diff --git a/pmu/sampler.cpp b/pmu/sampler.cpp
index 3fd1a17183276fdcb89b9f8ea8988efb6e06e9c1..7a50838b546fe7445a35a64c8ea465a038c2edde 100644
--- a/pmu/sampler.cpp
+++ b/pmu/sampler.cpp
@@ -31,6 +31,7 @@
 #include "process_map.h"
 #include "log.h"
 #include "sampler.h"
+#include "common.h"
 
 using namespace std;
 
@@ -131,14 +132,21 @@ void KUNPENG_PMU::PerfSampler::RawSampleProcess(
     KUNPENG_PMU::PerfRawSample *sample = (KUNPENG_PMU::PerfRawSample *)event->sample.array;
     if (symMode != NO_SYMBOL_RESOLVE) {
         // Copy ips from ring buffer and get stack info later.
-        if (evt->callStack == 0 && sample->nr - 1 >= 0) {
-            ips->ips.push_back(sample->ips[sample->nr - 1]);
+        if (evt->callStack == 0) {
+            int i = 0;
+            while (i < sample->nr && !IsValidIp(sample->ips[i])) {
+                i++;
+            }
+            if (i < sample->nr) {
+                ips->ips.push_back(sample->ips[i]);
+            }
         } else {
             for (int i = sample->nr - 1; i >= 0; --i) {
-                ips->ips.push_back(sample->ips[i]);
+                if (IsValidIp(sample->ips[i])) {
+                    ips->ips.push_back(sample->ips[i]);
+                }
             }
         }
-
     }
     current->cpu = static_cast<unsigned>(sample->cpu);
     current->pid = static_cast<pid_t>(sample->pid);
@@ -191,6 +199,12 @@ void KUNPENG_PMU::PerfSampler::FillComm(const size_t &start, const size_t &end,
         auto& pmuData = data[i];
         auto findProc = procMap.find(pmuData.tid);
         if (findProc == procMap.end()) {
+            UpdatePidInfo(pmuData.pid, pmuData.tid);
+            findProc = procMap.find(pmuData.tid);
+            if (findProc == procMap.end()) {
+                continue;
+            }
+            pmuData.comm = findProc->second->comm;
             continue;
         }
         pmuData.comm = findProc->second->comm;
diff --git a/util/common.cpp b/util/common.cpp
index 369ba9410f8cb338139116dd12ae7fcde7cde004..a13efe674cf48eaf18cb950d9f722d4e39ed16ec 100644
--- a/util/common.cpp
+++ b/util/common.cpp
@@ -21,6 +21,12 @@
 #include "pcerrc.h"
 #include "common.h"
 
+bool IsValidIp(unsigned long ip) {
+    return (ip != PERF_CONTEXT_HV && ip != PERF_CONTEXT_KERNEL && ip != PERF_CONTEXT_USER
+            && ip != PERF_CONTEXT_GUEST && ip != PERF_CONTEXT_GUEST_KERNEL
+            && ip != PERF_CONTEXT_GUEST_USER && ip != PERF_CONTEXT_MAX);
+}
+
 std::string GetRealPath(const std::string filePath)
 {
     char resolvedPath[PATH_MAX];
diff --git a/util/common.h b/util/common.h
index a5c629a4261f0504f2dc7d32eed9503aa71967f0..1e324a23298ffe827ad09311894f58d558017fb1 100644
--- a/util/common.h
+++ b/util/common.h
@@ -15,8 +15,10 @@
 
 #ifndef LIBKPROF_COMMON_H
 #define LIBKPROF_COMMON_H
+#include <linux/perf_event.h>
 #include <string>
 
+bool IsValidIp(unsigned long ip);
 std::string GetRealPath(const std::string filePath);
 bool IsValidPath(const std::string& filePath);
 int RaiseNumFd(uint64_t numFd);