[PATCH][X86][Haswell][SchedModel] Add exceptions for instructions that diverge from the generic model.

[Quentin Colombet]

Hi Nadav,

On Aug 12, 2014, at 9:29 AM, Nadav Rotem <nrotem at apple.com> wrote:

> Hi Quentin, 
> 
> Sorry for the delay in response. Thanks for taking the time to work on improving the scheduling model for x86. 

Thanks for taking a look!

> 
>> On Aug 8, 2014, at 5:10 PM, Quentin Colombet <qcolombet at apple.com> wrote:
>> 
>> Hi,
>> 
>> This series of patches adds an exception for each instruction that diverges from the generic scheduling model.
>> It follows the structure of Agner Fog’s instructions tables and provides a patch for each sub-group.
> 
> Did you use Agner’s tables or the tables from the intel optimization guide? 

I used Agner’s tables. As far as I can tell the intel optimization guide is not precise enough for this level of details. Moreover, Agner’s data are based on actual measurements :).

Cheers,
-Quentin
> 
>> 
>> Although I had observed changes of the schedule of some test cases in the llvm-testsuite + SPECs, I had not measured anything than noise.
>> Note: I have measured both ‘-O3 -march=native' and ‘-Os -march=native’ on a Haswell machine.
> 
> :( 
> 
>> 
>> Thanks for your reviews.
>> 
>> -Quentin
>> <0001-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0002-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0003-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0004-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0005-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0006-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0007-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0008-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0009-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0010-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0011-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0012-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0013-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0014-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0015-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0016-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0017-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0018-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0019-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0020-X86-Haswell-SchedModel-Add-architecture-specific-sch.patch><0021-X86-Haswell-SchedModel-Tidy-up.patch>
>