diff options
| author | Andi Kleen <[email protected]> | 2015-02-27 09:48:31 -0800 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2015-04-02 17:33:17 +0200 |
| commit | da3e606d885a17525eb18afd423f5c438860b833 (patch) | |
| tree | 78317450af9acec4aec40fff61107c0232a421fa | |
| parent | 8882edf735738c949aba4b65d3ec3453066bab12 (diff) | |
perf/x86: Dump DEBUGCTL in PMU dump
LBRs and LBR freezing are controlled through the DEBUGCTL MSR. So
dump the state of DEBUGCTL too when dumping the PMU state.
Signed-off-by: Andi Kleen <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index b8b7a1277d8d..994737263daa 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -1171,7 +1171,7 @@ static void x86_pmu_start(struct perf_event *event, int flags) void perf_event_print_debug(void) { u64 ctrl, status, overflow, pmc_ctrl, pmc_count, prev_left, fixed; - u64 pebs; + u64 pebs, debugctl; struct cpu_hw_events *cpuc; unsigned long flags; int cpu, idx; @@ -1197,6 +1197,10 @@ void perf_event_print_debug(void) pr_info("CPU#%d: overflow: %016llx\n", cpu, overflow); pr_info("CPU#%d: fixed: %016llx\n", cpu, fixed); pr_info("CPU#%d: pebs: %016llx\n", cpu, pebs); + if (x86_pmu.lbr_nr) { + rdmsrl(MSR_IA32_DEBUGCTLMSR, debugctl); + pr_info("CPU#%d: debugctl: %016llx\n", cpu, debugctl); + } } pr_info("CPU#%d: active: %016llx\n", cpu, *(u64 *)cpuc->active_mask); |