[PATCH 6.12 0940/1102] Revert "perf tests: Fix flakiness in BPF counters test on hybrid systems"

@@ -4,26 +4,21 @@
 
 set -e
 
-# Get the first allowed CPU
-CPU=$(taskset -c -p $$ | awk -F': ' '{print $2}' | awk -F'[,-]' '{print $1}')
-if [ -z "$CPU" ]; then
-	CPU=0
-fi
-workload=(taskset -c "$CPU" awk 'BEGIN { for (i=0; i<10000000; i++) sum+=i }')
+workload="perf test -w sqrtloop"
 
-# check whether $2 is within +/- 15% of $1
+# check whether $2 is within +/- 20% of $1
 compare_number()
 {
 	first_num=$1
 	second_num=$2
 
-	# upper bound is first_num * 115%
-	upper=$(expr $first_num + $first_num / 20 \* 3 )
-	# lower bound is first_num * 85%
-	lower=$(expr $first_num - $first_num / 20 \* 3 )
+	# upper bound is first_num * 120%
+	upper=$(expr $first_num + $first_num / 5 )
+	# lower bound is first_num * 80%
+	lower=$(expr $first_num - $first_num / 5 )
 
 	if [ $second_num -gt $upper ] || [ $second_num -lt $lower ]; then
-		echo "The difference between $first_num and $second_num are greater than 15%."
+		echo "The difference between $first_num and $second_num are greater than 20%."
 		exit 1
 	fi
 }

@@ -46,12 +41,11 @@ check_counts()
 test_bpf_counters()
 {
 	printf "Testing --bpf-counters "
-	base_instructions=$(perf stat --no-big-num -e instructions:u -- "${workload[@]}" 2>&1 | \
+	base_instructions=$(perf stat --no-big-num -e instructions -- $workload 2>&1 | \
 				awk -v i=0 -v c=0 '/instructions/ { \
 					if ($1 != "<not") { i++; c += $1 } \
 				} END { if (i > 0) printf "%.0f", c; else print "<not" }')
-	bpf_instructions=$(perf stat --no-big-num --bpf-counters -e instructions:u \
-				-- "${workload[@]}"  2>&1 | \
+	bpf_instructions=$(perf stat --no-big-num --bpf-counters -e instructions -- $workload  2>&1 | \
 				awk -v i=0 -v c=0 '/instructions/ { \
 					if ($1 != "<not") { i++; c += $1 } \
 				} END { if (i > 0) printf "%.0f", c; else print "<not" }')

@@ -63,9 +57,7 @@ test_bpf_counters()
 test_bpf_modifier()
 {
 	printf "Testing bpf event modifier "
-	stat_output=$(perf stat --no-big-num \
-		-e instructions/name=base_instructions/u,instructions/name=bpf_instructions/bu \
-		-- "${workload[@]}" 2>&1)
+	stat_output=$(perf stat --no-big-num -e instructions/name=base_instructions/,instructions/name=bpf_instructions/b -- $workload 2>&1)
 	base_instructions=$(echo "$stat_output"| \
 				awk -v i=0 -v c=0 '/base_instructions/ { \
 					if ($1 != "<not") { i++; c += $1 } \