diff --git a/source/os/src/osSysinfo.c b/source/os/src/osSysinfo.c
index 8450e8baea60bca7d1ca2f5d5dde1f1fc1953629..fa94bc6a13d289349f687fd214247151c6a2d6c9 100644
--- a/source/os/src/osSysinfo.c
+++ b/source/os/src/osSysinfo.c
@@ -374,9 +374,10 @@ int32_t taosGetCpuInfo(char *cpuModel, int32_t maxLen, float *numOfCores) {
   size_t  size = 0;
   int32_t done = 0;
   int32_t code = -1;
+  float   coreCount = 0;
 
   TdFilePtr pFile = taosOpenFile("/proc/cpuinfo", TD_FILE_READ | TD_FILE_STREAM);
-  if (pFile == NULL) return false;
+  if (pFile == NULL) return code;
 
   while (done != 3 && (size = taosGetLineFile(pFile, &line)) != -1) {
     line[size - 1] = '\0';
@@ -390,11 +391,26 @@ int32_t taosGetCpuInfo(char *cpuModel, int32_t maxLen, float *numOfCores) {
       *numOfCores = atof(v);
       done |= 2;
     }
+    if (strncmp(line, "processor", 9) == 0) coreCount += 1;
   }
 
   if (line != NULL) taosMemoryFree(line);
   taosCloseFile(&pFile);
 
+  if (code != 0) {
+    TdFilePtr pFile1 = taosOpenFile("/proc/device-tree/model", TD_FILE_READ | TD_FILE_STREAM);
+    if (pFile1 == NULL) return code;
+    taosGetsFile(pFile1, maxLen, cpuModel);
+    taosCloseFile(&pFile1);
+    code = 0;
+    done |= 1;
+  }
+
+  if ((done & 2) == 0) {
+  	*numOfCores = coreCount;
+  	done |= 2;
+  }
+  
   return code;
 #endif
 }
diff --git a/tests/system-test/2-query/cast.py b/tests/system-test/2-query/cast.py
index bdac2b6175fc5a4157bc58bf2329848c36fb204b..4045b6ad88106e9fed718d00f08b3c113236ac91 100644
--- a/tests/system-test/2-query/cast.py
+++ b/tests/system-test/2-query/cast.py
@@ -566,8 +566,7 @@ class TDTestCase:
             if data_ct4_c10[i] is None:
                 tdSql.checkData( i, 0, None )
             else:
-                # time2str = str(int((data_ct4_c10[i]-datetime.datetime.fromtimestamp(0)).total_seconds()*1000))
-                time2str = str(int((datetime.datetime.timestamp(data_ct4_c10[i])-datetime.datetime.timestamp(datetime.datetime.fromtimestamp(0)))*1000))
+                time2str = str(int((data_ct4_c10[i]-datetime.datetime.fromtimestamp(0)).total_seconds()*1000))
                 tdSql.checkData( i, 0, time2str )
         tdSql.query(f"select cast(c10 as nchar(32)) as b from {self.dbname}.t1")
         for i in range(len(data_t1_c10)):
@@ -576,8 +575,7 @@ class TDTestCase:
             elif i == 10:
                 continue
             else:
-                # time2str = str(int((data_t1_c10[i]-datetime.datetime.fromtimestamp(0)).total_seconds()*1000))
-                time2str = str(int((datetime.datetime.timestamp(data_t1_c10[i])-datetime.datetime.timestamp(datetime.datetime.fromtimestamp(0)))*1000))
+                time2str = str(int((data_t1_c10[i]-datetime.datetime.fromtimestamp(0)).total_seconds()*1000))
                 tdSql.checkData( i, 0, time2str )
 
         tdLog.printNoPrefix("==========step38: cast timestamp to binary, expect no changes ")
@@ -586,8 +584,7 @@ class TDTestCase:
             if data_ct4_c10[i] is None:
                 tdSql.checkData( i, 0, None )
             else:
-                # time2str = str(int((data_ct4_c10[i]-datetime.datetime.fromtimestamp(0)).total_seconds()*1000))
-                time2str = str(int((datetime.datetime.timestamp(data_ct4_c10[i])-datetime.datetime.timestamp(datetime.datetime.fromtimestamp(0)))*1000))
+                time2str = str(int((data_ct4_c10[i]-datetime.datetime.fromtimestamp(0)).total_seconds()*1000))
                 tdSql.checkData( i, 0, time2str )
         tdSql.query(f"select cast(c10 as binary(32)) as b from {self.dbname}.t1")
         for i in range(len(data_t1_c10)):
@@ -596,8 +593,7 @@ class TDTestCase:
             elif i == 10:
                 continue
             else:
-                # time2str = str(int((data_t1_c10[i]-datetime.datetime.fromtimestamp(0)).total_seconds()*1000))
-                time2str = str(int((datetime.datetime.timestamp(data_t1_c10[i])-datetime.datetime.timestamp(datetime.datetime.fromtimestamp(0)))*1000))
+                time2str = str(int((data_t1_c10[i]-datetime.datetime.fromtimestamp(0)).total_seconds()*1000))
                 tdSql.checkData( i, 0, time2str )
 
         tdLog.printNoPrefix("==========step39: cast constant operation to bigint, expect change to int ")