linux-kernel - Re: [PATCH] perf, record: Add clockid parameter

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Message-ID: <5519A689.3040908@gmail.com>
Date:	Mon, 30 Mar 2015 13:39:53 -0600
From:	David Ahern <dsahern@...il.com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Stephane Eranian <eranian@...gle.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jiri Olsa <jolsa@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	John Stultz <john.stultz@...aro.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH] perf, record: Add clockid parameter

On 3/30/15 1:32 PM, Peter Zijlstra wrote:

>>> --- a/tools/perf/builtin-record.c
>>> +++ b/tools/perf/builtin-record.c
>>> @@ -732,13 +732,16 @@ static const struct clockid_map clockids
>>>   	/* available for all events, NMI safe */
>>>   	CLOCKID_MAP("monotonic", CLOCK_MONOTONIC),
>>>   	CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW),
>>> -	CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW),
>>>
>>>   	/* available for some events */
>>>   	CLOCKID_MAP("realtime", CLOCK_REALTIME),
>>>   	CLOCKID_MAP("boottime", CLOCK_BOOTTIME),
>>>   	CLOCKID_MAP("tai", CLOCK_TAI),
>>>
>>> +	/* available for the lazy */
>>> +	CLOCKID_MAP("mono", CLOCK_MONOTONIC),
>>> +	CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW),
>>> +
>>
>> how about this one as well:
>> CLOCKID_MAP("real", CLOCK_REALTIME),
>
> CLOCK_REALTIME is of limited usability because its not NMI safe.
>

sure, but you have the long version above. I was also suggesting the 
shortcut version -- 5 fewer letters.
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