diff --git a/generic-release-1.0/system-info.sh b/generic-release-1.0/system-info.sh
index 182368bb2b6a5acb7e0229c3639333a5b90839ab..cdbd2631274f1d71e8eed58105971d9854d45aeb 100644
--- a/generic-release-1.0/system-info.sh
+++ b/generic-release-1.0/system-info.sh
@@ -12,6 +12,39 @@
 # Welcome
 welcome=$(uname -r)
 
+#function
+function get_mem_usage {
+  differ=`expr $1 - $2 - $3 - $4 - $5`
+  milli=`expr $differ \* 10000 / $1`
+  percent=`expr $differ \* 1000 / $1`
+  predominant=`expr $differ \* 100 / $1`
+
+  round=`expr $milli % 10`
+  if [ ${round} -ge 5 ];then
+    mid=`expr $percent % 10`
+    last=`expr $mid + 1`
+  else
+    last=`expr $percent % 10`
+  fi
+  echo "${predominant}.${last}%"
+}
+
+function get_swap_mem {
+  swap_diff=`expr $1 - $2`
+  swap_milli=`expr $swap_diff \* 10000 / $1`
+  swap_percent=`expr $swap_diff \* 1000 / $1`
+  swap_dominant=`expr $swap_diff \* 100 / $1`
+
+  swap_round=`expr $swap_milli %10`
+  if [ ${round} -ge 5 ];then
+    swap_mid=`expr $swap_percent % 10`
+    swap_last=`expr $swap_mid + 1`
+  else
+    swap_last=`expr $swap_percent % 10`
+  fi
+  echo "${swap_dominant}.${swap_last}%"
+}
+
 # Memory
 memory_total=$(cat /proc/meminfo | awk '/^MemTotal:/ {printf($2)}')
 memory_free=$(cat /proc/meminfo | awk '/^MemFree:/ { printf($2)}')
@@ -23,8 +56,7 @@ swap_free=$(cat /proc/meminfo | awk '/^SwapFree:/ { printf($2)}')
 
 if [[ $memory_total -gt 0 ]]
 then
-    memory_usage=`echo "scale=1; ($memory_total - $memory_free - $buffers - $cached - $sreclaimable) * 100.0 / $memory_total" |bc`
-    memory_usage="${memory_usage}%"
+    memory_usage=`get_mem_usage $memory_total $memory_free $buffers $cached $sreclaimable`
 else
     memory_usage=0.0%
 fi
@@ -32,8 +64,7 @@ fi
 # Swap memory
 if [[ $swap_total -gt 0 ]]
 then
-    swap_mem=`echo "scale=1; ($swap_total - $swap_free) * 100.0 / $swap_total" |bc`
-    swap_mem="${swap_mem}%"
+    swap_mem=`get_swap_mem $swap_total $swap_free`
 else
     swap_mem=0.0%
 fi
diff --git a/generic-release.spec b/generic-release.spec
index bec1cf620e85bc4146b5007ffeb90c9feb5e5f53..06c82b345095f65736b0203ac01d9ff81d3dfb8c 100644
--- a/generic-release.spec
+++ b/generic-release.spec
@@ -6,7 +6,7 @@
 %define generic_version 20.03
 %define generic_patch_level LTS
 %define generic_patch_level_extend SP4
-%define generic_release 55
+%define generic_release 56
 %define builtin_release_version 1.0
 
 %define current_arch %{_arch}
@@ -206,6 +206,9 @@ rm -rf $RPM_BUILD_ROOT
 %files -n %{product_family}-release-custom
 
 %changelog
+* Thu Nov 09 2023 Ge Wang <wang__ge@126.com> - 1.0-56
+- replace calculate tool from dc to expr
+
 * Fri Oct 20 2023 wangchong <wangchong56@h-partners.com> - 1.0-55
 - modify release for openEuler-20.03-LTS-SP4