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Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

Browse source 
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (28 commits)
  perf session: Fix infinite loop in __perf_session__process_events
  perf evsel: Support perf_evsel__open(cpus > 1 && threads > 1)
  perf sched: Use PTHREAD_STACK_MIN to avoid pthread_attr_setstacksize() fail
  perf tools: Emit clearer message for sys_perf_event_open ENOENT return
  perf stat: better error message for unsupported events
  perf sched: Fix allocation result check
  perf, x86: P4 PMU - Fix unflagged overflows handling
  dynamic debug: Fix build issue with older gcc
  tracing: Fix TRACE_EVENT power tracepoint creation
  tracing: Fix preempt count leak
  tracepoint: Add __rcu annotation
  tracing: remove duplicate null-pointer check in skb tracepoint
  tracing/trivial: Add missing comma in TRACE_EVENT comment
  tracing: Include module.h in define_trace.h
  x86: Save rbp in pt_regs on irq entry
  x86, dumpstack: Fix unused variable warning
  x86, NMI: Clean-up default_do_nmi()
  x86, NMI: Allow NMI reason io port (0x61) to be processed on any CPU
  x86, NMI: Remove DIE_NMI_IPI
  x86, NMI: Add priorities to handlers
  ...
This commit is contained in:
Linus Torvalds 2011-01-11 11:02:13 -08:00
commit 42776163e1
38 changed files with 442 additions and 248 deletions
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1
kernel/Makefile
View file

@ -100,6 +100,7 @@ obj-$(CONFIG_FUNCTION_TRACER) += trace/
obj-$(CONFIG_TRACING) += trace/
obj-$(CONFIG_X86_DS) += trace/
obj-$(CONFIG_RING_BUFFER) += trace/
obj-$(CONFIG_TRACEPOINTS) += trace/
obj-$(CONFIG_SMP) += sched_cpupri.o
obj-$(CONFIG_IRQ_WORK) += irq_work.o
obj-$(CONFIG_PERF_EVENTS) += perf_event.o

14
kernel/exit.c
View file

@ -994,6 +994,15 @@ NORET_TYPE void do_exit(long code)
exit_fs(tsk);
check_stack_usage();
exit_thread();
/*
* Flush inherited counters to the parent - before the parent
* gets woken up by child-exit notifications.
*
* because of cgroup mode, must be called before cgroup_exit()
*/
perf_event_exit_task(tsk);
cgroup_exit(tsk, 1);
if (group_dead)
@ -1007,11 +1016,6 @@ NORET_TYPE void do_exit(long code)
* FIXME: do that only when needed, using sched_exit tracepoint
*/
flush_ptrace_hw_breakpoint(tsk);
/*
* Flush inherited counters to the parent - before the parent
* gets woken up by child-exit notifications.
*/
perf_event_exit_task(tsk);
exit_notify(tsk, group_dead);
#ifdef CONFIG_NUMA

82
kernel/perf_event.c
View file

@ -38,6 +38,12 @@
#include <asm/irq_regs.h>
enum event_type_t {
EVENT_FLEXIBLE = 0x1,
EVENT_PINNED = 0x2,
EVENT_ALL = EVENT_FLEXIBLE | EVENT_PINNED,
};
atomic_t perf_task_events __read_mostly;
static atomic_t nr_mmap_events __read_mostly;
static atomic_t nr_comm_events __read_mostly;
@ -65,6 +71,12 @@ int sysctl_perf_event_sample_rate __read_mostly = 100000;
static atomic64_t perf_event_id;
static void cpu_ctx_sched_out(struct perf_cpu_context *cpuctx,
enum event_type_t event_type);
static void cpu_ctx_sched_in(struct perf_cpu_context *cpuctx,
enum event_type_t event_type);
void __weak perf_event_print_debug(void) { }
extern __weak const char *perf_pmu_name(void)
@ -72,6 +84,11 @@ extern __weak const char *perf_pmu_name(void)
return "pmu";
}
static inline u64 perf_clock(void)
{
return local_clock();
}
void perf_pmu_disable(struct pmu *pmu)
{
int *count = this_cpu_ptr(pmu->pmu_disable_count);
@ -240,11 +257,6 @@ static void perf_unpin_context(struct perf_event_context *ctx)
put_ctx(ctx);
}
static inline u64 perf_clock(void)
{
return local_clock();
}
/*
* Update the record of the current time in a context.
*/
@ -256,6 +268,12 @@ static void update_context_time(struct perf_event_context *ctx)
ctx->timestamp = now;
}
static u64 perf_event_time(struct perf_event *event)
{
struct perf_event_context *ctx = event->ctx;
return ctx ? ctx->time : 0;
}
/*
* Update the total_time_enabled and total_time_running fields for a event.
*/
@ -269,7 +287,7 @@ static void update_event_times(struct perf_event *event)
return;
if (ctx->is_active)
run_end = ctx->time;
run_end = perf_event_time(event);
else
run_end = event->tstamp_stopped;
@ -278,7 +296,7 @@ static void update_event_times(struct perf_event *event)
if (event->state == PERF_EVENT_STATE_INACTIVE)
run_end = event->tstamp_stopped;
else
run_end = ctx->time;
run_end = perf_event_time(event);
event->total_time_running = run_end - event->tstamp_running;
}
@ -534,6 +552,7 @@ event_sched_out(struct perf_event *event,
struct perf_cpu_context *cpuctx,
struct perf_event_context *ctx)
{
u64 tstamp = perf_event_time(event);
u64 delta;
/*
* An event which could not be activated because of
@ -545,7 +564,7 @@ event_sched_out(struct perf_event *event,
&& !event_filter_match(event)) {
delta = ctx->time - event->tstamp_stopped;
event->tstamp_running += delta;
event->tstamp_stopped = ctx->time;
event->tstamp_stopped = tstamp;
}
if (event->state != PERF_EVENT_STATE_ACTIVE)
@ -556,7 +575,7 @@ event_sched_out(struct perf_event *event,
event->pending_disable = 0;
event->state = PERF_EVENT_STATE_OFF;
}
event->tstamp_stopped = ctx->time;
event->tstamp_stopped = tstamp;
event->pmu->del(event, 0);
event->oncpu = -1;
@ -768,6 +787,8 @@ event_sched_in(struct perf_event *event,
struct perf_cpu_context *cpuctx,
struct perf_event_context *ctx)
{
u64 tstamp = perf_event_time(event);
if (event->state <= PERF_EVENT_STATE_OFF)
return 0;
@ -784,9 +805,9 @@ event_sched_in(struct perf_event *event,
return -EAGAIN;
}
event->tstamp_running += ctx->time - event->tstamp_stopped;
event->tstamp_running += tstamp - event->tstamp_stopped;
event->shadow_ctx_time = ctx->time - ctx->timestamp;
event->shadow_ctx_time = tstamp - ctx->timestamp;
if (!is_software_event(event))
cpuctx->active_oncpu++;
@ -898,11 +919,13 @@ static int group_can_go_on(struct perf_event *event,
static void add_event_to_ctx(struct perf_event *event,
struct perf_event_context *ctx)
{
u64 tstamp = perf_event_time(event);
list_add_event(event, ctx);
perf_group_attach(event);
event->tstamp_enabled = ctx->time;
event->tstamp_running = ctx->time;
event->tstamp_stopped = ctx->time;
event->tstamp_enabled = tstamp;
event->tstamp_running = tstamp;
event->tstamp_stopped = tstamp;
}
/*
@ -937,7 +960,7 @@ static void __perf_install_in_context(void *info)
add_event_to_ctx(event, ctx);
if (event->cpu != -1 && event->cpu != smp_processor_id())
if (!event_filter_match(event))
goto unlock;
/*
@ -1042,14 +1065,13 @@ static void __perf_event_mark_enabled(struct perf_event *event,
struct perf_event_context *ctx)
{
struct perf_event *sub;
u64 tstamp = perf_event_time(event);
event->state = PERF_EVENT_STATE_INACTIVE;
event->tstamp_enabled = ctx->time - event->total_time_enabled;
event->tstamp_enabled = tstamp - event->total_time_enabled;
list_for_each_entry(sub, &event->sibling_list, group_entry) {
if (sub->state >= PERF_EVENT_STATE_INACTIVE) {
sub->tstamp_enabled =
ctx->time - sub->total_time_enabled;
}
if (sub->state >= PERF_EVENT_STATE_INACTIVE)
sub->tstamp_enabled = tstamp - sub->total_time_enabled;
}
}
@ -1082,7 +1104,7 @@ static void __perf_event_enable(void *info)
goto unlock;
__perf_event_mark_enabled(event, ctx);
if (event->cpu != -1 && event->cpu != smp_processor_id())
if (!event_filter_match(event))
goto unlock;
/*
@ -1193,12 +1215,6 @@ static int perf_event_refresh(struct perf_event *event, int refresh)
return 0;
}
enum event_type_t {
EVENT_FLEXIBLE = 0x1,
EVENT_PINNED = 0x2,
EVENT_ALL = EVENT_FLEXIBLE | EVENT_PINNED,
};
static void ctx_sched_out(struct perf_event_context *ctx,
struct perf_cpu_context *cpuctx,
enum event_type_t event_type)
@ -1435,7 +1451,7 @@ ctx_pinned_sched_in(struct perf_event_context *ctx,
list_for_each_entry(event, &ctx->pinned_groups, group_entry) {
if (event->state <= PERF_EVENT_STATE_OFF)
continue;
if (event->cpu != -1 && event->cpu != smp_processor_id())
if (!event_filter_match(event))
continue;
if (group_can_go_on(event, cpuctx, 1))
@ -1467,7 +1483,7 @@ ctx_flexible_sched_in(struct perf_event_context *ctx,
* Listen to the 'cpu' scheduling filter constraint
* of events:
*/
if (event->cpu != -1 && event->cpu != smp_processor_id())
if (!event_filter_match(event))
continue;
if (group_can_go_on(event, cpuctx, can_add_hw)) {
@ -1694,7 +1710,7 @@ static void perf_ctx_adjust_freq(struct perf_event_context *ctx, u64 period)
if (event->state != PERF_EVENT_STATE_ACTIVE)
continue;
if (event->cpu != -1 && event->cpu != smp_processor_id())
if (!event_filter_match(event))
continue;
hwc = &event->hw;
@ -3893,7 +3909,7 @@ static int perf_event_task_match(struct perf_event *event)
if (event->state < PERF_EVENT_STATE_INACTIVE)
return 0;
if (event->cpu != -1 && event->cpu != smp_processor_id())
if (!event_filter_match(event))
return 0;
if (event->attr.comm || event->attr.mmap ||
@ -4030,7 +4046,7 @@ static int perf_event_comm_match(struct perf_event *event)
if (event->state < PERF_EVENT_STATE_INACTIVE)
return 0;
if (event->cpu != -1 && event->cpu != smp_processor_id())
if (!event_filter_match(event))
return 0;
if (event->attr.comm)
@ -4178,7 +4194,7 @@ static int perf_event_mmap_match(struct perf_event *event,
if (event->state < PERF_EVENT_STATE_INACTIVE)
return 0;
if (event->cpu != -1 && event->cpu != smp_processor_id())
if (!event_filter_match(event))
return 0;
if ((!executable && event->attr.mmap_data) ||

2
kernel/trace/Makefile
View file

@ -52,7 +52,7 @@ obj-$(CONFIG_EVENT_TRACING) += trace_event_perf.o
endif
obj-$(CONFIG_EVENT_TRACING) += trace_events_filter.o
obj-$(CONFIG_KPROBE_EVENT) += trace_kprobe.o
obj-$(CONFIG_EVENT_TRACING) += power-traces.o
obj-$(CONFIG_TRACEPOINTS) += power-traces.o
ifeq ($(CONFIG_TRACING),y)
obj-$(CONFIG_KGDB_KDB) += trace_kdb.o
endif

6
kernel/trace/trace.c
View file

@ -1313,12 +1313,10 @@ ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, int pc)
__this_cpu_inc(user_stack_count);
event = trace_buffer_lock_reserve(buffer, TRACE_USER_STACK,
sizeof(*entry), flags, pc);
if (!event)
return;
goto out_drop_count;
entry = ring_buffer_event_data(event);
entry->tgid = current->tgid;
@ -1333,8 +1331,8 @@ ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, int pc)
if (!filter_check_discard(call, entry, buffer, event))
ring_buffer_unlock_commit(buffer, event);
out_drop_count:
__this_cpu_dec(user_stack_count);
out:
preempt_enable();
}