[PATCH 7/8] Model cache auto-prefetcher in scheduler

[Jiong Wang]

On 20/01/15 13:26, Maxim Kuvyrkov wrote:
> On Jan 20, 2015, at 1:24 PM, Richard Earnshaw <rearnsha@arm.com> wrote:
> ...
>>>> In general, how should someone tuning the compiler for this parameter
>>>> select a value that isn't one of (-1, m_i_q_d+1)?
>>>  From my experiments it seems there are 4 reasonable values for the parameter: (-1) autopref turned off, (0) turned on in rank_for_schedule, (m_i_q_d+1) turned on everywhere.  If there is a static constructor generated for tune tables and it is a problem to have it -- I can shrink acceptable values to these 3 and call it a day.
>>>
>> You only mention 3 values: what was the fourth?
> Typo.  No fourth.
>
>> It might be better then
>> to define a set of values that represent each of these cases and only
>> allow the tuning parameters to select one of those.  The init code then
>> uses that set to select how to set up the various parameters to meet
>> those goals.
>>
>> So something like
>>
>> ARM_SCHED_AUTOPREF_OFF
>> ARM_SCHED_AUTOPREF_RANK
>> ARM_SCHED_AUTOPREF_FULL
> A patch is attached.  I bootstrapped it on arm-linux-gnueabihf.  OK to apply?
bootstrap failure on chromebook, reproduced on two chromebook.

see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65020 please.


>
> --
> Maxim Kuvyrkov
> www.linaro.org
>