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oprofile: modify op_cpu_buffer_read_entry()

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This implements the support of samples with attached data.

Signed-off-by: Robert Richter <robert.richter@amd.com>
This commit is contained in:
Robert Richter
2008-12-30 04:10:46 +01:00
parent 2cc28b9f26
commit 2d87b14cf8
3 changed files with 25 additions and 14 deletions
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23
drivers/oprofile/buffer_sync.c
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@@ -329,9 +329,10 @@ static void add_ibs_begin(int cpu, int code, struct mm_struct *mm)
int i, count;
unsigned long cookie = 0;
off_t offset;
struct op_entry entry;
struct op_sample *sample;
sample = op_cpu_buffer_read_entry(cpu);
sample = op_cpu_buffer_read_entry(&entry, cpu);
if (!sample)
return;
pc = sample->eip;
@@ -370,7 +371,7 @@ static void add_ibs_begin(int cpu, int code, struct mm_struct *mm)
count = IBS_OP_CODE_SIZE; /*IBS OP is 5 int64s*/
for (i = 0; i < count; i++) {
sample = op_cpu_buffer_read_entry(cpu);
sample = op_cpu_buffer_read_entry(&entry, cpu);
if (!sample)
return;
add_event_entry(sample->eip);
@@ -528,6 +529,8 @@ void sync_buffer(int cpu)
sync_buffer_state state = sb_buffer_start;
unsigned int i;
unsigned long available;
struct op_entry entry;
struct op_sample *sample;
mutex_lock(&buffer_mutex);
@@ -537,19 +540,19 @@ void sync_buffer(int cpu)
available = op_cpu_buffer_entries(cpu);
for (i = 0; i < available; ++i) {
struct op_sample *s = op_cpu_buffer_read_entry(cpu);
if (!s)
sample = op_cpu_buffer_read_entry(&entry, cpu);
if (!sample)
break;
if (is_code(s->eip)) {
switch (s->event) {
if (is_code(sample->eip)) {
switch (sample->event) {
case 0:
case CPU_IS_KERNEL:
/* kernel/userspace switch */
in_kernel = s->event;
in_kernel = sample->event;
if (state == sb_buffer_start)
state = sb_sample_start;
add_kernel_ctx_switch(s->event);
add_kernel_ctx_switch(sample->event);
break;
case CPU_TRACE_BEGIN:
state = sb_bt_start;
@@ -566,7 +569,7 @@ void sync_buffer(int cpu)
default:
/* userspace context switch */
oldmm = mm;
new = (struct task_struct *)s->event;
new = (struct task_struct *)sample->event;
release_mm(oldmm);
mm = take_tasks_mm(new);
if (mm != oldmm)
@@ -581,7 +584,7 @@ void sync_buffer(int cpu)
/* ignore sample */
continue;
if (add_sample(mm, s, in_kernel))
if (add_sample(mm, sample, in_kernel))
continue;
/* ignore backtraces if failed to add a sample */