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Date: Sat, 26 Apr 2008 21:38:54 +0200
From: Peter Zijlstra <a.p.zijlstra@...llo.nl>
To: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc: akpm@...ux-foundation.org, Ingo Molnar <mingo@...e.hu>,
linux-kernel@...r.kernel.org
Subject: Re: [patch 00/37] Linux Kernel Markers instrumentation for
sched-devel.git
On Thu, 2008-04-24 at 11:03 -0400, Mathieu Desnoyers wrote:
> Hi Ingo,
>
> Here is a rather large patchset applying kernel instrumentation to
> sched-devel.git. It includes, mainly :
I saw this land in sched-devel, how about this:
---
Subject: sched: de-uglyfy marker impact
These trace_mark() things look like someone puked all over the code,
lets hide the ugly bits.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
---
kernel/sched.c | 24 ++++++++----------------
kernel/sched_trace.h | 41 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 49 insertions(+), 16 deletions(-)
Index: linux-2.6-2/kernel/sched.c
===================================================================
--- linux-2.6-2.orig/kernel/sched.c
+++ linux-2.6-2/kernel/sched.c
@@ -71,7 +71,6 @@
#include <linux/debugfs.h>
#include <linux/ctype.h>
#include <linux/ftrace.h>
-#include <linux/marker.h>
#include <asm/tlb.h>
#include <asm/irq_regs.h>
@@ -745,6 +744,8 @@ static void update_rq_clock(struct rq *r
#define task_rq(p) cpu_rq(task_cpu(p))
#define cpu_curr(cpu) (cpu_rq(cpu)->curr)
+#include "sched_trace.h"
+
/*
* Tunables that become constants when CONFIG_SCHED_DEBUG is off:
*/
@@ -2258,8 +2259,7 @@ void wait_task_inactive(struct task_stru
* just go back and repeat.
*/
rq = task_rq_lock(p, &flags);
- trace_mark(kernel_sched_wait_task, "pid %d state %ld",
- p->pid, p->state);
+ trace_kernel_sched_wait(p);
running = task_running(rq, p);
on_rq = p->se.on_rq;
task_rq_unlock(rq, &flags);
@@ -2603,9 +2603,7 @@ out_activate:
success = 1;
out_running:
- trace_mark(kernel_sched_wakeup,
- "pid %d state %ld ## rq %p task %p rq->curr %p",
- p->pid, p->state, rq, p, rq->curr);
+ trace_kernel_sched_wakeup(rq, p);
check_preempt_curr(rq, p);
p->state = TASK_RUNNING;
@@ -2736,9 +2734,7 @@ void wake_up_new_task(struct task_struct
p->sched_class->task_new(rq, p);
inc_nr_running(rq);
}
- trace_mark(kernel_sched_wakeup_new,
- "pid %d state %ld ## rq %p task %p rq->curr %p",
- p->pid, p->state, rq, p, rq->curr);
+ trace_kernel_sched_wakeup_new(rq, p);
check_preempt_curr(rq, p);
#ifdef CONFIG_SMP
if (p->sched_class->task_wake_up)
@@ -2911,11 +2907,8 @@ context_switch(struct rq *rq, struct tas
struct mm_struct *mm, *oldmm;
prepare_task_switch(rq, prev, next);
- trace_mark(kernel_sched_schedule,
- "prev_pid %d next_pid %d prev_state %ld "
- "## rq %p prev %p next %p",
- prev->pid, next->pid, prev->state,
- rq, prev, next);
+
+ trace_kernel_sched_switch(rq, prev, next);
mm = next->mm;
oldmm = prev->active_mm;
/*
@@ -3148,8 +3141,7 @@ static void sched_migrate_task(struct ta
|| unlikely(cpu_is_offline(dest_cpu)))
goto out;
- trace_mark(kernel_sched_migrate_task, "pid %d state %ld dest_cpu %d",
- p->pid, p->state, dest_cpu);
+ trace_kernel_sched_migrate_task(p, cpu_of(rq), dest_cpu);
/* force the process onto the specified CPU */
if (migrate_task(p, dest_cpu, &req)) {
/* Need to wait for migration thread (might exit: take ref). */
Index: linux-2.6-2/kernel/sched_trace.h
===================================================================
--- /dev/null
+++ linux-2.6-2/kernel/sched_trace.h
@@ -0,0 +1,41 @@
+#include <linux/marker.h>
+
+static inline void trace_kernel_sched_wait(struct task_struct *p)
+{
+ trace_mark(kernel_sched_wait_task, "pid %d state %ld",
+ p->pid, p->state);
+}
+
+static inline
+void trace_kernel_sched_wakeup(struct rq *rq, struct task_struct *p)
+{
+ trace_mark(kernel_sched_wakeup,
+ "pid %d state %ld ## rq %p task %p rq->curr %p",
+ p->pid, p->state, rq, p, rq->curr);
+}
+
+static inline
+void trace_kernel_sched_wakeup_new(struct rq *rq, struct task_struct *p)
+{
+ trace_mark(kernel_sched_wakeup_new,
+ "pid %d state %ld ## rq %p task %p rq->curr %p",
+ p->pid, p->state, rq, p, rq->curr);
+}
+
+static inline void trace_kernel_sched_switch(struct rq *rq,
+ struct task_struct *prev, struct task_struct *next)
+{
+ trace_mark(kernel_sched_schedule,
+ "prev_pid %d next_pid %d prev_state %ld "
+ "## rq %p prev %p next %p",
+ prev->pid, next->pid, prev->state,
+ rq, prev, next);
+}
+
+static inline void
+trace_kernel_sched_migrate_task(struct task_struct *p, int src, int dst)
+{
+ trace_mark(kernel_sched_migrate_task,
+ "pid %d state %ld dest_cpu %d",
+ p->pid, p->state, dst);
+}
--
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