From: David Brownell <david-b@pacbell.net>
To: "Woodruff, Richard" <r-woodruff2@ti.com>
Cc: linux-omap@vger.kernel.org
Subject: Re: Idle picture for those interested.
Date: Fri, 4 Apr 2008 13:56:40 -0700 [thread overview]
Message-ID: <200804041356.40567.david-b@pacbell.net> (raw)
In-Reply-To: <3B6D69C3A9EBCA4BA5DA60D91302742903F14855@dlee13.ent.ti.com>
On Friday 04 April 2008, Woodruff, Richard wrote:
> For any interested I'm posting a small snippet of what an ARM-OMAP idle
> looks like. Having a nice tool can go a long ways. I'm not sure if the
> picture will make it, but it's worth a try. Knowing what is out there
> for tools is useful.
Presumably this is from the CPU trace port, OMAP3 with NO_HZ.
Do I read this right: 18 usec tick processing overhead after
receiving an IRQ, before even getting to the generic OMAP GPIO
irq logic (which then has to dispatch to the real IRQ handler)?
Over 5 usec just for updating jiffies64 ...
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next prev parent reply other threads:[~2008-04-04 20:56 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <ae36f8040803061301y6e0823a8pbdf0b6f0b47e5639@mail.gmail.com>
[not found] ` <3B6D69C3A9EBCA4BA5DA60D91302742903AFC880@dlee13.ent.ti.com>
[not found] ` <20080307071454.GC7635@atomide.com>
2008-03-15 0:24 ` [PATCH] [RFC] dmtimer library is very inefficient today Woodruff, Richard
2008-03-18 18:33 ` Kevin Hilman
2008-03-18 18:51 ` Woodruff, Richard
2008-03-19 2:40 ` [PATCH] dmtimer posting Woodruff, Richard
2008-03-19 14:15 ` Tony Lindgren
2008-03-19 14:47 ` Woodruff, Richard
2008-03-19 15:58 ` Tony Lindgren
2008-03-19 22:13 ` Woodruff, Richard
2008-03-20 11:57 ` Tony Lindgren
2008-03-20 12:19 ` Tony Lindgren
2008-03-21 0:13 ` Woodruff, Richard
2008-03-21 0:01 ` Woodruff, Richard
2008-03-31 10:49 ` Tony Lindgren
2008-03-31 12:18 ` Woodruff, Richard
2008-04-02 7:23 ` Tony Lindgren
2008-04-04 4:50 ` Woodruff, Richard
2008-04-04 20:03 ` [PATCH] timer optimization part 2 Woodruff, Richard
2008-04-04 20:23 ` Idle picture for those interested Woodruff, Richard
2008-04-04 20:56 ` David Brownell [this message]
2008-04-04 21:45 ` Woodruff, Richard
2008-04-04 21:56 ` Woodruff, Richard
2008-04-04 22:07 ` David Brownell
[not found] ` <49DA3A9F04A0E5498FF06EFCC343DCF90203DA56FF@dlee13.ent.ti.com>
2008-05-07 23:46 ` [PATCH] timer optimization part 2 Woodruff, Richard
2008-05-08 17:40 ` Tony Lindgren
2008-03-19 19:52 ` [PATCH] [RFC] dmtimer library is very inefficient today Ladislav Michl
2008-03-20 8:58 ` Tony Lindgren
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