diff --git a/hypervisor/common/hv_main.c b/hypervisor/common/hv_main.c
index 8ff5aaea9..b236073d6 100644
--- a/hypervisor/common/hv_main.c
+++ b/hypervisor/common/hv_main.c
@@ -14,6 +14,7 @@
 #include <sprintf.h>
 #include <trace.h>
 #include <logmsg.h>
+#include <shell.h>
 
 void vcpu_thread(struct thread_object *obj)
 {
@@ -47,31 +48,33 @@ void vcpu_thread(struct thread_object *obj)
 		profiling_vmenter_handler(vcpu);
 
 #ifdef HV_DEBUG
-		vmexit_end = rdtsc();
-		if (vmexit_begin != 0UL) {
-			uint64_t delta = vmexit_end - vmexit_begin;
-			uint32_t us = (uint32_t)ticks_to_us(delta);
-			uint16_t fls = (uint16_t)(fls32(us) + 1); /* to avoid us = 0 case, then fls=0xFFFF */
-			uint16_t index = 0;
+		if (is_vmexit_sample_enabled()) {
+			vmexit_end = rdtsc();
+			if (vmexit_begin != 0UL) {
+				uint64_t delta = vmexit_end - vmexit_begin;
+				uint32_t us = (uint32_t)ticks_to_us(delta);
+				uint16_t fls = (uint16_t)(fls32(us) + 1); /* to avoid us = 0 case, then fls=0xFFFF */
+				uint16_t index = 0;
 
-			if (fls >= MAX_VMEXIT_LEVEL) {
-				index = MAX_VMEXIT_LEVEL - 1;
-			} else if (fls > 0) { //if fls == 0, it means the us = 0
-				index = fls - 1;
-			}
+				if (fls >= MAX_VMEXIT_LEVEL) {
+					index = MAX_VMEXIT_LEVEL - 1;
+				} else if (fls > 0) { //if fls == 0, it means the us = 0
+					index = fls - 1;
+				}
 
-			get_cpu_var(vmexit_cnt)[basic_exit_reason][index]++;
-			get_cpu_var(vmexit_time)[basic_exit_reason][0] += delta;
+				get_cpu_var(vmexit_cnt)[basic_exit_reason][index]++;
+				get_cpu_var(vmexit_time)[basic_exit_reason][0] += delta;
 
-			vcpu->vmexit_cnt[basic_exit_reason][index]++;
-			vcpu->vmexit_time[basic_exit_reason][0] += delta;
+				vcpu->vmexit_cnt[basic_exit_reason][index]++;
+				vcpu->vmexit_time[basic_exit_reason][0] += delta;
 
-			if (us > get_cpu_var(vmexit_time)[basic_exit_reason][1]) {
-				get_cpu_var(vmexit_time)[basic_exit_reason][1] = us;
-			}
+				if (us > get_cpu_var(vmexit_time)[basic_exit_reason][1]) {
+					get_cpu_var(vmexit_time)[basic_exit_reason][1] = us;
+				}
 
-			if (us > vcpu->vmexit_time[basic_exit_reason][1]) {
-				vcpu->vmexit_time[basic_exit_reason][1] = us;
+				if (us > vcpu->vmexit_time[basic_exit_reason][1]) {
+					vcpu->vmexit_time[basic_exit_reason][1] = us;
+				}
 			}
 		}
 #endif
@@ -87,9 +90,11 @@ void vcpu_thread(struct thread_object *obj)
 		TRACE_2L(TRACE_VM_EXIT, basic_exit_reason, vcpu_get_rip(vcpu));
 
 #ifdef HV_DEBUG
-		vmexit_begin = rdtsc();
-		get_cpu_var(vmexit_cnt)[basic_exit_reason][TOTAL_ARRAY_LEVEL - 1]++;
-		vcpu->vmexit_cnt[basic_exit_reason][TOTAL_ARRAY_LEVEL - 1]++;
+		if (is_vmexit_sample_enabled()) {
+			vmexit_begin = rdtsc();
+			get_cpu_var(vmexit_cnt)[basic_exit_reason][TOTAL_ARRAY_LEVEL - 1]++;
+			vcpu->vmexit_cnt[basic_exit_reason][TOTAL_ARRAY_LEVEL - 1]++;
+		}
 #endif
 		vcpu->arch.nrexits++;
 
diff --git a/hypervisor/debug/dbg_cmd.c b/hypervisor/debug/dbg_cmd.c
index f37e512d9..df14201f7 100644
--- a/hypervisor/debug/dbg_cmd.c
+++ b/hypervisor/debug/dbg_cmd.c
@@ -10,6 +10,7 @@
 #include <uart16550.h>
 #include <dbg_cmd.h>
 #include <vm_config.h>
+#include <shell.h>
 
 #define MAX_PORT			0x10000  /* port 0 - 64K */
 #define DEFAULT_UART_PORT	0x3F8
@@ -20,6 +21,7 @@ static const char * const cmd_list[] = {
 	"uart=disabled",	/* to disable uart */
 	"uart=port@",		/* like uart=port@0x3F8 */
 	"uart=bdf@",	/*like: uart=bdf@0:18.2, it is for ttyS2 */
+	"vmexit=enable"
 };
 
 enum IDX_CMD_DBG {
@@ -27,6 +29,7 @@ enum IDX_CMD_DBG {
 	IDX_PORT_UART,
 	IDX_PCI_UART,
 
+	IDX_SET_VMEXIT,
 	IDX_MAX_CMD,
 };
 
@@ -104,6 +107,9 @@ bool handle_dbg_cmd(const char *cmd, int32_t len)
 
 		} else if (i == IDX_PCI_UART) {
 			uart16550_set_property(true, false, (uint64_t)(cmd+tmp));
+		} else if (i == IDX_SET_VMEXIT) {
+
+			set_vmexit_sample_flag(true);
 		} else {
 			/* No other state currently, do nothing */
 		}
diff --git a/hypervisor/debug/shell.c b/hypervisor/debug/shell.c
index 0ea36d89f..c0da0c8e0 100644
--- a/hypervisor/debug/shell.c
+++ b/hypervisor/debug/shell.c
@@ -1913,12 +1913,19 @@ static void clear_vmexit_info_buffer(void)
 
 }
 
+/* used to control sample vmexit data */
+static bool vmexit_sample_flag = false;
+
 static int shell_show_vmexit_profile(__unused int argc, __unused char **argv)
 {
 	if ((argc == 2) && (strcmp(argv[1], "clear") == 0)) {
 		clear_vmexit_info_buffer();
 	}
 
+	if (!vmexit_sample_flag) {
+		printf("not enable to sample vmexit data!");
+	}
+
 	get_vmexit_profile_per_pcpu(shell_log_buf, SHELL_LOG_BUF_SIZE);
 	shell_puts(shell_log_buf);
 
@@ -1933,3 +1940,13 @@ static int shell_show_vmexit_profile(__unused int argc, __unused char **argv)
 
 	return 0;
 }
+
+void set_vmexit_sample_flag(bool to_enable)
+{
+	vmexit_sample_flag = to_enable;
+}
+
+bool is_vmexit_sample_enabled(void)
+{
+	return vmexit_sample_flag;
+}
diff --git a/hypervisor/include/debug/shell.h b/hypervisor/include/debug/shell.h
index 67e5f4623..3534e4e83 100644
--- a/hypervisor/include/debug/shell.h
+++ b/hypervisor/include/debug/shell.h
@@ -10,4 +10,7 @@
 void shell_init(void);
 void shell_kick(void);
 
+void set_vmexit_sample_flag(bool to_enable);
+bool is_vmexit_sample_enabled(void);
+
 #endif /* SHELL_H */