From: "Li, Aubrey" <aubrey.li@linux.intel.com>
To: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Len Brown <lenb@kernel.org>,
Kumar P Mahesh <mahesh.kumar.p@intel.com>,
Alan Cox <alan@linux.intel.com>,
linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] intel_idle: add idle values for Cherrytrail/Braswell
Date: Wed, 27 Aug 2014 08:03:40 +0800 [thread overview]
Message-ID: <53FD205C.8070302@linux.intel.com> (raw)
In-Reply-To: <20140826090032.GN1660@lahna.fi.intel.com>
On 2014/8/26 17:00, Mika Westerberg wrote:
> On Tue, Aug 26, 2014 at 10:38:32AM +0800, Li, Aubrey wrote:
>> On 2014/8/25 18:12, Mika Westerberg wrote:
>>> On Fri, Aug 22, 2014 at 10:06:21PM +0800, Li, Aubrey wrote:
>>>> On 2014/8/22 19:39, Mika Westerberg wrote:
>>>>> From: Mahesh Kumar P <mahesh.kumar.p@intel.com>
>>>>>
>>>>> Cherrytrail/Braswell is a successor of Intel Baytrail but has slighly
>>>>> different CPU idle values and latencies.
>>>>>
>>>>> Signed-off-by: Kumar P Mahesh <mahesh.kumar.p@intel.com>
>>>>> Signed-off-by: Alan Cox <alan@linux.intel.com>
>>>>> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
>>>>> ---
>>>>> I learned from Mahesh that C1e, C4 and S0i2 states are deprecated so those
>>>>> are now removed.
>>>>
>>>> If the platform has ACPI supported, I believe Len wants to see what
>>>> C-states number exported by ACPI.
>>>>
>>>> Please boot the machine with "intel_idle.max_cstate=0" to disable
>>>> intel_idle, then post the output of the following commands
>>>
>>> OK, here goes:
>>
>> ACPI exposes 0x58 as C6 mwait hint while the patch proposes 0x52 for C6.
>> Can you please remove "intel_idle.max_cstate=0" and run "dmesg | grep
>> idle" again to see how many C6 supports in CPUID enumeration?
>
> [ 16.685769] intel_idle: MWAIT substates: 0x33000020
> [ 16.691236] intel_idle: v0.4 model 0x4C
> [ 16.695539] intel_idle: lapic_timer_reliable_states 0xffffffff
>
enough to turn over to Len to finalize, thanks Mika.
-Aubrey
prev parent reply other threads:[~2014-08-27 0:04 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-22 9:58 [PATCH] intel_idle: add idle values for Cherrytrail/Braswell Mika Westerberg
2014-08-22 11:39 ` [PATCH v2] " Mika Westerberg
2014-08-22 14:06 ` Li, Aubrey
2014-08-25 10:12 ` Mika Westerberg
2014-08-26 2:38 ` Li, Aubrey
2014-08-26 9:00 ` Mika Westerberg
2014-08-27 0:03 ` Li, Aubrey [this message]
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