "skip: system doesn't support filter types: any,save_type,u"
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exit 2
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fi
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skip_test_missing_symbol brstack_bench
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err=0
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TMPDIR=$(mktemp -d /tmp/__perf_test.program.XXXXX)
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TESTPROG="perf test -w brstack"
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cleanup() {
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rm -rf $TMPDIR
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trap - EXIT TERM INT
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}
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trap_cleanup() {
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set +e
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echo "Unexpected signal in ${FUNCNAME[1]}"
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cleanup
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exit 1
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}
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trap trap_cleanup EXIT TERM INT
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test_user_branches() {
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echo "Testing user branch stack sampling"
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perf record -o "$TMPDIR/perf.data" --branch-filter any,save_type,u -- ${TESTPROG} > "$TMPDIR/record.txt" 2>&1
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perf script -i "$TMPDIR/perf.data" --fields brstacksym > "$TMPDIR/perf.script"
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# example of branch entries:
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# brstack_foo+0x14/brstack_bar+0x40/P/-/-/0/CALL
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expected=(
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"^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/IND_CALL/.*$"
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"^brstack_foo\+[^ ]*/brstack_bar\+[^ ]*/CALL/.*$"
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"^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/CALL/.*$"
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"^brstack_bench\+[^ ]*/brstack_bar\+[^ ]*/CALL/.*$"
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"^brstack_bar\+[^ ]*/brstack_foo\+[^ ]*/RET/.*$"
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"^brstack_foo\+[^ ]*/brstack_bench\+[^ ]*/RET/.*$"
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"^brstack_bench\+[^ ]*/brstack_bench\+[^ ]*/COND/.*$"
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"^brstack\+[^ ]*/brstack\+[^ ]*/UNCOND/.*$"
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)
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for x in "${expected[@]}"
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do
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if ! tr -s ' ' '\n' < "$TMPDIR/perf.script" | grep -E -m1 -q "$x"
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then
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echo "Branches missing $x"
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err=1
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fi
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done
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# some branch types are still not being tested:
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# IND COND_CALL COND_RET SYSCALL SYSRET IRQ SERROR NO_TX
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}
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# first argument <arg0> is the argument passed to "--branch-stack <arg0>,save_type,u"
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# second argument are the expected branch types for the given filter
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test_filter() {
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test_filter_filter=$1
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test_filter_expect=$2
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echo "Testing branch stack filtering permutation ($test_filter_filter,$test_filter_expect)"
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perf record -o "$TMPDIR/perf.data" --branch-filter "$test_filter_filter,save_type,u" -- ${TESTPROG} > "$TMPDIR/record.txt" 2>&1
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perf script -i "$TMPDIR/perf.data" --fields brstack > "$TMPDIR/perf.script"
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# fail if we find any branch type that doesn't match any of the expected ones
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# also consider UNKNOWN branch types (-)
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if [ ! -s "$TMPDIR/perf.script" ]
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then
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echo "Empty script output"
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err=1
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return
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fi
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# Look for lines not matching test_filter_expect ignoring issues caused
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# by empty output
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tr -s ' ' '\n' < "$TMPDIR/perf.script" | grep '.' | \
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grep -E -vm1 "^[^ ]*/($test_filter_expect|-|( *))/.*$" \
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> "$TMPDIR/perf.script-filtered" || true
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if [ -s "$TMPDIR/perf.script-filtered" ]
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then
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echo "Unexpected branch filter in script output"
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cat "$TMPDIR/perf.script"
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err=1
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return
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fi
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}
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set -e
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test_user_branches
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test_filter "any_call" "CALL|IND_CALL|COND_CALL|SYSCALL|IRQ"
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test_filter "call" "CALL|SYSCALL"
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test_filter "cond" "COND"
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test_filter "any_ret" "RET|COND_RET|SYSRET|ERET"
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test_filter "call,cond" "CALL|SYSCALL|COND"
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test_filter "any_call,cond" "CALL|IND_CALL|COND_CALL|IRQ|SYSCALL|COND"
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test_filter "cond,any_call,any_ret" "COND|CALL|IND_CALL|COND_CALL|SYSCALL|IRQ|RET|COND_RET|SYSRET|ERET"
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cleanup
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exit $err
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