854306 - Add option to disable YARR JIT (--disable-yarr-jit)

Status: RESOLVED FIXED

(Core :: JavaScript Engine, defect)

Description

[Makoto Kato [:m_kato]]

SpiderMonkey has no thumb-2 only JIT assembler.  So for this platform such as WinRT, I want to add --disable-yarr-jit.

Also, ENABLE_YARR_JIT should move from Makefile to configure, like METHODJIT/ION.

Comment 1

[Makoto Kato [:m_kato]]

Attachment: fix

Comment 2

[Makoto Kato [:m_kato]]

https://hg.mozilla.org/integration/mozilla-inbound/rev/a300b077ebba

Comment 3

[Olli Pettay [:smaug][[e-mail]]]

Did this cause the huge spike in http://arewefastyet.com/ ?

Comment 4

[Jan de Mooij [:jandem]]

(In reply to Olli Pettay [:smaug] from comment #3)
> Did this cause the huge spike in http://arewefastyet.com/ ?

Yes. Looks like we have to reconfigure AWFY to enable Yarr again, at least that seems to fix the problem for me here..

Comment 5

[Hannes Verschore [:h4writer]]

Indeed, a reconfigure on awfy solved the issue. x86 is back to normal performance. x64 will go back to normal performance in the coming hours.

Comment 6

[Ryan VanderMeulen [:RyanVM]]

https://hg.mozilla.org/mozilla-central/rev/a300b077ebba