/**
* @file buffer_sync.c
*
- * @remark Copyright 2002 OProfile authors
+ * @remark Copyright 2002-2009 OProfile authors
* @remark Read the file COPYING
*
* @author John Levon <levon@movementarian.org>
* @author Barry Kasindorf
+ * @author Robert Richter <robert.richter@amd.com>
*
* This is the core of the buffer management. Each
* CPU buffer is processed and entered into the
static LIST_HEAD(dying_tasks);
static LIST_HEAD(dead_tasks);
-static cpumask_t marked_cpus = CPU_MASK_NONE;
+static cpumask_var_t marked_cpus;
static DEFINE_SPINLOCK(task_mortuary);
static void process_task_mortuary(void);
{
int err;
+ if (!zalloc_cpumask_var(&marked_cpus, GFP_KERNEL))
+ return -ENOMEM;
+
start_cpu_work();
err = task_handoff_register(&task_free_nb);
task_handoff_unregister(&task_free_nb);
out1:
end_sync();
+ free_cpumask_var(marked_cpus);
goto out;
}
profile_event_unregister(PROFILE_TASK_EXIT, &task_exit_nb);
task_handoff_unregister(&task_free_nb);
end_sync();
+ free_cpumask_var(marked_cpus);
}
{
unsigned long cookie;
- if (path->dentry->d_cookie)
+ if (path->dentry->d_flags & DCACHE_COOKIE)
return (unsigned long)path->dentry;
get_dcookie(path, &cookie);
return cookie;
add_event_entry(TRACE_BEGIN_CODE);
}
-#ifdef CONFIG_OPROFILE_IBS
-
-#define IBS_FETCH_CODE_SIZE 2
-#define IBS_OP_CODE_SIZE 5
-
-/*
- * Add IBS fetch and op entries to event buffer
- */
-static void add_ibs_begin(int cpu, int code, struct mm_struct *mm)
+static void add_data(struct op_entry *entry, struct mm_struct *mm)
{
- unsigned long rip;
- int i, count;
- unsigned long ibs_cookie = 0;
+ unsigned long code, pc, val;
+ unsigned long cookie;
off_t offset;
- struct op_sample *sample;
- sample = op_cpu_buffer_read_entry(cpu);
- if (!sample)
- goto Error;
- rip = sample->eip;
-
-#ifdef __LP64__
- rip += sample->event << 32;
-#endif
+ if (!op_cpu_buffer_get_data(entry, &code))
+ return;
+ if (!op_cpu_buffer_get_data(entry, &pc))
+ return;
+ if (!op_cpu_buffer_get_size(entry))
+ return;
if (mm) {
- ibs_cookie = lookup_dcookie(mm, rip, &offset);
+ cookie = lookup_dcookie(mm, pc, &offset);
- if (ibs_cookie == NO_COOKIE)
- offset = rip;
- if (ibs_cookie == INVALID_COOKIE) {
+ if (cookie == NO_COOKIE)
+ offset = pc;
+ if (cookie == INVALID_COOKIE) {
atomic_inc(&oprofile_stats.sample_lost_no_mapping);
- offset = rip;
+ offset = pc;
}
- if (ibs_cookie != last_cookie) {
- add_cookie_switch(ibs_cookie);
- last_cookie = ibs_cookie;
+ if (cookie != last_cookie) {
+ add_cookie_switch(cookie);
+ last_cookie = cookie;
}
} else
- offset = rip;
+ offset = pc;
add_event_entry(ESCAPE_CODE);
add_event_entry(code);
add_event_entry(offset); /* Offset from Dcookie */
- /* we send the Dcookie offset, but send the raw Linear Add also*/
- add_event_entry(sample->eip);
- add_event_entry(sample->event);
-
- if (code == IBS_FETCH_CODE)
- count = IBS_FETCH_CODE_SIZE; /*IBS FETCH is 2 int64s*/
- else
- count = IBS_OP_CODE_SIZE; /*IBS OP is 5 int64s*/
-
- for (i = 0; i < count; i++) {
- sample = op_cpu_buffer_read_entry(cpu);
- if (!sample)
- goto Error;
- add_event_entry(sample->eip);
- add_event_entry(sample->event);
- }
-
- return;
-
-Error:
- return;
+ while (op_cpu_buffer_get_data(entry, &val))
+ add_event_entry(val);
}
-#endif
-
-static void add_sample_entry(unsigned long offset, unsigned long event)
+static inline void add_sample_entry(unsigned long offset, unsigned long event)
{
add_event_entry(offset);
add_event_entry(event);
{
int i;
- cpu_set(cpu, marked_cpus);
+ cpumask_set_cpu(cpu, marked_cpus);
for_each_online_cpu(i) {
- if (!cpu_isset(i, marked_cpus))
+ if (!cpumask_test_cpu(i, marked_cpus))
return;
}
*/
process_task_mortuary();
- cpus_clear(marked_cpus);
+ cpumask_clear(marked_cpus);
}
{
struct mm_struct *mm = NULL;
struct mm_struct *oldmm;
+ unsigned long val;
struct task_struct *new;
unsigned long cookie = 0;
int in_kernel = 1;
sync_buffer_state state = sb_buffer_start;
unsigned int i;
unsigned long available;
+ unsigned long flags;
+ struct op_entry entry;
+ struct op_sample *sample;
mutex_lock(&buffer_mutex);
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) {
- case 0:
- case CPU_IS_KERNEL:
+ if (is_code(sample->eip)) {
+ flags = sample->event;
+ if (flags & TRACE_BEGIN) {
+ state = sb_bt_start;
+ add_trace_begin();
+ }
+ if (flags & KERNEL_CTX_SWITCH) {
/* kernel/userspace switch */
- in_kernel = s->event;
+ in_kernel = flags & IS_KERNEL;
if (state == sb_buffer_start)
state = sb_sample_start;
- add_kernel_ctx_switch(s->event);
- break;
- case CPU_TRACE_BEGIN:
- state = sb_bt_start;
- add_trace_begin();
- break;
-#ifdef CONFIG_OPROFILE_IBS
- case IBS_FETCH_BEGIN:
- state = sb_bt_start;
- add_ibs_begin(cpu, IBS_FETCH_CODE, mm);
- break;
- case IBS_OP_BEGIN:
- state = sb_bt_start;
- add_ibs_begin(cpu, IBS_OP_CODE, mm);
- break;
-#endif
- default:
+ add_kernel_ctx_switch(flags & IS_KERNEL);
+ }
+ if (flags & USER_CTX_SWITCH
+ && op_cpu_buffer_get_data(&entry, &val)) {
/* userspace context switch */
+ new = (struct task_struct *)val;
oldmm = mm;
- new = (struct task_struct *)s->event;
release_mm(oldmm);
mm = take_tasks_mm(new);
if (mm != oldmm)
cookie = get_exec_dcookie(mm);
add_user_ctx_switch(new, cookie);
- break;
}
+ if (op_cpu_buffer_get_size(&entry))
+ add_data(&entry, mm);
continue;
}
/* 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 */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff