From: Michal Simek <michal.simek@petalogix.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: wuzhangjin@gmail.com, Steven Rostedt <rostedt@goodmis.org>,
Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: sched_clock - microblaze
Date: Fri, 16 Apr 2010 11:11:45 +0200 [thread overview]
Message-ID: <4BC829D1.5070001@petalogix.com> (raw)
In-Reply-To: <201004161037.26070.arnd@arndb.de>
Arnd Bergmann wrote:
> On Friday 16 April 2010, Michal Simek wrote:
>> Why is sched_clock called in init_idle? Do you get any non zero value on
>> any ARCH?
>
> Yes, some architectures return a real-time value here that starts before boot.
> Also, when the clock starts at boot time, there can be a significant time
> spent in the firmware and early kernel code before we get to init_idle.
ok. I will return 0 before timer initialization.
Thanks for explanation,
Michal
>
> Arnd
--
Michal Simek, Ing. (M.Eng)
PetaLogix - Linux Solutions for a Reconfigurable World
w: www.petalogix.com p: +61-7-30090663,+42-0-721842854 f: +61-7-30090663
next prev parent reply other threads:[~2010-04-16 9:11 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-15 14:55 sched_clock - microblaze Michal Simek
2010-04-15 15:04 ` Steven Rostedt
2010-04-15 16:32 ` Michal Simek
2010-04-15 18:12 ` Wu Zhangjin
2010-04-15 19:29 ` Michal Simek
2010-04-15 19:52 ` Arnd Bergmann
2010-04-16 6:23 ` Michal Simek
2010-04-16 8:37 ` Arnd Bergmann
2010-04-16 9:11 ` Michal Simek [this message]
2010-04-15 15:06 ` Steven J. Magnani
2010-04-15 16:21 ` Michal Simek
2010-04-15 18:26 ` Thomas Gleixner
2010-04-15 17:18 ` Wu Zhangjin
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