x86, perfcounters: print out the ->used bitmask

Impact: extend debug printouts

Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index 74090a393a7ce637fb3c73b1b9971db034ae3de9..f3359c2b3910787640faf74fa022822da78d8446 100644 (file)
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/arch/x86/kernel/cpu/perf_counter.c
@@ -255,6 +255,7 @@ static int pmc_generic_enable(struct perf_counter *counter)
                idx = find_first_zero_bit(cpuc->used, nr_counters_generic);
                if (idx == nr_counters_generic)
                        return -EAGAIN;
+
                set_bit(idx, cpuc->used);
                hwc->idx = idx;
        }
@@ -274,6 +275,7 @@ static int pmc_generic_enable(struct perf_counter *counter)
 void perf_counter_print_debug(void)
 {
        u64 ctrl, status, overflow, pmc_ctrl, pmc_count, prev_left;
+       struct cpu_hw_counters *cpuc;
        int cpu, idx;
 
        if (!nr_counters_generic)
@@ -282,6 +284,7 @@ void perf_counter_print_debug(void)
        local_irq_disable();
 
        cpu = smp_processor_id();
+       cpuc = &per_cpu(cpu_hw_counters, cpu);
 
        rdmsrl(MSR_CORE_PERF_GLOBAL_CTRL, ctrl);
        rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, status);
@@ -291,6 +294,7 @@ void perf_counter_print_debug(void)
        printk(KERN_INFO "CPU#%d: ctrl:       %016llx\n", cpu, ctrl);
        printk(KERN_INFO "CPU#%d: status:     %016llx\n", cpu, status);
        printk(KERN_INFO "CPU#%d: overflow:   %016llx\n", cpu, overflow);
+       printk(KERN_INFO "CPU#%d: used:       %016llx\n", cpu, *(u64 *)cpuc->used);
 
        for (idx = 0; idx < nr_counters_generic; idx++) {
                rdmsrl(MSR_ARCH_PERFMON_EVENTSEL0 + idx, pmc_ctrl);