Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "David S. Miller" , Sasha Levin Subject: [PATCH 3.18 07/90] sparc: Throttle perf events properly. Date: Mon, 19 Nov 2018 17:28:49 +0100 Message-Id: <20181119162621.950798107@linuxfoundation.org> In-Reply-To: <20181119162620.585061184@linuxfoundation.org> References: <20181119162620.585061184@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit List-ID: 3.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: "David S. Miller" [ Upstream commit 455adb3174d2c8518cef1a61140c211f6ac224d2 ] Like x86 and arm, call perf_sample_event_took() in perf event NMI interrupt handler. Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- arch/sparc/kernel/perf_event.c | 9 +++++++++ 1 file changed, 9 insertions(+) --- a/arch/sparc/kernel/perf_event.c +++ b/arch/sparc/kernel/perf_event.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include #include @@ -1586,6 +1587,8 @@ static int __kprobes perf_event_nmi_hand 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_hand 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_hand sparc_pmu_stop(event, 0); } + finish_clock = sched_clock(); + + perf_sample_event_took(finish_clock - start_clock); + return NOTIFY_STOP; }