diff --git a/ifs/ifs_common.sh b/ifs/ifs_common.sh
index ad7d6a10..5e06f42a 100755
--- a/ifs/ifs_common.sh
+++ b/ifs/ifs_common.sh
@@ -177,14 +177,14 @@ cpuid_check_atom() {
   cpu_num=$(grep -c "processor" /proc/cpuinfo)
   cpu_id=$((cpu_num - 1))
   # Check if CPU0 is ATOM
-  [[ $(taskset -c 0 "$cpu_check" 1a 0 0 0 a 29) ]] || {
+  taskset -c 0 "$cpu_check" 1a 0 0 0 a 29 && {
     test_print_trc "CPU0 CPUID(EAX=0x1a),EAX bit29 is 1:ATOM"
     IS_ATOM="$TRUE"
     return 0
   }
 
   # Check max CPU ID is ATOM
-  [[ $(taskset -c "$cpu_id" "$cpu_check" 1a 0 0 0 a 29) ]] || {
+  taskset -c "$cpu_id" "$cpu_check" 1a 0 0 0 a 29 && {
     test_print_trc "CPU num:$cpu_id CPUID(EAX=0x1a),EAX bit29 is 1:ATOM"
     IS_ATOM="$TRUE"
     return 0
@@ -974,6 +974,8 @@ ifs_scan_loop() {
 
   for ((i=1; i<=times; i++)); do
     test_print_trc "Scan loop times:$i"
+    # SPEC: Target 100ms at lowest frequency for all test content on a given core.
+    sleep 0.1
     # If there is bin app, execute the app in target CPU
     [[ -n "$bin" ]] && {
       taskset -c "$cpu_num" "$bin" &
diff --git a/ifs/ifs_tests.sh b/ifs/ifs_tests.sh
index 379897bb..3b2fb938 100755
--- a/ifs/ifs_tests.sh
+++ b/ifs/ifs_tests.sh
@@ -92,6 +92,7 @@ run_ifs_tests() {
       ;;
     legacy_twice_run)
       online_all_cpu
+      modprobe -r "$IFS_NAME"
       enable_ifs_trace
       do_cmd "echo $BATCH_NUM > ${IFS_PATH}/${BATCH}"
       # Need to wait after boot up 1800s, then could test ifs
@@ -132,13 +133,12 @@ run_ifs_tests() {
       ;;
     "$IFS_OFFLINE")
       online_all_cpu
-      enable_ifs_trace
       is_atom
       [[ "$IS_ATOM" == "$TRUE" ]] && {
-        if [[ "$BATCH_NUM" -eq 3 ]]; then
-          skip_test "It's an atom CPU, no sibling CPU for ifs testing."
-        fi
+        skip_test "It's an atom CPU, no sibling CPU for ifs testing."
       }
+      modprobe -r "$IFS_NAME"
+      enable_ifs_trace
       do_cmd "echo $BATCH_NUM > ${IFS_PATH}/${BATCH}"
       init_log "${NAME}_${BATCH_NUM}"