skip_if_no_mem_event() {
perf mem record -e list 2>&1 | grep -E -q 'available' && return 0
return 2
}
skip_if_no_mem_event || exit 2
skip_test_missing_symbol workload_datasym_buf1
TEST_PROGRAM="perf test -w datasym"
PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
ERR_FILE=$(mktemp /tmp/__perf_test.stderr.XXXXX)
check_result() { # The memory report format is as below: # 99.92% ... [.] workload_datasym_buf1+0x38
result=$(perf mem report -i ${PERF_DATA} -s symbol_daddr -q 2>&1 |
awk '/workload_datasym_buf1/ { print $4 }')
# Testing is failed if has no any sample for "workload_datasym_buf1"
[ -z "$result" ] && return 1
while IFS= read -r line; do # The "data1" and "data2" fields in structure # "workload_datasym_buf1" have offset "0x0" and "0x38", returns # failure if detect any other offset value. if [ "$line" != "workload_datasym_buf1+0x0" ] && \
[ "$line" != "workload_datasym_buf1+0x38" ]; then
return 1 fi done <<< "$result"
return 0
}
cleanup_files()
{ echo"Cleaning up files..." rm -f ${PERF_DATA}
}
trap cleanup_files exit term int
echo"Recording workload..."
is_amd=$(grep -E -c 'vendor_id.*AuthenticAMD' /proc/cpuinfo) if (($is_amd >= 1)); then
mem_events="$(perf mem record -v -e list 2>&1)" if ! [[ "$mem_events" =~ ^mem\-ldst.*ibs_op/(.*)/.*available ]]; then echo"ERROR: mem-ldst event is not matching"
exit 1 fi
# --ldlat on AMD: # o Zen4 and earlier uarch does not support ldlat # o Even on supported platforms, it's disabled (--ldlat=0) by default.
ldlat=${BASH_REMATCH[1]} if [[ -n $ldlat ]]; then if ! [[ "$ldlat" =~ ldlat=0 ]]; then echo"ERROR: ldlat not initialized to 0?"
exit 1 fi
mem_events="$(perf mem record -v --ldlat=150 -e list 2>&1)" if ! [[ "$mem_events" =~ ^mem-ldst.*ibs_op/ldlat=150/.*available ]]; then echo"ERROR: --ldlat not honored?"
exit 1 fi fi
# perf mem/c2c internally uses IBS PMU on AMD CPU which doesn't # support user/kernel filtering and per-process monitoring on older # kernels, spin program on specific CPU and test in per-CPU mode.
perf mem record -vvv -o ${PERF_DATA} -C 0 -- taskset -c 0 $TEST_PROGRAM 2>"${ERR_FILE}" else
perf mem record -vvv --all-user -o ${PERF_DATA} -- $TEST_PROGRAM 2>"${ERR_FILE}" fi
check_result
exit $?
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