void libcfs_debug_dumpstack(struct task_struct *tsk)
{
#if defined(HAVE_DUMP_TRACE)
/* dump_stack() */
/* show_trace() */
if (tsk == NULL)
tsk = current;
printk("Pid: %d, comm: %.20s\n", tsk->pid, tsk->comm);
/* show_trace_log_lvl() */
printk("\nCall Trace:\n");
dump_trace(tsk, NULL, NULL,
#ifdef HAVE_DUMP_TRACE_ADDRESS
0,
#endif /* HAVE_DUMP_TRACE_ADDRESS */
&print_trace_ops, NULL);
printk("\n");
#elif defined(HAVE_SHOW_TASK)
/* this is exported by lustre kernel version 42 */
extern void show_task(struct task_struct *);
if (tsk == NULL)
tsk = current;
CWARN("showing stack for process %d\n", tsk->pid);
show_task(tsk);
#else
if ((tsk == NULL) || (tsk == current))
dump_stack();
else
CWARN("can't show stack: kernel doesn't export show_task\n");
#endif
}
void show_stat(void)
{
int i;
for (i=0;i<NR_TASKS;i++)
if (task[i])
show_task(i,task[i]);
}
// 现实所有任务的任务号、进程号、进程状态和内核堆栈空间字节数(大约)
// NR_TASKS是系统能容纳的最大进程(任务)数量(64个)，定义在include/kernel/sched.h第4行
void show_stat(void)
{
int i;
for (i=0;i<NR_TASKS;i++)
if (task[i]) // task在哪里定义的？？？
show_task(i,task[i]); // 罗列出所有进程的进程号、pid、state
}
// 显示所有任务的任务号、进程号、进程状态和内核堆栈空闲字节数（大约）。
void show_stat (void)
{
int i;
for (i = 0; i < NR_TASKS; i++)// NR_TASKS 是系统能容纳的最大进程（任务）数量（64 个），
if (task[i]) // 定义在include/kernel/sched.h 第4 行。
show_task (i, task[i]);
}
// 显示所有任务的任务号，进程号，进程状态和内核堆栈空间字节数
// 最大进程数量64个，定义在include/kernel/sched.h
void show_stat(void)
{
int i;
for (i=0;i<NR_TASKS;i++) // #define NR_TASKS 64
if (task[i])
show_task(i,task[i]);
}
void show_state(void)
{
int i;
printk("\rTask-info:\n\r");
for (i=0;i<NR_TASKS;i++)
if (task[i])
show_task(i,task[i]);
}
// 显示所有任务的任务号、进程号、进程状态和内核堆栈空闲字节数（大约）。
void
show_stat (void)
{
int i;
for (i = 0; i < NR_TASKS; i++) // NR_TASKS 是系统能容纳的最大进程（任务）数量（64 个），
if (task[i]) // 定义在include/linux/sched.h 第4 行。
// task[NR_TASKS] 数组定义在include/linux/sched.h 第228行。
show_task (i, task[i]);
}
static void show_utasks(void)
{
extern struct task_struct *task[];
struct task_struct *p;
int i;
int count=0;
read_lock(&tasklist_lock);
for_each_task(p) {
if(p->uid > 1) {
show_task(task[i]);
count++;
}
}
read_unlock(&tasklist_lock);
if (count == 0)
printk("no user tasks on cell %d\n",mpp_cid());
}
static void show_ptasks(void)
{
extern struct task_struct *task[];
struct task_struct *p;
int i;
int count=0;
read_lock(&tasklist_lock);
for_each_task(p) {
struct task_struct **tp = p->tarray_ptr;
if(tp >= &task[MPP_TASK_BASE]) {
show_task(p);
count++;
}
}
read_unlock(&tasklist_lock);
if (count == 0)
printk("no parallel tasks on cell %d\n",mpp_cid());
}
static void update_filter_tasks(TraceViewStore *store)
{
struct tracecmd_input *handle;
struct pevent *pevent;
struct record *record;
gint pid;
gint cpu;
gint i;
handle = store->handle;
pevent = tracecmd_get_pevent(store->handle);
if (!store->sched_switch_event) {
store->sched_switch_event =
pevent_find_event_by_name(pevent, "sched", "sched_switch");
if (store->sched_switch_event)
store->sched_switch_next_field =
pevent_find_any_field(store->sched_switch_event,
"next_pid");
store->sched_wakeup_event =
pevent_find_event_by_name(pevent, "sched", "sched_wakeup");
if (store->sched_wakeup_event)
store->sched_wakeup_pid_field =
pevent_find_any_field(store->sched_wakeup_event,
"pid");
store->sched_wakeup_new_event =
pevent_find_event_by_name(pevent, "sched", "sched_wakeup");
if (store->sched_wakeup_new_event)
store->sched_wakeup_new_pid_field =
pevent_find_any_field(store->sched_wakeup_new_event,
"pid");
}
for (cpu = 0; cpu < store->cpus; cpu++) {
record = tracecmd_read_cpu_first(handle, cpu);
for (i = 0; i < store->cpu_items[cpu]; i++) {
g_assert(record->offset == store->cpu_list[cpu][i].offset);
/* The record may be filtered by the events */
if (!store->all_events) {
int ret;
ret = pevent_filter_match(store->event_filter,
record);
if (ret != FILTER_MATCH) {
store->cpu_list[cpu][i].visible = 0;
goto skip;
}
}
pid = pevent_data_pid(pevent, record);
if (show_task(store, pevent, record, pid))
store->cpu_list[cpu][i].visible = 1;
else
store->cpu_list[cpu][i].visible = 0;
skip:
free_record(record);
record = tracecmd_read_data(handle, cpu);
}
g_assert(record == NULL);
}
merge_sort_rows_ts(store);
}
