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| author | Ingo Molnar <mingo@elte.hu> | 2008-12-03 10:39:53 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-08 15:47:15 +0100 |
| commit | 241771ef016b5c0c83cd7a4372a74321c973c1e6 (patch) | |
| tree | 5893d72f1721af34daee82f27449bd35c9f65363 /arch/x86/kernel/irq.c | |
| parent | performance counters: documentation (diff) | |
| download | linux-241771ef016b5c0c83cd7a4372a74321c973c1e6.tar.xz linux-241771ef016b5c0c83cd7a4372a74321c973c1e6.zip | |
performance counters: x86 support
Implement performance counters for x86 Intel CPUs.
It's simplified right now: the PERFMON CPU feature is assumed,
which is available in Core2 and later Intel CPUs.
The design is flexible to be extended to more CPU types as well.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/irq.c')
| -rw-r--r-- | arch/x86/kernel/irq.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c index d1d4dc52f649..d92bc71e41a7 100644 --- a/arch/x86/kernel/irq.c +++ b/arch/x86/kernel/irq.c @@ -56,6 +56,10 @@ static int show_other_interrupts(struct seq_file *p) for_each_online_cpu(j) seq_printf(p, "%10u ", irq_stats(j)->apic_timer_irqs); seq_printf(p, " Local timer interrupts\n"); + seq_printf(p, "CNT: "); + for_each_online_cpu(j) + seq_printf(p, "%10u ", irq_stats(j)->apic_perf_irqs); + seq_printf(p, " Performance counter interrupts\n"); #endif #ifdef CONFIG_SMP seq_printf(p, "RES: "); @@ -160,6 +164,7 @@ u64 arch_irq_stat_cpu(unsigned int cpu) #ifdef CONFIG_X86_LOCAL_APIC sum += irq_stats(cpu)->apic_timer_irqs; + sum += irq_stats(cpu)->apic_perf_irqs; #endif #ifdef CONFIG_SMP sum += irq_stats(cpu)->irq_resched_count; |