diff --git a/kernel/arch/arm/cortex-m3/keil/los_dispatch.S b/kernel/arch/arm/cortex-m3/keil/los_dispatch.S
index ba53feb6..f6bb1088 100644
--- a/kernel/arch/arm/cortex-m3/keil/los_dispatch.S
+++ b/kernel/arch/arm/cortex-m3/keil/los_dispatch.S
@@ -111,6 +111,8 @@ HalTaskSchedule
     LDR     R0, =OS_NVIC_INT_CTRL
     LDR     R1, =OS_NVIC_PENDSVSET
     STR     R1, [R0]
+    DSB
+    ISB
     BX      LR
 
 HalPendSV
diff --git a/kernel/arch/arm/cortex-m33/gcc/los_dispatch.S b/kernel/arch/arm/cortex-m33/gcc/los_dispatch.S
index 298e7409..309fdde4 100644
--- a/kernel/arch/arm/cortex-m33/gcc/los_dispatch.S
+++ b/kernel/arch/arm/cortex-m33/gcc/los_dispatch.S
@@ -142,6 +142,8 @@ HalTaskSchedule:
     ldr     r0, =OS_NVIC_INT_CTRL
     ldr     r1, =OS_NVIC_PENDSVSET
     str     r1, [r0]
+    dsb
+    isb
     bx      lr
    .fnend
 
diff --git a/kernel/arch/arm/cortex-m4/gcc/los_dispatch.S b/kernel/arch/arm/cortex-m4/gcc/los_dispatch.S
index 648cb7c9..5116cd9c 100644
--- a/kernel/arch/arm/cortex-m4/gcc/los_dispatch.S
+++ b/kernel/arch/arm/cortex-m4/gcc/los_dispatch.S
@@ -145,6 +145,8 @@ HalTaskSchedule:
     ldr     r1, =OS_NVIC_PENDSVSET
     str     r1, [r0]
     bx      lr
+    dsb
+    isb
    .fnend
 
 
diff --git a/kernel/arch/arm/cortex-m4/iar/los_dispatch.S b/kernel/arch/arm/cortex-m4/iar/los_dispatch.S
index e4c88527..dac97f6e 100755
--- a/kernel/arch/arm/cortex-m4/iar/los_dispatch.S
+++ b/kernel/arch/arm/cortex-m4/iar/los_dispatch.S
@@ -124,6 +124,8 @@ HalTaskSchedule
     LDR     R0, =OS_NVIC_INT_CTRL
     LDR     R1, =OS_NVIC_PENDSVSET
     STR     R1, [R0]
+    DSB
+    ISB
     BX      LR
 
 HalPendSV
diff --git a/kernel/arch/arm/cortex-m7/gcc/los_dispatch.S b/kernel/arch/arm/cortex-m7/gcc/los_dispatch.S
index 298e7409..309fdde4 100644
--- a/kernel/arch/arm/cortex-m7/gcc/los_dispatch.S
+++ b/kernel/arch/arm/cortex-m7/gcc/los_dispatch.S
@@ -142,6 +142,8 @@ HalTaskSchedule:
     ldr     r0, =OS_NVIC_INT_CTRL
     ldr     r1, =OS_NVIC_PENDSVSET
     str     r1, [r0]
+    dsb
+    isb
     bx      lr
    .fnend
 
diff --git a/kernel/arch/arm/cortex-m7/iar/los_dispatch.S b/kernel/arch/arm/cortex-m7/iar/los_dispatch.S
index e4c88527..dac97f6e 100755
--- a/kernel/arch/arm/cortex-m7/iar/los_dispatch.S
+++ b/kernel/arch/arm/cortex-m7/iar/los_dispatch.S
@@ -124,6 +124,8 @@ HalTaskSchedule
     LDR     R0, =OS_NVIC_INT_CTRL
     LDR     R1, =OS_NVIC_PENDSVSET
     STR     R1, [R0]
+    DSB
+    ISB
     BX      LR
 
 HalPendSV