diff options
| -rw-r--r-- | drivers/oprofile/buffer_sync.c | 23 | ||||
| -rw-r--r-- | drivers/oprofile/cpu_buffer.c | 14 | ||||
| -rw-r--r-- | drivers/oprofile/cpu_buffer.h | 2 |
3 files changed, 25 insertions, 14 deletions
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c index 21fd249b6e0..908202afbae 100644 --- a/drivers/oprofile/buffer_sync.c +++ b/drivers/oprofile/buffer_sync.c @@ -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 */ diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c index 934ff159e70..400f7fcffdb 100644 --- a/drivers/oprofile/cpu_buffer.c +++ b/drivers/oprofile/cpu_buffer.c @@ -182,20 +182,28 @@ int op_cpu_buffer_write_commit(struct op_entry *entry) entry->irq_flags); } -struct op_sample *op_cpu_buffer_read_entry(int cpu) +struct op_sample *op_cpu_buffer_read_entry(struct op_entry *entry, int cpu) { struct ring_buffer_event *e; e = ring_buffer_consume(op_ring_buffer_read, cpu, NULL); if (e) - return ring_buffer_event_data(e); + goto event; if (ring_buffer_swap_cpu(op_ring_buffer_read, op_ring_buffer_write, cpu)) return NULL; e = ring_buffer_consume(op_ring_buffer_read, cpu, NULL); if (e) - return ring_buffer_event_data(e); + goto event; return NULL; + +event: + entry->event = e; + entry->sample = ring_buffer_event_data(e); + entry->size = (ring_buffer_event_length(e) - sizeof(struct op_sample)) + / sizeof(entry->sample->data[0]); + entry->data = entry->sample->data; + return entry->sample; } unsigned long op_cpu_buffer_entries(int cpu) diff --git a/drivers/oprofile/cpu_buffer.h b/drivers/oprofile/cpu_buffer.h index 2d4bfdeb7fb..d7c0545ef8b 100644 --- a/drivers/oprofile/cpu_buffer.h +++ b/drivers/oprofile/cpu_buffer.h @@ -75,7 +75,7 @@ static inline void op_cpu_buffer_reset(int cpu) struct op_sample *op_cpu_buffer_write_reserve(struct op_entry *entry, unsigned long size); int op_cpu_buffer_write_commit(struct op_entry *entry); -struct op_sample *op_cpu_buffer_read_entry(int cpu); +struct op_sample *op_cpu_buffer_read_entry(struct op_entry *entry, int cpu); unsigned long op_cpu_buffer_entries(int cpu); /* transient events for the CPU buffer -> event buffer */ |