diff options
| author | Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | 2011-03-16 19:05:28 -0400 |
|---|---|---|
| committer | Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | 2011-03-16 19:05:28 -0400 |
| commit | b67a927633d61daaa59e72dc963fa2547efc447d (patch) | |
| tree | 880831fee35ae1e9ff6d7f3ebed04aa5d7f50052 /arch/x86 | |
| parent | 3a02c6ddd4afa3dd49a25da0ab6d93b8a0861ada (diff) | |
lttng-pm-idle-instrumentation
LTTng pm_idle instrumentation, arch-specific
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/process_64.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index bd387e8f73b..034100e5ade 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -37,6 +37,7 @@ #include <linux/uaccess.h> #include <linux/io.h> #include <linux/ftrace.h> +#include <trace/pm.h> #include <asm/pgtable.h> #include <asm/system.h> @@ -51,6 +52,9 @@ #include <asm/syscalls.h> #include <asm/debugreg.h> +DEFINE_TRACE(pm_idle_exit); +DEFINE_TRACE(pm_idle_entry); + asmlinkage extern void ret_from_fork(void); DEFINE_PER_CPU(unsigned long, old_rsp); @@ -73,6 +77,11 @@ EXPORT_SYMBOL_GPL(idle_notifier_unregister); void enter_idle(void) { percpu_write(is_idle, 1); + /* + * Trace last event before calling notifiers. Notifiers flush + * data from buffers before going to idle. + */ + trace_pm_idle_entry(); atomic_notifier_call_chain(&idle_notifier, IDLE_START, NULL); } @@ -81,6 +90,7 @@ static void __exit_idle(void) if (x86_test_and_clear_bit_percpu(0, is_idle) == 0) return; atomic_notifier_call_chain(&idle_notifier, IDLE_END, NULL); + trace_pm_idle_exit(); } /* Called from interrupts to signify idle end */ |