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Subject[PATCH 21/23 -v6] Add markers to various events
This patch adds markers to various events in the kernel.
(interrupts, task activation and hrtimers)

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
---
arch/x86/kernel/apic_32.c | 2 ++
arch/x86/kernel/irq_32.c | 1 +
arch/x86/kernel/irq_64.c | 2 ++
arch/x86/kernel/traps_32.c | 2 ++
arch/x86/kernel/traps_64.c | 2 ++
arch/x86/mm/fault_32.c | 3 +++
arch/x86/mm/fault_64.c | 3 +++
kernel/hrtimer.c | 7 +++++++
kernel/sched.c | 11 +++++++++++
9 files changed, 33 insertions(+)
Index: linux-mcount.git/arch/x86/kernel/apic_32.c
===================================================================
--- linux-mcount.git.orig/arch/x86/kernel/apic_32.c 2008-01-25 21:47:15.000000000 -0500
+++ linux-mcount.git/arch/x86/kernel/apic_32.c 2008-01-25 21:47:38.000000000 -0500
@@ -581,6 +581,8 @@ notrace fastcall void smp_apic_timer_int
{
struct pt_regs *old_regs = set_irq_regs(regs);

+ trace_mark(arch_apic_timer, "ip %lx", regs->eip);
+
/*
* NOTE! We'd better ACK the irq immediately,
* because timer handling can be slow.
Index: linux-mcount.git/arch/x86/kernel/irq_32.c
===================================================================
--- linux-mcount.git.orig/arch/x86/kernel/irq_32.c 2008-01-25 21:46:48.000000000 -0500
+++ linux-mcount.git/arch/x86/kernel/irq_32.c 2008-01-25 21:47:38.000000000 -0500
@@ -85,6 +85,7 @@ fastcall unsigned int do_IRQ(struct pt_r

old_regs = set_irq_regs(regs);
irq_enter();
+ trace_mark(arch_do_irq, "ip %lx irq %d", regs->eip, irq);
#ifdef CONFIG_DEBUG_STACKOVERFLOW
/* Debugging check for stack overflow: is there less than 1KB free? */
{
Index: linux-mcount.git/arch/x86/kernel/irq_64.c
===================================================================
--- linux-mcount.git.orig/arch/x86/kernel/irq_64.c 2008-01-25 21:46:48.000000000 -0500
+++ linux-mcount.git/arch/x86/kernel/irq_64.c 2008-01-25 21:47:38.000000000 -0500
@@ -149,6 +149,8 @@ asmlinkage unsigned int do_IRQ(struct pt
irq_enter();
irq = __get_cpu_var(vector_irq)[vector];

+ trace_mark(arch_do_irq, "ip %lx irq %d", regs->rip, irq);
+
#ifdef CONFIG_DEBUG_STACKOVERFLOW
stack_overflow_check(regs);
#endif
Index: linux-mcount.git/arch/x86/kernel/traps_32.c
===================================================================
--- linux-mcount.git.orig/arch/x86/kernel/traps_32.c 2008-01-25 21:47:08.000000000 -0500
+++ linux-mcount.git/arch/x86/kernel/traps_32.c 2008-01-25 21:47:38.000000000 -0500
@@ -769,6 +769,8 @@ notrace fastcall __kprobes void do_nmi(s

nmi_enter();

+ trace_mark(arch_do_nmi, "ip %lx flags %lx", regs->eip, regs->eflags);
+
cpu = smp_processor_id();

++nmi_count(cpu);
Index: linux-mcount.git/arch/x86/kernel/traps_64.c
===================================================================
--- linux-mcount.git.orig/arch/x86/kernel/traps_64.c 2008-01-25 21:46:48.000000000 -0500
+++ linux-mcount.git/arch/x86/kernel/traps_64.c 2008-01-25 21:47:38.000000000 -0500
@@ -782,6 +782,8 @@ asmlinkage __kprobes void default_do_nmi

cpu = smp_processor_id();

+ trace_mark(arch_do_nmi, "ip %lx flags %lx", regs->rip, regs->eflags);
+
/* Only the BSP gets external NMIs from the system. */
if (!cpu)
reason = get_nmi_reason();
Index: linux-mcount.git/arch/x86/mm/fault_32.c
===================================================================
--- linux-mcount.git.orig/arch/x86/mm/fault_32.c 2008-01-25 21:46:48.000000000 -0500
+++ linux-mcount.git/arch/x86/mm/fault_32.c 2008-01-25 21:47:38.000000000 -0500
@@ -311,6 +311,9 @@ fastcall void __kprobes do_page_fault(st
/* get the address */
address = read_cr2();

+ trace_mark(arch_do_page_fault, "ip %lx err %lx addr %lx",
+ regs->eip, error_code, address);
+
tsk = current;

si_code = SEGV_MAPERR;
Index: linux-mcount.git/arch/x86/mm/fault_64.c
===================================================================
--- linux-mcount.git.orig/arch/x86/mm/fault_64.c 2008-01-25 21:46:48.000000000 -0500
+++ linux-mcount.git/arch/x86/mm/fault_64.c 2008-01-25 21:47:38.000000000 -0500
@@ -316,6 +316,9 @@ asmlinkage void __kprobes do_page_fault(
/* get the address */
address = read_cr2();

+ trace_mark(arch_do_page_fault, "ip %lx err %lx addr %lx",
+ regs->rip, error_code, address);
+
info.si_code = SEGV_MAPERR;


Index: linux-mcount.git/kernel/hrtimer.c
===================================================================
--- linux-mcount.git.orig/kernel/hrtimer.c 2008-01-25 21:46:48.000000000 -0500
+++ linux-mcount.git/kernel/hrtimer.c 2008-01-25 21:47:38.000000000 -0500
@@ -709,6 +709,8 @@ static void enqueue_hrtimer(struct hrtim
struct hrtimer *entry;
int leftmost = 1;

+ trace_mark(kernel_hrtimer_enqueue,
+ "expires %p timer %p", &timer->expires, timer);
/*
* Find the right place in the rbtree:
*/
@@ -1130,6 +1132,7 @@ void hrtimer_interrupt(struct clock_even

retry:
now = ktime_get();
+ trace_mark(kernel_hrtimer_interrupt, "now %p", &now);

expires_next.tv64 = KTIME_MAX;

@@ -1168,6 +1171,10 @@ void hrtimer_interrupt(struct clock_even
continue;
}

+ trace_mark(kernel_hrtimer_interrupt_expire,
+ "expires %p timer %p",
+ &timer->expires, timer);
+
__run_hrtimer(timer);
}
spin_unlock(&cpu_base->lock);
Index: linux-mcount.git/kernel/sched.c
===================================================================
--- linux-mcount.git.orig/kernel/sched.c 2008-01-25 21:47:36.000000000 -0500
+++ linux-mcount.git/kernel/sched.c 2008-01-25 21:47:38.000000000 -0500
@@ -90,6 +90,11 @@ unsigned long long __attribute__((weak))
#define PRIO_TO_NICE(prio) ((prio) - MAX_RT_PRIO - 20)
#define TASK_NICE(p) PRIO_TO_NICE((p)->static_prio)

+#define __PRIO(prio) \
+ ((prio) <= 99 ? 199 - (prio) : (prio) - 120)
+
+#define PRIO(p) __PRIO((p)->prio)
+
/*
* 'User priority' is the nice value converted to something we
* can work with better when scaling various scheduler parameters,
@@ -1372,6 +1377,9 @@ static void activate_task(struct rq *rq,
if (p->state == TASK_UNINTERRUPTIBLE)
rq->nr_uninterruptible--;

+ trace_mark(kernel_sched_activate_task,
+ "pid %d prio %d nr_running %ld",
+ p->pid, PRIO(p), rq->nr_running);
enqueue_task(rq, p, wakeup);
inc_nr_running(p, rq);
}
@@ -1385,6 +1393,9 @@ static void deactivate_task(struct rq *r
rq->nr_uninterruptible++;

dequeue_task(rq, p, sleep);
+ trace_mark(kernel_sched_deactivate_task,
+ "pid %d prio %d nr_running %ld",
+ p->pid, PRIO(p), rq->nr_running);
dec_nr_running(p, rq);
}

--


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