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authorJan Beulich <jbeulich@novell.com>2008-05-12 15:44:41 +0200
committerThomas Gleixner <tglx@linutronix.de>2008-05-25 07:11:49 +0200
commita2eddfa95919a730e0e5ed17e9c303fe5ba249cd (patch)
tree19c806c27256fed0a744d8628caa356219e6bf16
parent75d3bce2fc0a80f435fe12f2c9ed2632c8ac29e4 (diff)
x86: make /proc/stat account for all interrupts
LAPIC interrupts, which don't go through the generic interrupt handling code, aren't accounted for in /proc/stat. Hence this patch adds a mechanism architectures can use to accordingly adjust the statistics. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--arch/x86/kernel/irq_32.c38
-rw-r--r--arch/x86/kernel/irq_64.c28
-rw-r--r--fs/proc/proc_misc.c9
-rw-r--r--include/asm-x86/hardirq.h6
4 files changed, 81 insertions, 0 deletions
diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c
index 147352df28b9..468acd04aa2e 100644
--- a/arch/x86/kernel/irq_32.c
+++ b/arch/x86/kernel/irq_32.c
@@ -313,16 +313,20 @@ skip:
per_cpu(irq_stat,j).irq_tlb_count);
seq_printf(p, " TLB shootdowns\n");
#endif
+#ifdef CONFIG_X86_MCE
seq_printf(p, "TRM: ");
for_each_online_cpu(j)
seq_printf(p, "%10u ",
per_cpu(irq_stat,j).irq_thermal_count);
seq_printf(p, " Thermal event interrupts\n");
+#endif
+#ifdef CONFIG_X86_LOCAL_APIC
seq_printf(p, "SPU: ");
for_each_online_cpu(j)
seq_printf(p, "%10u ",
per_cpu(irq_stat,j).irq_spurious_count);
seq_printf(p, " Spurious interrupts\n");
+#endif
seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
#if defined(CONFIG_X86_IO_APIC)
seq_printf(p, "MIS: %10u\n", atomic_read(&irq_mis_count));
@@ -331,6 +335,40 @@ skip:
return 0;
}
+/*
+ * /proc/stat helpers
+ */
+u64 arch_irq_stat_cpu(unsigned int cpu)
+{
+ u64 sum = nmi_count(cpu);
+
+#ifdef CONFIG_X86_LOCAL_APIC
+ sum += per_cpu(irq_stat, cpu).apic_timer_irqs;
+#endif
+#ifdef CONFIG_SMP
+ sum += per_cpu(irq_stat, cpu).irq_resched_count;
+ sum += per_cpu(irq_stat, cpu).irq_call_count;
+ sum += per_cpu(irq_stat, cpu).irq_tlb_count;
+#endif
+#ifdef CONFIG_X86_MCE
+ sum += per_cpu(irq_stat, cpu).irq_thermal_count;
+#endif
+#ifdef CONFIG_X86_LOCAL_APIC
+ sum += per_cpu(irq_stat, cpu).irq_spurious_count;
+#endif
+ return sum;
+}
+
+u64 arch_irq_stat(void)
+{
+ u64 sum = atomic_read(&irq_err_count);
+
+#ifdef CONFIG_X86_IO_APIC
+ sum += atomic_read(&irq_mis_count);
+#endif
+ return sum;
+}
+
#ifdef CONFIG_HOTPLUG_CPU
#include <mach_apic.h>
diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c
index 3aac15466a91..1f78b238d8d2 100644
--- a/arch/x86/kernel/irq_64.c
+++ b/arch/x86/kernel/irq_64.c
@@ -135,6 +135,7 @@ skip:
seq_printf(p, "%10u ", cpu_pda(j)->irq_tlb_count);
seq_printf(p, " TLB shootdowns\n");
#endif
+#ifdef CONFIG_X86_MCE
seq_printf(p, "TRM: ");
for_each_online_cpu(j)
seq_printf(p, "%10u ", cpu_pda(j)->irq_thermal_count);
@@ -143,6 +144,7 @@ skip:
for_each_online_cpu(j)
seq_printf(p, "%10u ", cpu_pda(j)->irq_threshold_count);
seq_printf(p, " Threshold APIC interrupts\n");
+#endif
seq_printf(p, "SPU: ");
for_each_online_cpu(j)
seq_printf(p, "%10u ", cpu_pda(j)->irq_spurious_count);
@@ -153,6 +155,32 @@ skip:
}
/*
+ * /proc/stat helpers
+ */
+u64 arch_irq_stat_cpu(unsigned int cpu)
+{
+ u64 sum = cpu_pda(cpu)->__nmi_count;
+
+ sum += cpu_pda(cpu)->apic_timer_irqs;
+#ifdef CONFIG_SMP
+ sum += cpu_pda(cpu)->irq_resched_count;
+ sum += cpu_pda(cpu)->irq_call_count;
+ sum += cpu_pda(cpu)->irq_tlb_count;
+#endif
+#ifdef CONFIG_X86_MCE
+ sum += cpu_pda(cpu)->irq_thermal_count;
+ sum += cpu_pda(cpu)->irq_threshold_count;
+#endif
+ sum += cpu_pda(cpu)->irq_spurious_count;
+ return sum;
+}
+
+u64 arch_irq_stat(void)
+{
+ return atomic_read(&irq_err_count);
+}
+
+/*
* do_IRQ handles all normal device IRQ's (the special
* SMP cross-CPU interrupts have their own specific
* handlers).
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 74a323d2b850..903e617bec58 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -472,6 +472,13 @@ static const struct file_operations proc_vmalloc_operations = {
};
#endif
+#ifndef arch_irq_stat_cpu
+#define arch_irq_stat_cpu(cpu) 0
+#endif
+#ifndef arch_irq_stat
+#define arch_irq_stat() 0
+#endif
+
static int show_stat(struct seq_file *p, void *v)
{
int i;
@@ -509,7 +516,9 @@ static int show_stat(struct seq_file *p, void *v)
sum += temp;
per_irq_sum[j] += temp;
}
+ sum += arch_irq_stat_cpu(i);
}
+ sum += arch_irq_stat();
seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
(unsigned long long)cputime64_to_clock_t(user),
diff --git a/include/asm-x86/hardirq.h b/include/asm-x86/hardirq.h
index 314434d664e7..000787df66e6 100644
--- a/include/asm-x86/hardirq.h
+++ b/include/asm-x86/hardirq.h
@@ -3,3 +3,9 @@
#else
# include "hardirq_64.h"
#endif
+
+extern u64 arch_irq_stat_cpu(unsigned int cpu);
+#define arch_irq_stat_cpu arch_irq_stat_cpu
+
+extern u64 arch_irq_stat(void);
+#define arch_irq_stat arch_irq_stat