From: David Ahern <dsahern@gmail.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Dennis Gnad <dennis.gnad@kit.edu>, linux-perf-users@vger.kernel.org
Subject: Re: Understanding timestamps in perf.data
Date: Wed, 2 Sep 2015 13:25:51 -0600 [thread overview]
Message-ID: <55E74D3F.4040705@gmail.com> (raw)
In-Reply-To: <87oahk4ock.fsf@tassilo.jf.intel.com>
On 9/2/15 1:23 PM, Andi Kleen wrote:
> David Ahern <dsahern@gmail.com> writes:
>>
>> The counter values are not relevant for profiling. They are programmed
>> to rollover and generate an NMI which causes the sample to be taken.
>
> Actually it's relevent if you use adaptive frequency mode
> (-F or default, not using -c) because it varies then.
In all cases the counters are set to rollover for profiling mode.
next prev parent reply other threads:[~2015-09-02 19:25 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-02 9:28 Understanding timestamps in perf.data Dennis Gnad
2015-09-02 13:43 ` David Ahern
2015-09-02 15:18 ` Dennis Gnad
2015-09-02 16:44 ` David Ahern
2015-09-02 17:00 ` Vince Weaver
2015-09-02 17:00 ` David Ahern
2015-09-03 7:19 ` Dennis Gnad
2015-09-03 12:52 ` Vince Weaver
2015-09-03 14:46 ` Dennis Gnad
2015-09-03 15:17 ` Vince Weaver
2015-09-02 19:23 ` Andi Kleen
2015-09-02 19:25 ` David Ahern [this message]
2015-09-03 9:50 ` Dennis Gnad
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