sparc: Throttle perf events properly. (455adb31) · Commits · 戴 / test

arch/sparc/kernel/perf_event.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -24,6 +24,7 @@
		#include <asm/cpudata.h>
		#include <linux/uaccess.h>
		#include <linux/atomic.h>
		#include <linux/sched/clock.h>
		#include <asm/nmi.h>
		#include <asm/pcr.h>
		#include <asm/cacheflush.h>
		@@ -1612,6 +1613,8 @@ static int __kprobes perf_event_nmi_handler(struct notifier_block *self,
		struct perf_sample_data data;
		struct cpu_hw_events *cpuc;
		struct pt_regs *regs;
		u64 finish_clock;
		u64 start_clock;
		int i;

		if (!atomic_read(&active_events))
		@@ -1625,6 +1628,8 @@ static int __kprobes perf_event_nmi_handler(struct notifier_block *self,
		return NOTIFY_DONE;
		}

		start_clock = sched_clock();

		regs = args->regs;

		cpuc = this_cpu_ptr(&cpu_hw_events);
		@@ -1663,6 +1668,10 @@ static int __kprobes perf_event_nmi_handler(struct notifier_block *self,
		sparc_pmu_stop(event, 0);
		}

		finish_clock = sched_clock();

		perf_sample_event_took(finish_clock - start_clock);

		return NOTIFY_STOP;
		}