Messages in this thread | | | Subject | Re: [PATCH] power: new trace event to print device suspend and resume time | From | Joe Perches <> | Date | Tue, 16 Jul 2013 14:39:01 -0700 |
| |
On Tue, 2013-07-16 at 15:23 -0600, Shuah Khan wrote: > A new trace event is added to pm events to print time it takes to suspend and > resume a device. It generates trace message that includes device, driver, > parent information in addition to the type of pm ops invoked as well as the > pm event and error status from the pm ops. Example trace below:
> diff --git a/include/trace/events/power.h b/include/trace/events/power.h [] > @@ -66,6 +66,41 @@ TRACE_EVENT(machine_suspend, > TP_printk("state=%lu", (unsigned long)__entry->state) > ); > > +TRACE_EVENT(device_pm_report_time, > + > + TP_PROTO(const char *device, const char *driver, const char *parent, > + const char *pm_ops, ktime_t ops_time, char *pm_event_str, > + int error), > + > + TP_ARGS(device, driver, parent, pm_ops, ops_time, pm_event_str, error), > + > + TP_STRUCT__entry( > + __string(device, device) > + __string(driver, driver) > + __string(parent, parent) > + __string(pm_ops, pm_ops) > + __string(pm_event_str, pm_event_str) > + __field(unsigned long long, ops_time)
s64
> + __field(int, error) > + ), > + > + TP_fast_assign( > + __assign_str(device, device); > + __assign_str(driver, driver); > + __assign_str(parent, parent); > + __assign_str(pm_ops, pm_ops); > + __assign_str(pm_event_str, pm_event_str); > + __entry->ops_time = (unsigned long long) > + ktime_to_ns(ops_time) >> 10;
so no need for cast.
> + __entry->error = error; > + ), > + > + TP_printk("%s driver(%s) parent(%s) %s %s (%llu usecs) err(%d)\n",
%lld and no newline
> + __get_str(device), __get_str(driver), __get_str(parent), > + __get_str(pm_event_str), __get_str(pm_ops), > + __entry->ops_time, __entry->error) > +); > + > DECLARE_EVENT_CLASS(wakeup_source, > > TP_PROTO(const char *name, unsigned int state),
| |