diff --git a/tools/perf/tests/shell/stat_bpf_counters.sh b/tools/perf/tests/shell/stat_bpf_counters.sh
index 35463358b273..11de77ee38ad 100755
--- a/tools/perf/tests/shell/stat_bpf_counters.sh
+++ b/tools/perf/tests/shell/stat_bpf_counters.sh
@@ -4,21 +4,26 @@
 
 set -e
 
-workload="perf test -w sqrtloop"
+# 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 }')
 
-# check whether $2 is within +/- 20% of $1
+# check whether $2 is within +/- 15% of $1
 compare_number()
 {
 	first_num=$1
 	second_num=$2
 
-	# upper bound is first_num * 120%
-	upper=$(expr $first_num + $first_num / 5 )
-	# lower bound is first_num * 80%
-	lower=$(expr $first_num - $first_num / 5 )
+	# upper bound is first_num * 115%
+	upper=$(expr $first_num + $first_num / 20 \* 3 )
+	# lower bound is first_num * 85%
+	lower=$(expr $first_num - $first_num / 20 \* 3 )
 
 	if [ $second_num -gt $upper ] || [ $second_num -lt $lower ]; then
-		echo "The difference between $first_num and $second_num are greater than 20%."
+		echo "The difference between $first_num and $second_num are greater than 15%."
 		exit 1
 	fi
 }
@@ -41,11 +46,12 @@ check_counts()
 test_bpf_counters()
 {
 	printf "Testing --bpf-counters "
-	base_instructions=$(perf stat --no-big-num -e instructions -- $workload 2>&1 | \
+	base_instructions=$(perf stat --no-big-num -e instructions:u -- "${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 -- $workload  2>&1 | \
+	bpf_instructions=$(perf stat --no-big-num --bpf-counters -e instructions:u \
+				-- "${workload[@]}"  2>&1 | \
 				awk -v i=0 -v c=0 '/instructions/ { \
 					if ($1 != "<not") { i++; c += $1 } \
 				} END { if (i > 0) printf "%.0f", c; else print "<not" }')
@@ -57,7 +63,9 @@ test_bpf_counters()
 test_bpf_modifier()
 {
 	printf "Testing bpf event modifier "
-	stat_output=$(perf stat --no-big-num -e instructions/name=base_instructions/,instructions/name=bpf_instructions/b -- $workload 2>&1)
+	stat_output=$(perf stat --no-big-num \
+		-e instructions/name=base_instructions/u,instructions/name=bpf_instructions/bu \
+		-- "${workload[@]}" 2>&1)
 	base_instructions=$(echo "$stat_output"| \
 				awk -v i=0 -v c=0 '/base_instructions/ { \
 					if ($1 != "<not") { i++; c += $1 } \