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x86-64: Move irq stats from PDA to per-cpu and consolidate with 32-bit. 

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Brian Gerst 2009-01-19 00:38:57 +09:00 committed by Tejun Heo
parent 74e7904559
commit 1b437c8c73
6 changed files with 27 additions and 44 deletions
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24
arch/x86/include/asm/hardirq_64.h
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@ -3,22 +3,36 @@
#include <linux/threads.h>
#include <linux/irq.h>
#include <asm/pda.h>
#include <asm/apic.h>
typedef struct {
unsigned int __softirq_pending;
unsigned int __nmi_count; /* arch dependent */
unsigned int apic_timer_irqs; /* arch dependent */
unsigned int irq0_irqs;
unsigned int irq_resched_count;
unsigned int irq_call_count;
unsigned int irq_tlb_count;
unsigned int irq_thermal_count;
unsigned int irq_spurious_count;
unsigned int irq_threshold_count;
} ____cacheline_aligned irq_cpustat_t;
DECLARE_PER_CPU(irq_cpustat_t, irq_stat);
/* We can have at most NR_VECTORS irqs routed to a cpu at a time */
#define MAX_HARDIRQS_PER_CPU NR_VECTORS
#define __ARCH_IRQ_STAT 1
#define inc_irq_stat(member) add_pda(member, 1)
#define inc_irq_stat(member) percpu_add(irq_stat.member, 1)
#define local_softirq_pending() read_pda(__softirq_pending)
#define local_softirq_pending() percpu_read(irq_stat.__softirq_pending)
#define __ARCH_SET_SOFTIRQ_PENDING 1
#define set_softirq_pending(x) write_pda(__softirq_pending, (x))
#define or_softirq_pending(x) or_pda(__softirq_pending, (x))
#define set_softirq_pending(x) percpu_write(irq_stat.__softirq_pending, (x))
#define or_softirq_pending(x) percpu_or(irq_stat.__softirq_pending, (x))
extern void ack_bad_irq(unsigned int irq);

10
arch/x86/include/asm/pda.h
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@ -25,19 +25,9 @@ struct x8664_pda {
char *irqstackptr;
short nodenumber; /* number of current node (32k max) */
short in_bootmem; /* pda lives in bootmem */
unsigned int __softirq_pending;
unsigned int __nmi_count; /* number of NMI on this CPUs */
short mmu_state;
short isidle;
struct mm_struct *active_mm;
unsigned apic_timer_irqs;
unsigned irq0_irqs;
unsigned irq_resched_count;
unsigned irq_call_count;
unsigned irq_tlb_count;
unsigned irq_thermal_count;
unsigned irq_threshold_count;
unsigned irq_spurious_count;
} ____cacheline_aligned_in_smp;
DECLARE_PER_CPU(struct x8664_pda, __pda);

6
arch/x86/kernel/irq.c
View File

@ -36,11 +36,7 @@ void ack_bad_irq(unsigned int irq)
#endif
}
#ifdef CONFIG_X86_32
# define irq_stats(x) (&per_cpu(irq_stat, x))
#else
# define irq_stats(x) cpu_pda(x)
#endif
#define irq_stats(x) (&per_cpu(irq_stat, x))
/*
* /proc/interrupts printing:
*/

3
arch/x86/kernel/irq_64.c
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@ -19,6 +19,9 @@
#include <asm/io_apic.h>
#include <asm/idle.h>
DEFINE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
EXPORT_PER_CPU_SYMBOL(irq_stat);
/*
* Probabilistic stack overflow check:
*

10
arch/x86/kernel/nmi.c
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@ -61,11 +61,7 @@ static int endflag __initdata;
static inline unsigned int get_nmi_count(int cpu)
{
#ifdef CONFIG_X86_64
return cpu_pda(cpu)->__nmi_count;
#else
return nmi_count(cpu);
#endif
return per_cpu(irq_stat, cpu).__nmi_count;
}
static inline int mce_in_progress(void)
@ -82,12 +78,8 @@ static inline int mce_in_progress(void)
*/
static inline unsigned int get_timer_irqs(int cpu)
{
#ifdef CONFIG_X86_64
return read_pda(apic_timer_irqs) + read_pda(irq0_irqs);
#else
return per_cpu(irq_stat, cpu).apic_timer_irqs +
per_cpu(irq_stat, cpu).irq0_irqs;
#endif
}
#ifdef CONFIG_SMP

18
arch/x86/xen/smp.c
View File

@ -50,11 +50,7 @@ static irqreturn_t xen_call_function_single_interrupt(int irq, void *dev_id);
*/
static irqreturn_t xen_reschedule_interrupt(int irq, void *dev_id)
{
#ifdef CONFIG_X86_32
__get_cpu_var(irq_stat).irq_resched_count++;
#else
add_pda(irq_resched_count, 1);
#endif
inc_irq_stat(irq_resched_count);
return IRQ_HANDLED;
}
@ -435,11 +431,7 @@ static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id)
{
irq_enter();
generic_smp_call_function_interrupt();
#ifdef CONFIG_X86_32
__get_cpu_var(irq_stat).irq_call_count++;
#else
add_pda(irq_call_count, 1);
#endif
inc_irq_stat(irq_call_count);
irq_exit();
return IRQ_HANDLED;
@ -449,11 +441,7 @@ static irqreturn_t xen_call_function_single_interrupt(int irq, void *dev_id)
{
irq_enter();
generic_smp_call_function_single_interrupt();
#ifdef CONFIG_X86_32
__get_cpu_var(irq_stat).irq_call_count++;
#else
add_pda(irq_call_count, 1);
#endif
inc_irq_stat(irq_call_count);
irq_exit();
return IRQ_HANDLED;