Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#!/bin/bash
2# Test data symbol (exclusive)
3
4# SPDX-License-Identifier: GPL-2.0
5# Leo Yan <leo.yan@linaro.org>, 2022
6
7shelldir=$(dirname "$0")
8
9# shellcheck source=lib/perf_has_symbol.sh
10. "${shelldir}"/lib/perf_has_symbol.sh
11
12skip_if_no_mem_event() {
13 perf mem record -e list 2>&1 | grep -E -q 'available' && return 0
14 return 2
15}
16
17skip_if_no_mem_event || exit 2
18
19skip_test_missing_symbol workload_datasym_buf1
20
21TEST_PROGRAM="perf test -w datasym"
22PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
23ERR_FILE=$(mktemp /tmp/__perf_test.stderr.XXXXX)
24
25check_result() {
26 # The memory report format is as below:
27 # 99.92% ... [.] workload_datasym_buf1+0x38
28 result=$(perf mem report -i ${PERF_DATA} -s symbol_daddr -q 2>&1 |
29 awk '/workload_datasym_buf1/ { print $4 }')
30
31 # Testing is failed if has no any sample for "workload_datasym_buf1"
32 [ -z "$result" ] && return 1
33
34 while IFS= read -r line; do
35 # The "data1" and "data2" fields in structure
36 # "workload_datasym_buf1" have offset "0x0" and "0x38", returns
37 # failure if detect any other offset value.
38 if [ "$line" != "workload_datasym_buf1+0x0" ] && \
39 [ "$line" != "workload_datasym_buf1+0x38" ]; then
40 return 1
41 fi
42 done <<< "$result"
43
44 return 0
45}
46
47cleanup_files()
48{
49 echo "Cleaning up files..."
50 rm -f ${PERF_DATA}
51}
52
53trap cleanup_files exit term int
54
55echo "Recording workload..."
56
57is_amd=$(grep -E -c 'vendor_id.*AuthenticAMD' /proc/cpuinfo)
58if (($is_amd >= 1)); then
59 mem_events="$(perf mem record -v -e list 2>&1)"
60 if ! [[ "$mem_events" =~ ^mem\-ldst.*ibs_op/(.*)/.*available ]]; then
61 echo "ERROR: mem-ldst event is not matching"
62 exit 1
63 fi
64
65 # --ldlat on AMD:
66 # o Zen4 and earlier uarch does not support ldlat
67 # o Even on supported platforms, it's disabled (--ldlat=0) by default.
68 ldlat=${BASH_REMATCH[1]}
69 if [[ -n $ldlat ]]; then
70 if ! [[ "$ldlat" =~ ldlat=0 ]]; then
71 echo "ERROR: ldlat not initialized to 0?"
72 exit 1
73 fi
74
75 mem_events="$(perf mem record -v --ldlat=150 -e list 2>&1)"
76 if ! [[ "$mem_events" =~ ^mem-ldst.*ibs_op/ldlat=150/.*available ]]; then
77 echo "ERROR: --ldlat not honored?"
78 exit 1
79 fi
80 fi
81
82 # perf mem/c2c internally uses IBS PMU on AMD CPU which doesn't
83 # support user/kernel filtering and per-process monitoring on older
84 # kernels, spin program on specific CPU and test in per-CPU mode.
85 perf mem record -vvv -o ${PERF_DATA} -C 0 -- taskset -c 0 $TEST_PROGRAM 2>"${ERR_FILE}"
86else
87 perf mem record -vvv --all-user -o ${PERF_DATA} -- $TEST_PROGRAM 2>"${ERR_FILE}"
88fi
89
90check_result
91exit $?