[webkit-dev] Build slave for JSCOnly Linux MIPS [WARNING - NOT VIRUS SCANNED]

[Filip Pizło]

I think that this is probably OK for the purposes of not creating obligations but I don't see it as a viable strategy for making WebKit work of MIPS. 

For example, you guys haven't even shown that JSC can pass all WebKit tests on MIPS. You haven't shown that the MIPS JIT produces a speed up over cloop on MIPS. My fear is that MIPS lags in correctness and that this will always be the case so long as the porting strategy is to track trunk. If that's the case then the MIPS changes will just cause noise for us and will not accomplish the goal of having a stable version of WebKit that works great on MIPS. 

Can you offer some insight into the current testing and perf status of MIPS?

-Filip

> On Apr 19, 2016, at 5:53 AM, Konstantin Tokarev <annulen at yandex.ru> wrote:
> 
> 
> 
> 19.04.2016, 15:24, "Osztrogonác Csaba" <oszi at inf.u-szeged.hu>:
>> Hi,
>> 
>> now the #error macro in Compiler.h is the only one blocker to
>> be able to build JSCOnly port with GCC 4.8 (without FTL JIT):
>> http://trac.webkit.org/browser/trunk/Source/WTF/wtf/Compiler.h#L73
>> 
>> The existance of a buildbot doesn't mean any obligation for anybody.
>> We have many bots which are allowed to break. Everybody is allowed
>> to break the Apple Mac cmake build, WebKit2 owners can break EFL/GTK
>> builds, JSC developers can break ARM Linux builds.
> 
> 
> I also would like to note that existence of MIPS bot does not oblige JSC developers who don't work on MIPS to keep it green, e.g. by implementing missing MacroAssembler functions. However, having such bot might be useful in case of refactorings which involve moving MIPS code around, which already happened in the past.
> 
>> 
>> br,
>> Ossy
>> 
>> Filip Pizlo írta:
>>>  I don't want a buildbot for MIPS. It's not a relevant architecture anymore. I don't think that JSC developers should have to expend effort towards keeping this architecture working.
>>> 
>>>  -Filip
>>> 
>>>>  On Apr 18, 2016, at 12:36 PM, Konstantin Tokarev <annulen at yandex.ru> wrote:
>>>> 
>>>>  Hello,
>>>> 
>>>>  I'd like to run build slave for MIPS port of JSC (with JSCOnly port on Linux). On the first iteration it will just ensure that compilation is not broken, afterwards I'm planning to add running tests on target.
>>>> 
>>>>  However, I'm planning to use cross-toolchain based on GCC 4.8.4 (for now, the latest one supplied by Broadcom), and unmodified tree won't build because of GCC version check in Source/WTF/wtf/Compiler.h.
>>>> 
>>>>  Are there any objections for lowering GCC requirement from 4.9.0 to 4.8.4 (only for JavaScriptCore without B3)? I'm going to fix arising compilation errors myself.
>>>> 
>>>>  --
>>>>  Regards,
>>>>  Konstantin
>> 
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> 
> -- 
> Regards,
> Konstantin
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