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authorMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>2008-11-14 17:47:47 -0500
committerIngo Molnar <mingo@elte.hu>2008-11-16 09:01:36 +0100
commit7e066fb870fcd1025ec3ba7bbde5d541094f4ce1 (patch)
tree52acda06de25c029b9834110d7bf6b4abc50353b /kernel
parent32f85742778dfc2c74975cf0b9f5bdb13470cb32 (diff)
downloadop-kernel-dev-7e066fb870fcd1025ec3ba7bbde5d541094f4ce1.zip
op-kernel-dev-7e066fb870fcd1025ec3ba7bbde5d541094f4ce1.tar.gz
tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()
Impact: API *CHANGE*. Must update all tracepoint users. Add DEFINE_TRACE() to tracepoints to let them declare the tracepoint structure in a single spot for all the kernel. It helps reducing memory consumption, especially when declaring a lot of tracepoints, e.g. for kmalloc tracing. *API CHANGE WARNING*: now, DECLARE_TRACE() must be used in headers for tracepoint declarations rather than DEFINE_TRACE(). This is the sane way to do it. The name previously used was misleading. Updates scheduler instrumentation to follow this API change. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/exit.c4
-rw-r--r--kernel/fork.c2
-rw-r--r--kernel/kthread.c3
-rw-r--r--kernel/sched.c6
-rw-r--r--kernel/signal.c2
5 files changed, 17 insertions, 0 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index ae2b92b..f995d24 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -54,6 +54,10 @@
#include <asm/pgtable.h>
#include <asm/mmu_context.h>
+DEFINE_TRACE(sched_process_free);
+DEFINE_TRACE(sched_process_exit);
+DEFINE_TRACE(sched_process_wait);
+
static void exit_mm(struct task_struct * tsk);
static inline int task_detached(struct task_struct *p)
diff --git a/kernel/fork.c b/kernel/fork.c
index f608356..0837d0d 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -79,6 +79,8 @@ DEFINE_PER_CPU(unsigned long, process_counts) = 0;
__cacheline_aligned DEFINE_RWLOCK(tasklist_lock); /* outer */
+DEFINE_TRACE(sched_process_fork);
+
int nr_processes(void)
{
int cpu;
diff --git a/kernel/kthread.c b/kernel/kthread.c
index 8e7a7ce..4fbc456 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -21,6 +21,9 @@ static DEFINE_SPINLOCK(kthread_create_lock);
static LIST_HEAD(kthread_create_list);
struct task_struct *kthreadd_task;
+DEFINE_TRACE(sched_kthread_stop);
+DEFINE_TRACE(sched_kthread_stop_ret);
+
struct kthread_create_info
{
/* Information passed to kthread() from kthreadd. */
diff --git a/kernel/sched.c b/kernel/sched.c
index 50a21f9..327f91c 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -118,6 +118,12 @@
*/
#define RUNTIME_INF ((u64)~0ULL)
+DEFINE_TRACE(sched_wait_task);
+DEFINE_TRACE(sched_wakeup);
+DEFINE_TRACE(sched_wakeup_new);
+DEFINE_TRACE(sched_switch);
+DEFINE_TRACE(sched_migrate_task);
+
#ifdef CONFIG_SMP
/*
* Divide a load by a sched group cpu_power : (load / sg->__cpu_power)
diff --git a/kernel/signal.c b/kernel/signal.c
index 4530fc6..e9afe63 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -41,6 +41,8 @@
static struct kmem_cache *sigqueue_cachep;
+DEFINE_TRACE(sched_signal_send);
+
static void __user *sig_handler(struct task_struct *t, int sig)
{
return t->sighand->action[sig - 1].sa.sa_handler;
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