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oprofile: implement switch/case in buffer_sync.c 

Signed-off-by: Robert Richter <robert.richter@amd.com>
This commit is contained in:
Robert Richter 2008-09-26 17:50:31 -04:00
parent fe615cbf34
commit fd7826d56b
1 changed files with 14 additions and 8 deletions
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22
drivers/oprofile/buffer_sync.c
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@ -561,6 +561,7 @@ void sync_buffer(int cpu)
{ {
struct oprofile_cpu_buffer *cpu_buf = &per_cpu(cpu_buffer, cpu); struct oprofile_cpu_buffer *cpu_buf = &per_cpu(cpu_buffer, cpu);
struct mm_struct *mm = NULL; struct mm_struct *mm = NULL;
struct mm_struct *oldmm;
struct task_struct *new; struct task_struct *new;
unsigned long cookie = 0; unsigned long cookie = 0;
int in_kernel = 1; int in_kernel = 1;
@ -586,34 +587,39 @@ void sync_buffer(int cpu)
struct op_sample *s = &cpu_buf->buffer[cpu_buf->tail_pos]; struct op_sample *s = &cpu_buf->buffer[cpu_buf->tail_pos];
if (is_code(s->eip)) { if (is_code(s->eip)) {
if (s->event <= CPU_IS_KERNEL) { switch (s->event) {
case 0:
case CPU_IS_KERNEL:
/* kernel/userspace switch */ /* kernel/userspace switch */
in_kernel = s->event; in_kernel = s->event;
if (state == sb_buffer_start) if (state == sb_buffer_start)
state = sb_sample_start; state = sb_sample_start;
add_kernel_ctx_switch(s->event); add_kernel_ctx_switch(s->event);
} else if (s->event == CPU_TRACE_BEGIN) { break;
case CPU_TRACE_BEGIN:
state = sb_bt_start; state = sb_bt_start;
add_trace_begin(); add_trace_begin();
break;
#ifdef CONFIG_OPROFILE_IBS #ifdef CONFIG_OPROFILE_IBS
} else if (s->event == IBS_FETCH_BEGIN) { case IBS_FETCH_BEGIN:
state = sb_bt_start; state = sb_bt_start;
add_ibs_begin(cpu_buf, IBS_FETCH_CODE, mm); add_ibs_begin(cpu_buf, IBS_FETCH_CODE, mm);
} else if (s->event == IBS_OP_BEGIN) { break;
case IBS_OP_BEGIN:
state = sb_bt_start; state = sb_bt_start;
add_ibs_begin(cpu_buf, IBS_OP_CODE, mm); add_ibs_begin(cpu_buf, IBS_OP_CODE, mm);
break;
#endif #endif
} else { default:
struct mm_struct *oldmm = mm;
/* userspace context switch */ /* userspace context switch */
oldmm = mm;
new = (struct task_struct *)s->event; new = (struct task_struct *)s->event;
release_mm(oldmm); release_mm(oldmm);
mm = take_tasks_mm(new); mm = take_tasks_mm(new);
if (mm != oldmm) if (mm != oldmm)
cookie = get_exec_dcookie(mm); cookie = get_exec_dcookie(mm);
add_user_ctx_switch(new, cookie); add_user_ctx_switch(new, cookie);
break;
} }
} else if (state >= sb_bt_start && } else if (state >= sb_bt_start &&
!add_sample(mm, s, in_kernel)) { !add_sample(mm, s, in_kernel)) {