linux-kernel - Re: [PATCH v5] power: new trace event to print device suspend and resume time

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Message-id: <B8EFE96D1287C24090BAD9D858E15E61743340@sisaex01sj>
Date:	Fri, 19 Jul 2013 18:29:53 +0000
From:	Shuah Khan <shuah.kh@...sung.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	"len.brown@...el.com" <len.brown@...el.com>,
	"pavel@....cz" <pavel@....cz>, "rjw@...k.pl" <rjw@...k.pl>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"fweisbec@...il.com" <fweisbec@...il.com>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"paul.gortmaker@...driver.com" <paul.gortmaker@...driver.com>,
	"joe@...ches.com" <joe@...ches.com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"shuahkhan@...il.com" <shuahkhan@...il.com>,
	Shuah Khan <shuah.kh@...sung.com>
Subject: Re: [PATCH v5] power: new trace event to print device suspend and
 resume time

On 07/18/2013 04:53 PM, Steven Rostedt wrote:
> On Thu, 2013-07-18 at 16:42 -0600, Shuah Khan wrote:
>
>> +TRACE_EVENT(device_pm_report_time,
>> +
>> +	TP_PROTO(struct device *dev, const char *pm_ops, s64 ops_time,
>> +		 char *pm_event_str, int error),
>> +
>> +	TP_ARGS(dev, pm_ops, ops_time, pm_event_str, error),
>> +
>> +	TP_STRUCT__entry(
>> +		__string(device, dev_name(dev))
>> +		__string(driver, dev_driver_string(dev))
>> +		__string(parent, dev->parent ? dev_name(dev->parent) : "none")
>> +		__string(pm_ops, pm_ops ? pm_ops : "none ")
>> +		__string(pm_event_str, pm_event_str)
>> +		__field(s64, ops_time)
>> +		__field(int, error)
>> +	),
>> +
>> +	TP_fast_assign(
>> +		__assign_str(device, dev_name(dev));
>> +		__assign_str(driver, dev_driver_string(dev));
>> +		__assign_str(parent,
>> +				dev->parent ? dev_name(dev->parent) : "none");
>
> Have you tried using the temp variables? These macros expand to be
> called multiple times.
>
> -- Steve

Steve,

Tried with temp variables. Patch is on its way with temp variables. I 
generated .s with and without temp variables and didn't see any 
difference. Should I be seeing a difference, if so what am I missing?

In any case, you have the patch v6 with temp variables.

-- Shuah

Shuah Khan, Linux Kernel Developer - Open Source Group Samsung Research 
America (Silicon Valley) shuah.kh@...sung.com | (970) 672-0658
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