ucli perf software irq

1 files changed, 29 insertions, 21 deletions

diff --git a/source/module/monitor_perf.c b/source/module/monitor_perf.c
index 549d7ac..76df6f3 100644
--- a/source/module/monitor_perf.c
+++ b/source/module/monitor_perf.c
@@ -3,13 +3,15 @@
 static struct perf_event *pe;
 
 void vm_perf_overflow_callback(struct perf_event *event,
-                             struct perf_sample_data *data,
-                             struct pt_regs *regs) {
+                               struct perf_sample_data *data,
+                               struct pt_regs *regs) {
   // handle perf event data
   // struct perf_callchain_entry *callchain;
   // int nr, i;
 
   pr_info("perf event callback\n");
+  
+  // perf_event_disable(event);
 
   // 如果 perf_sample_data 有调用堆栈信息
   // if (data->callchain) {
@@ -42,10 +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_CPU_CLOCK,
+    .config = PERF_COUNT_SW_DUMMY,
     .sample_period = 1,
     .sample_type = PERF_SAMPLE_CALLCHAIN,
-    // .disabled = 1,
+    .disabled = 1,
 };
 
 #include <linux/cpumask.h>
@@ -61,32 +63,38 @@ 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)) {
-      *event = NULL;
-      continue;
-    }
-    *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;
-    }
-  }
+  // 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);
+  // }
 
   // pe = perf_event_create_kernel_counter(&pea, tsk->on_cpu, tsk,
   //                                         vm_perf_callback, NULL);
-  pe = perf_event_create_kernel_counter(&pea, tsk->on_cpu, tsk,
+  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
 }
 
 /**