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),
--
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