From: Rob Landley <rob@landley.net>
To: Martin Schwidefsky <schwidefsky@de.ibm.com>,
Oleg Nesterov <oleg@redhat.com>
Cc: linux-kernel@vger.kernel.org, Frederic Weisbecker <fweisbec@gmail.com>
Subject: Re: Question about /proc/uptime
Date: Tue, 31 Dec 2013 22:17:39 -0600 [thread overview]
Message-ID: <52C396E3.5080000@landley.net> (raw)
In-Reply-To: <20131230162617.1b013251@mschwide>
On 12/30/13 09:26, Martin Schwidefsky wrote:
> On Mon, 30 Dec 2013 16:11:10 +0100
> Oleg Nesterov <oleg@redhat.com> wrote:
>> Not sure I understand... except that timekeeping_resume() does
>> __timekeeping_inject_sleeptime().
>
> Hmm, you are right. The sleeptime is added to the monotonic boottime.
> So the first value of /proc/uptime is the wall-time since boot.
> And the second value is combined idle time over all cpus.
Is there an obvious way to query the non-suspend uptime from userspace?
Rob
next prev parent reply other threads:[~2014-01-01 4:17 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-26 2:30 Question about /proc/uptime Rob Landley
2013-12-27 14:45 ` Oleg Nesterov
2013-12-30 8:56 ` Martin Schwidefsky
2013-12-30 15:11 ` Oleg Nesterov
2013-12-30 15:26 ` Martin Schwidefsky
2014-01-01 4:17 ` Rob Landley [this message]
2014-01-01 12:41 ` Martin Schwidefsky
2014-01-01 21:21 ` Rob Landley
2014-01-02 8:28 ` Martin Schwidefsky
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