Messages in this thread Patch in this message | | | From | Ravi Bangoria <> | Subject | [PATCH] Powerpc/perf: Wire up PMI throttling | Date | Wed, 14 Nov 2018 19:44:25 +0530 |
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Commit 14c63f17b1fde ("perf: Drop sample rate when sampling is too slow") introduced a way to throttle PMU interrupts if we're spending too much time just processing those. Wire up powerpc PMI handler to use this infrastructure.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> --- arch/powerpc/kernel/traps.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 9a86572db1ef..44f85fa22356 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -18,6 +18,7 @@ #include <linux/errno.h> #include <linux/sched.h> #include <linux/sched/debug.h> +#include <linux/sched/clock.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/pkeys.h> @@ -1803,9 +1804,12 @@ void vsx_unavailable_tm(struct pt_regs *regs) void performance_monitor_exception(struct pt_regs *regs) { + u64 start_clock; __this_cpu_inc(irq_stat.pmu_irqs); + start_clock = sched_clock(); perf_irq(regs); + perf_sample_event_took(sched_clock() - start_clock); } #ifdef CONFIG_PPC_ADV_DEBUG_REGS -- 2.19.1
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