diff options
| author | David S. Miller <davem@davemloft.net> | 2018-10-12 10:33:20 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-13 11:14:50 -0800 |
| commit | c37b554f7d71fb92fa58a4c0a8476b54a24ca4e2 (patch) | |
| tree | 771173705fb0e1928826d9d3d9fbe7cb58776972 /arch/sparc | |
| parent | 9d388b0a09f5e9861a50ab71cafbdac45a2a5d25 (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/sparc')
| -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 8a569b09d2c2..eceb0215bdee 100644 --- a/arch/sparc/kernel/perf_event.c +++ b/arch/sparc/kernel/perf_event.c @@ -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; } |