diff --git a/plugins/op_waf/t/bench/test_get_cpu.lua b/plugins/op_waf/t/bench/test_get_cpu.lua
index 05138b619..227f35655 100644
--- a/plugins/op_waf/t/bench/test_get_cpu.lua
+++ b/plugins/op_waf/t/bench/test_get_cpu.lua
@@ -1,3 +1,5 @@
+-- cd /www/server/mdserver-web/plugins/op_waf/t/bench && bash bench.sh
+
 local function target()
     ngx.re.find("hello, world.", [[\w+\.]], "jo")
 end
@@ -5,7 +7,7 @@ for i = 1, 100 do
     target()
 end
 
-function file_exists(path)
+local function file_exists(path)
   local file = io.open(path, "rb")
   if file then file:close() end
   return file ~= nil
@@ -14,42 +16,48 @@ end
 -- 以上为预热操作
 collectgarbage()
 
+local json = require "cjson"
 
-function get_cpu_stat()
+local function data_split(self, str,reps )
+    local rsList = {}
+    string.gsub(str,'[^'..reps..']+',function(w)
+        table.insert(rsList,w)
+    end)
+    return rsList
+end
+
+local function get_cpu_stat()
     local cpu_total = 0
     local fp = io.open('/proc/stat','r')
     local cpu_line = fp:read()
     fp:close()
 
+    local list = ngx_re.split(cpu_line," ")
+    table.remove(list,1)
+    table.remove(list,1)
 
-    local iterator, err = ngx.re.gmatch(cpu_line,"(d+)")
-    while true do
-        local m, err = iterator()
-        if not m then
-            break
-        end
-        cpu_total = cpu_total + m[0]
+    local idie = list[4]
+    for i,v in pairs(list)
+    do
+        cpu_total = cpu_total + v
     end
-    return cpu_total
+
+    local use_percent = tonumber(100-(idie/cpu_total)*100)
+
+    return cpu_total,idie,use_percent
 end
 
-function get_cpu_percent()
-    local fp = io.open("/proc/stat","r")
-    local cpu_line = fp:read()
-    fp:close()
-    local iterator, err = ngx.re.gmatch(cpu_line,"(d+)")
-    while true do
-        local m, err = iterator()
-        if not m then
-            break
-        end
-        cpu_total1 = cpu_total1 + m[0]
-    end
+local function get_cpu_percent()
+    local cpu_total,idie,use_percent = get_cpu_stat()
+    ngx.sleep(2)
+    local cpu_total2,idie2,use_percent2 = get_cpu_stat()
+    local cpu_usage_percent = tonumber(100-(((idie2-idie)/(cpu_total2-cpu_total))*100))
+    return cpu_usage_percent
 end
 
 ngx.update_time()
 local begin = ngx.now()
-local N = 1e2
+local N = 1e1
 for i = 1, N do
     get_cpu_stat()
 end
diff --git a/plugins/op_waf/waf/lua/init_worker.lua b/plugins/op_waf/waf/lua/init_worker.lua
index a4897b7b8..f9fdedf06 100644
--- a/plugins/op_waf/waf/lua/init_worker.lua
+++ b/plugins/op_waf/waf/lua/init_worker.lua
@@ -32,6 +32,11 @@ end
 
 ngx.shared.waf_limit:set("cpu_usage", 0, 10)
 function waf_timer_every_get_cpu(premature)
+    if WAF_C:file_exists('/proc/stat') then
+        local lua_cpu_percent = WAF_C:get_cpu_percent()
+        WAF_C:D("lua_cpu_percent:"..tostring(lua_cpu_percent))
+    end
+
     local cpu_percent = WAF_C:read_file_body(waf_root.."/cpu.info")
     -- WAF_C:D("cpu_usage:"..tostring(cpu_percent ))
     if cpu_percent then
diff --git a/plugins/op_waf/waf/lua/waf_common.lua b/plugins/op_waf/waf/lua/waf_common.lua
index 21007a5fc..4d4eedc5a 100644
--- a/plugins/op_waf/waf/lua/waf_common.lua
+++ b/plugins/op_waf/waf/lua/waf_common.lua
@@ -765,6 +765,34 @@ function _M.is_key(self, arr, key)
     return false
 end
 
+function _M.get_cpu_stat(self)
+    local cpu_total = 0
+    local fp = io.open('/proc/stat','r')
+    local cpu_line = fp:read()
+    fp:close()
+
+    local list = ngx_re.split(cpu_line," ")
+    table.remove(list,1)
+    table.remove(list,1)
+
+    local idie = list[4]
+    for i,v in pairs(list)
+    do
+        cpu_total = cpu_total + v
+    end
+
+    local use_percent = tonumber(100-(idie/cpu_total)*100)
+    return cpu_total,idie,use_percent
+end
+
+function _M.get_cpu_percent(self)
+    local cpu_total,idie,use_percent = self:get_cpu_stat()
+    ngx.sleep(2)
+    local cpu_total2,idie2,use_percent2 = self:get_cpu_stat()
+    local cpu_usage_percent = tonumber(100-(((idie2-idie)/(cpu_total2-cpu_total))*100))
+    return cpu_usage_percent
+end
+
 
 function _M.return_post_data(self)
     if method ~= "POST" then return false end