Message-ID: <4D0670BF.6050403@cisco.com>
Date: Mon, 13 Dec 2010 12:15:11 -0700
From: "David S. Ahern" <daahern@cisco.com>
User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.12) Gecko/20101027 Fedora/3.1.6-1.fc13 Lightning/1.0b3pre Thunderbird/3.1.6
MIME-Version: 1.0
To: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
CC: Peter Zijlstra <peterz@infradead.org>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] perf tools: Add reference timestamp to perf header
References: <20101213170923.GB1691@nowhere> <1292260289.6803.297.camel@twins> <20101213171537.GC1691@nowhere> <1292260699.6803.305.camel@twins> <20101213172216.GB7417@ghostprotocols.net> <1292261716.6803.332.camel@twins> <1292262433.6803.351.camel@twins> <4D065CB2.7050104@cisco.com> <1292263024.6803.370.camel@twins> <4D065F69.7080707@cisco.com> <20101213190831.GA7984@ghostprotocols.net>
In-Reply-To: <20101213190831.GA7984@ghostprotocols.net>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 844
Lines: 28


> We have:
> 
> [acme@mica linux]$ perf list | grep -- -clock
>   cpu-clock                                  [Software event]
>   task-clock                                 [Software event]
> [acme@mica linux]$ 
> 
> So we would have a new one:
> 
>   monotonic-clock

Name seems off. The 'event' is to grab time-of-day and have the 'time'
attribute set which gives the correlation between wall-clock and perf
timestamps.

David

> 
> Peter, agreed? I'll try to implement it now, good opportunity to learn a
> bit more about soft pmus, I'd have to do that anyway for NIC stats, etc.
> 
> - Arnaldo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/