diff options
| author | David S. Miller <davem@davemloft.net> | 2018-10-12 10:33:20 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-22 07:32:41 +0100 |
| commit | 6157f70965d6f135c486706728515a78e954105d (patch) | |
| tree | f67c67b006a3ff4539aadc8bff05d156a3a52c3b /arch | |
| parent | ab9c44bc82f9fba1c1b8ee6ab480b1c7c6c09246 (diff) | |
sparc: Throttle perf events properly.
[ Upstream commit 455adb3174d2c8518cef1a61140c211f6ac224d2 ]
Like x86 and arm, call perf_sample_event_took() in perf event
NMI interrupt handler.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sparc/kernel/perf_event.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c index 8536532970bb..73ad975cae97 100644 --- a/arch/sparc/kernel/perf_event.c +++ b/arch/sparc/kernel/perf_event.c @@ -23,6 +23,7 @@ #include <asm/cpudata.h> #include <asm/uaccess.h> #include <linux/atomic.h> +#include <linux/sched_clock.h> #include <asm/nmi.h> #include <asm/pcr.h> #include <asm/cacheflush.h> @@ -1586,6 +1587,8 @@ 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)) @@ -1599,6 +1602,8 @@ 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); @@ -1637,6 +1642,10 @@ 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; } |