From: Philip Langdale <philipl@overt.org>
To: Jeff Garrett <jeff@jgarrett.org>
Cc: Len Brown <lenb@kernel.org>, Andi Kleen <andi@firstfloor.org>,
linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org
Subject: Re: acpi_idle: Very idle Core i7 machine never enters C3
Date: Fri, 30 Apr 2010 07:57:03 -0700 [thread overview]
Message-ID: <20100430075703.15dd05bb@fido5> (raw)
In-Reply-To: <20100427124703.GA16706@jgarrett.org>
On Tue, 27 Apr 2010 07:47:03 -0500
jeff@jgarrett.org (Jeff Garrett) wrote:
> My board identifies it as a Dell. No idea if they rebranded a
> gigabyte.
>
> The patch seems to work for me as well, powertop shows 97.5% c3,
> turbostat shows 93.6% c6 now. I do get weird latency spikes (on I/O)
> from time to time.
>
> When I was investigating, I completely configured USB off, and it
> still wouldn't go into deep sleep. Not sure how well that meshes
> with your UHCI theory.
Does your board expose UHCI controllers or just EHCI with the rate
matching hubs? When you say 'configured USB off'?, do you mean off
in the BIOS or just no drivers?
--phil
next prev parent reply other threads:[~2010-04-30 14:57 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-26 8:47 acpi_idle: Very idle Core i7 machine never enters C3 Jeff Garrett
2010-01-26 12:41 ` peng huang
2010-01-26 14:59 ` Jeff Garrett
2010-01-27 13:27 ` peng huang
2010-02-05 16:22 ` Jeff Garrett
2010-01-26 21:45 ` Andi Kleen
2010-02-05 16:09 ` Jeff Garrett
2010-02-05 17:45 ` Len Brown
2010-02-05 20:53 ` Jeff Garrett
2010-04-27 2:40 ` Philip Langdale
2010-04-27 7:26 ` Len Brown
2010-04-27 15:41 ` Philip Langdale
2010-04-27 12:47 ` Jeff Garrett
2010-04-30 14:57 ` Philip Langdale [this message]
2010-04-30 16:25 ` Len Brown
2010-04-30 17:44 ` Matthew Garrett
2010-04-30 18:35 ` Philip Langdale
2010-05-25 5:43 ` Len Brown
2010-05-25 5:59 ` Yu, Luming
2010-05-25 12:39 ` Matthew Garrett
2010-05-25 12:43 ` Matthew Garrett
2010-05-25 15:33 ` Len Brown
2010-05-25 18:55 ` Matthew Garrett
2010-07-21 21:31 ` [PATCH] ACPI: make acpi_idle Nehalem-aware Len Brown
2010-07-22 0:53 ` Venkatesh Pallipadi
2010-07-22 7:47 ` Andi Kleen
2010-07-22 15:57 ` Len Brown
2010-07-22 21:21 ` [PATCH] ACPI: skip checking BM_STS if the BIOS doesn't ask for it Len Brown
2010-07-22 21:40 ` [PATCH] ACPI: create "processor.bm_check_disable" boot param Len Brown
2010-07-26 7:24 ` Andi Kleen
2010-07-27 0:19 ` Len Brown
2010-07-27 11:28 ` Andi Kleen
2010-07-28 18:58 ` Len Brown
2010-07-22 21:25 ` [PATCH] ACPI: make acpi_idle Nehalem-aware Iain
2010-07-22 21:53 ` Iain
2010-07-22 22:01 ` Len Brown
2010-07-23 12:40 ` Iain
2010-08-03 6:55 ` Pavel Machek
2010-08-03 7:05 ` Andi Kleen
2010-05-25 12:37 ` acpi_idle: Very idle Core i7 machine never enters C3 Matthew Garrett
2010-05-25 15:40 ` Len Brown
2010-07-22 5:34 ` Len Brown
2010-02-01 14:10 ` Pavel Machek
2010-02-05 16:30 ` Jeff Garrett
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