diff --git a/CMakeLists.txt b/CMakeLists.txt
index 742034c6e97a2ba5e32bf7587a19dfd74534da0e..410a58195909424e1586914e424ddf4d2b2c0447 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,7 +16,12 @@ if (POLICY CMP0048)
 endif (POLICY CMP0048)
 set(PROJECT_TOP_DIR ${CMAKE_CURRENT_LIST_DIR})
 project(libkprof)
-set(CMAKE_INSTALL_PREFIX "${PROJECT_TOP_DIR}/output/" CACHE PATH "Installation directory" FORCE)
+if(NOT DEFINED CMAKE_INSTALL_PREFIX OR CMAKE_INSTALL_PREFIX STREQUAL "")
+    set(CMAKE_INSTALL_PREFIX "${PROJECT_TOP_DIR}/output/" CACHE PATH "Installation directory" FORCE)
+endif()
+if (NOT DEFINED CMAKE_BUILD_TYPE OR CMAKE_BUILD_TYPE STREQUAL "")
+    set(CMAKE_BUILD_TYPE Release)
+endif()
 
 cmake_minimum_required (VERSION 3.12.0)
 set(CMAKE_CXX_STANDARD 11)
@@ -27,9 +32,6 @@ set(CMAKE_C_STANDARD 11)
 if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.8.5)
     message(FATAL_ERROR "GCC 4.8.5 or newer required")
 endif()
-if (NOT CMAKE_BUILD_TYPE)
-    set(CMAKE_BUILD_TYPE Release)
-endif()
 
 set(TOP_DIR ${PROJECT_SOURCE_DIR})
 
diff --git a/README.en.md b/README.en.md
index f9ee1221ea603e00d31e92195a9e1cc442f75182..84e8380d76062f643e7a4cfdffcc65a4f5dbd6ac 100644
--- a/README.en.md
+++ b/README.en.md
@@ -16,9 +16,9 @@ Symbol resolve module is developed on elfin-parser, a library for parsing elf an
 Run bash script:
 
 ```sh
-sh build.sh
+sh build.sh installPath=/home/libkperf
 ```
-Headers and libraries will be installed to ./output directory.
+As mentioned above, the header and library will be installed in the/home/libkperf output directory, and installPath is an optional parameter. If not set, it will be installed in the output directory under libkperf by default.
 
 #### Instructions
 All pmu functions are accomplished by the following interfaces:
diff --git a/README.md b/README.md
index 2c4d72ecd25eaa89cba3537bbdc8943b0597e2d7..e2af003da430a58173d3f955df05dbb01dee29c6 100644
--- a/README.md
+++ b/README.md
@@ -19,10 +19,10 @@ Pmu收集模块是在syscall perf_event_open上开发的，用于启用内核pmu
 运行bash脚本:
 
 ```
-sh build.sh
+sh build.sh installPath=/home/libkperf
 ```
 
-标头和库将安装到。/输出目录。 
+如上，标头和库将安装到/home/libkperf输出目录，installPath是可选参数，若没有设置，则默认安装到libkperf下的output目录。
 
 #### 指令
 
diff --git a/build.sh b/build.sh
index 511c3e305eac71d3d747114a81ea83e8fe0691ff..fe428c2468541dd51c0244d8109544b5b555df7a 100644
--- a/build.sh
+++ b/build.sh
@@ -19,10 +19,15 @@ PROJECT_DIR=$(realpath "${CURRENT_DIR}")
 
 BUILD_DIR=${PROJECT_DIR}/_build
 THIRD_PARTY=${PROJECT_DIR}/third_party/
+INSTALL_PATH=${PROJECT_DIR}/output/
+BUILD_TYPE=Release
+# Test cases are not compiled by default.
+INCLUDE_TEST=false
+
 source ${PROJECT_DIR}/build/common.sh
 
 creat_dir "${BUILD_DIR}"
-# 指定所有依赖使用的gcc
+# Specifies the gcc used by all dependencies.
 export CC=gcc
 export CXX=g++
 if [ -d "${THIRD_PARTY}/local" ];then
@@ -32,15 +37,19 @@ else
   creat_dir ${THIRD_PARTY}/local
 fi
 
-# 默认情况下不编译测试用例
-INCLUDE_TEST=OFF
-echo "$1"
-
-# 如果第一个参数是 "test"，则设置 INCLUDE_TEST 为 ON
-if [[ "$1" == "test" ]]; then
-    build_googletest $THIRD_PARTY
-    INCLUDE_TEST=ON
-fi
+for arg in "$@"; do
+    case "$arg" in
+        test=*)
+            INCLUDE_TEST="${arg#*=}"
+            ;;
+        installPath=*)
+            INSTALL_PATH="${arg#*=}"
+            ;;
+        build_type=*)
+            BUILD_TYPE="${arg#*=}"
+            ;;
+    esac
+done
 
 # build libprof.so libraries including libprocfs.so libprocfs.a libpmu.so libpmu.a libtrace.so libtrace.so
 function build_elfin() {
@@ -72,15 +81,15 @@ function build_elfin() {
 build_libprof()
 {
     cd $BUILD_DIR
-    cmake -DINCLUDE_TEST=$INCLUDE_TEST ..
+    cmake -DINCLUDE_TEST=${INCLUDE_TEST} -DCMAKE_INSTALL_PREFIX=${INSTALL_PATH} -DCMAKE_BUILD_TYPE=${BUILD_TYPE} ..
     make -j ${cpu_core_num}
     make install
-    echo "build_libprof success"
+    echo "build_libkperf success"
 }
 
 function build_test()
 {
-    if [ "$INCLUDE_TEST" = "ON" ]; then
+    if [ "$INCLUDE_TEST" = "true" ]; then
         execute_binary "$PROJECT_DIR"
     fi
 }
@@ -91,6 +100,6 @@ main() {
     build_test
 }
 
-# bash build.sh test来获取UT
+# bash build.sh test=true installPath=/home/ build_type=Release .The last three settings are optional.
 main $@
 
diff --git a/pmu/pmu_list.cpp b/pmu/pmu_list.cpp
index e79b854f034f304b392f0b4758307a85867609fe..a3b14995ab1dc8371dcb95a45b1527209cad5bb2 100644
--- a/pmu/pmu_list.cpp
+++ b/pmu/pmu_list.cpp
@@ -76,7 +76,7 @@ namespace KUNPENG_PMU {
             if (err != SUCCESS) {
                 return err;
             }
-            fdNum += cpuTopoList.size() + procTopoList.size();
+            fdNum += cpuTopoList.size() * procTopoList.size();
             std::shared_ptr<EvtList> evtList =
                     std::make_shared<EvtList>(GetSymbolMode(pd), cpuTopoList, procTopoList, pmuTaskAttrHead->pmuEvt);
             InsertEvtList(pd, evtList);
diff --git a/test/test_perf/CMakeLists.txt b/test/test_perf/CMakeLists.txt
index 74f71021538bc56c72c0513c1cfba0ebe67a80bd..eda080896c47983abba50ae609c7d6dc444a46ae 100644
--- a/test/test_perf/CMakeLists.txt
+++ b/test/test_perf/CMakeLists.txt
@@ -9,6 +9,5 @@ set(CMAKE_CXX_STANDARD 14)
 aux_source_directory(. SOURCE_SRC)
 add_executable(test_perf ${SOURCE_SRC} ${CMAKE_CURRENT_LIST_DIR}/../../util/pcerr.cpp)
 target_link_libraries(test_perf sym kperf gtest m gtest_main elf_static dwarf_static pthread -g)
-install(TARGETS test_perf DESTINATION ${CMAKE_INSTALL_PREFIX}/ COMPONENT test)
 
 add_subdirectory(case)
diff --git a/test/test_symbol/CMakeLists.txt b/test/test_symbol/CMakeLists.txt
index 303c01f897bae84d2c02de5bd6fe3689fd3e8e54..80b52048a636b684021722d93acd9d5db0c76ef8 100644
--- a/test/test_symbol/CMakeLists.txt
+++ b/test/test_symbol/CMakeLists.txt
@@ -5,6 +5,5 @@ set(CMAKE_CXX_STANDARD 14)
 aux_source_directory(. SOURCE_SRC)
 add_executable(test_symbol ${SOURCE_SRC} ${CMAKE_CURRENT_LIST_DIR}/../../util/pcerr.cpp)
 target_link_libraries(test_symbol sym gtest m gmock gtest_main elf_static dwarf_static pthread)
-install(TARGETS test_symbol  DESTINATION ${CMAKE_INSTALL_PREFIX}/ COMPONENT test)
 
 add_subdirectory(case)
\ No newline at end of file