1#!/bin/sh
 2# perf stat metrics (shadow stat) test
 3# SPDX-License-Identifier: GPL-2.0
 4
 5set -e
 6
 7THRESHOLD=0.015
 8
 9# skip if system-wide mode is forbidden
10perf stat -a true > /dev/null 2>&1 || exit 2
11
12# skip if on hybrid platform
13perf stat -a -e cycles sleep 1 2>&1 | grep -e cpu_core && exit 2
14
15test_global_aggr()
16{
17	perf stat -a --no-big-num -e cycles,instructions sleep 1  2>&1 | \
18	grep -e cycles -e instructions | \
19	while read num evt _ ipc rest
20	do
21		# skip not counted events
22		if [ "$num" = "<not" ]; then
23			continue
24		fi
25
26		# save cycles count
27		if [ "$evt" = "cycles" ]; then
28			cyc=$num
29			continue
30		fi
31
32		# skip if no cycles
33		if [ -z "$cyc" ]; then
34			continue
35		fi
36
37		# use printf for rounding and a leading zero
38		res=`echo $num $cyc | awk '{printf "%.2f", $1 / $2}'`
39		if [ "$ipc" != "$res" ]; then
40			# check the difference from the real result for FP imperfections
41			diff=`echo $ipc $res $THRESHOLD | \
42			awk '{x = ($1 - $2) < 0 ? ($2 - $1) : ($1 - $2); print (x > $3)}'`
43
44			if [ $diff -eq 1 ]; then
45				echo "IPC is different: $res != $ipc  ($num / $cyc)"
46				exit 1
47			fi
48
49			echo "Warning: Difference of IPC is under the threshold"
50		fi
51	done
52}
53
54test_no_aggr()
55{
56	perf stat -a -A --no-big-num -e cycles,instructions sleep 1  2>&1 | \
57	grep ^CPU | \
58	while read cpu num evt _ ipc rest
59	do
60		# skip not counted events
61		if [ "$num" = "<not" ]; then
62			continue
63		fi
64
65		# save cycles count
66		if [ "$evt" = "cycles" ]; then
67			results="$results $cpu:$num"
68			continue
69		fi
70
71		cyc=${results##* $cpu:}
72		cyc=${cyc%% *}
73
74		# skip if no cycles
75		if [ -z "$cyc" ]; then
76			continue
77		fi
78
79		# use printf for rounding and a leading zero
80		res=`echo $num $cyc | awk '{printf "%.2f", $1 / $2}'`
81		if [ "$ipc" != "$res" ]; then
82			# check difference from the real result for FP imperfections
83			diff=`echo $ipc $res $THRESHOLD | \
84			awk '{x = ($1 - $2) < 0 ? ($2 - $1) : ($1 - $2); print (x > $3)}'`
85
86			if [ $diff -eq 1 ]; then
87				echo "IPC is different: $res != $ipc  ($num / $cyc)"
88				exit 1
89			fi
90
91			echo "Warning: Difference of IPC is under the threshold"
92		fi
93	done
94}
95
96test_global_aggr
97test_no_aggr
98
99exit 0