diff --git a/README.en.md b/README.en.md
index 6644bc3b0cfd8e8e87060622cb691dd4a4f870a0..ffc0d1350f1700a063556f80cb2a057f2478e86c 100644
--- a/README.en.md
+++ b/README.en.md
@@ -84,12 +84,25 @@ To build a python package:
 bash build.sh install_path=/path/to/install python=true
 ```
 
+If the environment contains multiple Python versions, you need to specify the Python interpreter to be installed
+```shell
+bash build.sh python=true python_exe=$(which python3)
+```
+
 To uninstall python package:
 
 ```shell
 python3 -m pip uninstall -y libkperf
 ```
 
+If a Python module runtime error similar to the following is reported:
+OSERROR: /usr/lib/python3.9/site-packages/_libkperf/libsym.so: cannot open shared object file: No such file or directory
+The Python installation fails due to an incompatible setuptool version. This can be resolved by downgrading.
+```shell
+python3 -m pip uninstall setuptools
+python3 -m pip install setuptools=58
+```
+
 TO build a Go package:
 
 ```shell
diff --git a/README.md b/README.md
index a0e33c62e152c8d02b0de33e8e43c8f9256c2b40..c441df5939842e08be436c77b21e039204ea3310 100644
--- a/README.md
+++ b/README.md
@@ -65,7 +65,12 @@ bash build.sh install_path=/path/to/install build_type=debug
 
 如果想要编译python包：
 ```shell
-bash build.sh install_path=/path/to/install python=true
+bash build.sh install_path=/path/to/install python=true 
+```
+
+假如环境中包含多个python版本，需要指定要安装的python解释器
+```shell
+bash build.sh python=true python_exe=$(which python3)
 ```
 
 安装后若需要卸载python库， 可以执行下述命令
@@ -73,6 +78,14 @@ bash build.sh install_path=/path/to/install python=true
 python3 -m pip uninstall -y libkperf
 ```
 
+python模块运行时报错若类似如下
+OSERROR: /usr/lib/python3.9/site-packages/_libkperf/libsym.so: cannot open shared object file: No such file or directory
+python安装setuptool版本不适配问题导致安装失败，目前可采用降级的方式解决
+```shell
+python3 -m pip uninstall setuptools
+python3 -m pip install setuptools=58
+```
+
 想要编译go的包
 ```shell
 bash build.sh go=true
diff --git a/pmu/evt.cpp b/pmu/evt.cpp
index c9a27ae6e741d56c95b2fe35a9e9aa1eab04c55f..992258289b6528cd2d80e3010e8f5ba32865efbe 100644
--- a/pmu/evt.cpp
+++ b/pmu/evt.cpp
@@ -22,14 +22,7 @@
 #include "pcerrc.h"
 #include "evt.h"
 
-enum class HEAD_SIZE {
-    HEAD_SIZE_ONE = 1,
-    HEAD_SIZE_TWO = 2,
-    HEAD_SIZE_FOUR = 4,
-    HEAD_SIZE_EIGHT = 8,
-};
-
-static constexpr double CUT_OFF_PERCENT = 0.05;
+
 int KUNPENG_PMU::PerfEventOpen(struct perf_event_attr *attr, pid_t pid, int cpu, int groupFd, unsigned long flags)
 {
     return syscall(__NR_perf_event_open, attr, pid, cpu, groupFd, flags);
diff --git a/pmu/evt_list_default.cpp b/pmu/evt_list_default.cpp
index 6f96e88c2965ae7669537835a3c3a14cb05b8f83..5b050a4f6f2ba135ff5bfb4b5b8061414481a211 100644
--- a/pmu/evt_list_default.cpp
+++ b/pmu/evt_list_default.cpp
@@ -71,6 +71,9 @@ void KUNPENG_PMU::EvtListDefault::AdaptErrInfo(int err, PerfEvtPtr perfEvt)
         case LIBPERF_ERR_COUNTER_INDEX_IS_ZERO:
             pcerr::SetCustomErr(err, "There are too many open events. No registers are available.");
             break;
+        case LIBPERF_ERR_OPEN_INVALID_FILE:
+            pcerr::SetCustomErr(err, "The kernel cannot find the corresponding file or directory when loading the event: " +perfEvt->GetEvtName());
+            break;
         case UNKNOWN_ERROR:
             pcerr::SetCustomErr(err, std::string{strerror(errno)});
             break;
diff --git a/pmu/perf_counter_default.cpp b/pmu/perf_counter_default.cpp
index 0dd1ec599e5cf037633f0920a44417e84e1d0f33..f34f23c9ccae7075dc9fd275b589a5da29299ddd 100644
--- a/pmu/perf_counter_default.cpp
+++ b/pmu/perf_counter_default.cpp
@@ -36,7 +36,6 @@
 using namespace std;
 using namespace pcerr;
 
-static constexpr int MAX_ATTR_SIZE = 120;
 
 struct GroupReadFormat {
     __u64 nr;
diff --git a/pmu/pmu.cpp b/pmu/pmu.cpp
index b83c4afa4c0704d1ef6134ab6f84ff86106eeea7..7d234f236238ada3dd8dd5bfe643f97cf769730e 100644
--- a/pmu/pmu.cpp
+++ b/pmu/pmu.cpp
@@ -38,7 +38,6 @@ using namespace std;
 static unordered_map<unsigned, bool> runningStatus;
 static SafeHandler<unsigned> pdMutex;
 static pair<unsigned, const char**> uncoreEventPair;
-static std::set<int> onLineCpuIds;
 
 #define REQUEST_USER_ACCESS 0x2
 
@@ -1194,4 +1193,3 @@ struct SampleRawField *PmuGetFieldExp(struct SampleRawData *rawData, const char
     return rt;
 #endif
 }
-
diff --git a/pmu/pmu_event.cpp b/pmu/pmu_event.cpp
index 21324a681645573117f386a0e1c6a28348ac8f50..046e4c5ad406ec7795a24a3909379c745a1c7a6c 100644
--- a/pmu/pmu_event.cpp
+++ b/pmu/pmu_event.cpp
@@ -20,6 +20,8 @@ namespace KUNPENG_PMU {
     {
         switch (sysErr) {
             case EPERM:
+            case ENOENT:
+                return LIBPERF_ERR_OPEN_INVALID_FILE;
             case EACCES:
                 return LIBPERF_ERR_NO_PERMISSION;
             case EBUSY:
diff --git a/pmu/pmu_metric.cpp b/pmu/pmu_metric.cpp
index 7a99acdb40aa978164052bb98be6c6e0a078c9be..22d4ae2903a0406bbb04a352dd0bab922703d6d8 100644
--- a/pmu/pmu_metric.cpp
+++ b/pmu/pmu_metric.cpp
@@ -39,9 +39,6 @@ using namespace std;
 using namespace pcerr;
 using IdxMap = unordered_map<int, map<int, int>>;
 
-static unsigned maxCpuNum = 0;
-static vector<unsigned> coreArray;
-
 static std::mutex pmuBdfListMtx;
 static std::mutex pmuDeviceDataMtx;
 
diff --git a/pmu/sample_process.cpp b/pmu/sample_process.cpp
index 3eef6c6a7d6ed49a2daef81cec060d9a387e4d70..57989e7089f315b1b6a28adefa370b5604261135 100644
--- a/pmu/sample_process.cpp
+++ b/pmu/sample_process.cpp
@@ -21,8 +21,6 @@
 #include "sample_process.h"
 
 #define PAGE_SIZE (sysconf(_SC_PAGESIZE))
-#define MB() asm volatile("dmb ish" ::: "memory")
-static constexpr int MAX_DATA_SIZE = 8192;
 
 using namespace pcerr;
 
diff --git a/pmu/sampler.h b/pmu/sampler.h
index ba0711a95aa73d3c1fff0e1daa75a6013de4cecc..af4d19847b9fcff4e68b2eec2ea8fd442f01dd50 100644
--- a/pmu/sampler.h
+++ b/pmu/sampler.h
@@ -28,10 +28,6 @@
 #include "symbol.h"
 
 namespace KUNPENG_PMU {
-    struct MmapParam {
-        int prot;
-        __u64 mask;
-    };
 
     static constexpr int SAMPLE_PAGE_SIZE = 4096;
     static constexpr int DEFAULT_SAMPLE_PAGES = 128;
diff --git a/pmu/spe_sampler.cpp b/pmu/spe_sampler.cpp
index b316baf96f24531bb462a658d6e58688146c8f1e..253839e1bafb24622fcb6a0be5414fa8f8bffab9 100644
--- a/pmu/spe_sampler.cpp
+++ b/pmu/spe_sampler.cpp
@@ -24,13 +24,6 @@
 #include "spe_sampler.h"
 #include "pcerr.h"
 
-#define MB() asm volatile("dsb sy");
-#define rmb() asm volatile("dsb ld");
-#define wmb() asm volatile("dsb st");
-
-static constexpr int CYCLES_FREQ = 100;
-static constexpr int SPE_PERIOD = 100;
-
 using namespace std;
 
 namespace KUNPENG_PMU {