From 05d78776ad73e8c8916f8d45ba4d19a74cde231e Mon Sep 17 00:00:00 2001
From: zy <zhangyang@geedgenetworks.com>
Date: Thu, 14 Dec 2023 21:46:11 -0500
Subject: [PATCH] vm_perf_overflow_callback have meassage

---
 source/module/monitor_perf.c | 59 ++++++++++++++++++------------------
 1 file changed, 30 insertions(+), 29 deletions(-)

diff --git a/source/module/monitor_perf.c b/source/module/monitor_perf.c
index b91b930..63e4bb8 100644
--- a/source/module/monitor_perf.c
+++ b/source/module/monitor_perf.c
@@ -44,10 +44,10 @@ void vm_perf_overflow_callback(struct perf_event *event,
 struct perf_event_attr pea = {
     .type = PERF_TYPE_SOFTWARE,
     .size = sizeof(struct perf_event_attr),
-    .config = PERF_COUNT_SW_DUMMY,
+    .config = PERF_COUNT_SW_CPU_CLOCK,
     .sample_period = 1,
     .sample_type = PERF_SAMPLE_CALLCHAIN,
-    // .disabled = 1,
+    .disabled = 1,
 };
 
 #include <linux/cpumask.h>
@@ -63,38 +63,39 @@ void setup_perf_event_for_task(struct task_struct *tsk) {
     pr_info("Perf event already created\n");
     return;
   }
-  int cpu;
-  struct perf_event **events;
-  for_each_possible_cpu(cpu) {
-    struct perf_event **event = per_cpu_ptr(events, cpu);
-    if (cpu_is_offline(cpu)) {
-      pr_info("cpu %d is offline\n", cpu);
-      *event = NULL;
-      continue;
-    }
-    *event = perf_event_create_kernel_counter(&pea, cpu, tsk,
-                                              vm_perf_overflow_callback, NULL);
+  
+  // int cpu;
+  // struct perf_event **events;
+  // for_each_possible_cpu(cpu) {
+  //   struct perf_event **event = per_cpu_ptr(events, cpu);
+  //   if (cpu_is_offline(cpu)) {
+  //     pr_info("cpu %d is offline\n", cpu);
+  //     *event = NULL;
+  //     continue;
+  //   }
+  //   *event = perf_event_create_kernel_counter(&pea, cpu, tsk,
+  //                                             vm_perf_overflow_callback, NULL);
 
-    // perf_event_create_kernel_counter(&pea, cpu, tsk,
-    // vm_perf_overflow_callback,
-    //                                  NULL);
-    if (IS_ERR(*event)) {
-      printk(KERN_INFO "create perf event failure\n");
-      // return -1;
-    }
-    // perf_event_enable(*event);
-  }
+  //   // perf_event_create_kernel_counter(&pea, cpu, tsk,
+  //   // vm_perf_overflow_callback,
+  //   //                                  NULL);
+  //   if (IS_ERR(*event)) {
+  //     printk(KERN_INFO "create perf event failure\n");
+  //     // return -1;
+  //   }
+  //   perf_event_enable(*event);
+  // }
 
   // pe = perf_event_create_kernel_counter(&pea, tsk->on_cpu, tsk,
   //                                         vm_perf_overflow_callback, NULL);
-  // // pe = perf_event_create_kernel_counter(&pea, -1, tsk,
-  // //                                       vm_perf_overflow_callback, NULL);
-  // if (IS_ERR(pe)) {
-  //   pr_info("Error in perf_event_create_kernel_counter\n");
-  //   return;
-  // }
+  pe = perf_event_create_kernel_counter(&pea, -1, tsk,
+                                        vm_perf_overflow_callback, NULL);
+  if (IS_ERR(pe)) {
+    pr_info("Error in perf_event_create_kernel_counter\n");
+    return;
+  }
 
-  // perf_event_enable(pe); // enable perf event
+  perf_event_enable(pe); // enable perf event
 }
 
 /**