diff --git a/clients/client-linux.py b/clients/client-linux.py
index 0c858aa..301231e 100755
--- a/clients/client-linux.py
+++ b/clients/client-linux.py
@@ -222,56 +222,57 @@ def _disk_io():
     磁盘读写有误差：4k，8k ，https://stackoverflow.com/questions/34413926/psutil-vs-dd-monitoring-disk-i-o
     :return:
     '''
-    # pre pid snapshot
-    snapshot_first = {}
-    # next pid snapshot
-    snapshot_second = {}
-    # read count snapshot
-    snapshot_read = 0
-    # write count snapshot
-    snapshot_write = 0
-    # process snapshot
-    pid_snapshot = [str(i) for i in os.listdir("/proc") if i.isdigit() is True]
-    for pid in pid_snapshot:
-        try:
-            with open("/proc/{}/io".format(pid)) as f:
-                pid_io = {}
-                for line in f.readlines():
-                    if "read_bytes" in line:
-                        pid_io["read"] = int(line.split("read_bytes:")[-1].strip())
-                    elif "write_bytes" in line and "cancelled_write_bytes" not in line:
-                        pid_io["write"] = int(line.split("write_bytes:")[-1].strip())
-                pid_io["name"] = open("/proc/{}/comm".format(pid), "r").read().strip()
-                snapshot_first[pid] = pid_io
-        except:
-            if pid in snapshot_first:
-                snapshot_first.pop(pid)
+    while True:
+        # pre pid snapshot
+        snapshot_first = {}
+        # next pid snapshot
+        snapshot_second = {}
+        # read count snapshot
+        snapshot_read = 0
+        # write count snapshot
+        snapshot_write = 0
+        # process snapshot
+        pid_snapshot = [str(i) for i in os.listdir("/proc") if i.isdigit() is True]
+        for pid in pid_snapshot:
+            try:
+                with open("/proc/{}/io".format(pid)) as f:
+                    pid_io = {}
+                    for line in f.readlines():
+                        if "read_bytes" in line:
+                            pid_io["read"] = int(line.split("read_bytes:")[-1].strip())
+                        elif "write_bytes" in line and "cancelled_write_bytes" not in line:
+                            pid_io["write"] = int(line.split("write_bytes:")[-1].strip())
+                    pid_io["name"] = open("/proc/{}/comm".format(pid), "r").read().strip()
+                    snapshot_first[pid] = pid_io
+            except:
+                if pid in snapshot_first:
+                    snapshot_first.pop(pid)
 
-    time.sleep(INTERVAL)
+        time.sleep(INTERVAL)
 
-    for pid in pid_snapshot:
-        try:
-            with open("/proc/{}/io".format(pid)) as f:
-                pid_io = {}
-                for line in f.readlines():
-                    if "read_bytes" in line:
-                        pid_io["read"] = int(line.split("read_bytes:")[-1].strip())
-                    elif "write_bytes" in line and "cancelled_write_bytes" not in line:
-                        pid_io["write"] = int(line.split("write_bytes:")[-1].strip())
-                pid_io["name"] = open("/proc/{}/comm".format(pid), "r").read().strip()
-                snapshot_second[pid] = pid_io
-        except:
-            if pid in snapshot_first:
-                snapshot_first.pop(pid)
-            if pid in snapshot_second:
-                snapshot_second.pop(pid)
+        for pid in pid_snapshot:
+            try:
+                with open("/proc/{}/io".format(pid)) as f:
+                    pid_io = {}
+                    for line in f.readlines():
+                        if "read_bytes" in line:
+                            pid_io["read"] = int(line.split("read_bytes:")[-1].strip())
+                        elif "write_bytes" in line and "cancelled_write_bytes" not in line:
+                            pid_io["write"] = int(line.split("write_bytes:")[-1].strip())
+                    pid_io["name"] = open("/proc/{}/comm".format(pid), "r").read().strip()
+                    snapshot_second[pid] = pid_io
+            except:
+                if pid in snapshot_first:
+                    snapshot_first.pop(pid)
+                if pid in snapshot_second:
+                    snapshot_second.pop(pid)
 
-    for k, v in snapshot_first.items():
-        if snapshot_first[k]["name"] == snapshot_second[k]["name"] and snapshot_first[k]["name"] != "bash":
-            snapshot_read += (snapshot_second[k]["read"] - snapshot_first[k]["read"])
-            snapshot_write += (snapshot_second[k]["write"] - snapshot_first[k]["write"])
-    diskIO["read"] = snapshot_read
-    diskIO["write"] = snapshot_write
+        for k, v in snapshot_first.items():
+            if snapshot_first[k]["name"] == snapshot_second[k]["name"] and snapshot_first[k]["name"] != "bash":
+                snapshot_read += (snapshot_second[k]["read"] - snapshot_first[k]["read"])
+                snapshot_write += (snapshot_second[k]["write"] - snapshot_first[k]["write"])
+        diskIO["read"] = snapshot_read
+        diskIO["write"] = snapshot_write
 
 def get_realtime_data():
     '''