Commit 0dff86aa authored by Ingo Molnar's avatar Ingo Molnar
Browse files

x86, perfcounters: print out the ->used bitmask 



Impact: extend debug printouts

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 95cdd2e7

arch/x86/kernel/cpu/perf_counter.c

+4 −0
Original line number Diff line number Diff line
@@ -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);