On 4 January 2011 08:45, Levente Uzonyi <leves at elte.hu> wrote:
> On Mon, 3 Jan 2011, Eliot Miranda wrote:
>
>> On Sun, Jan 2, 2011 at 11:38 PM, Levente Uzonyi <leves at elte.hu> wrote:
>>
>>> Quoting Chris Muller <asqueaker at gmail.com>:
>>>
>>>  Levente wrote:
>>>>
>>>>  I think we should wait for the new VMs, before releasing the new
>>>> images.
>>>>>
>>>>
>>>> Hi Levente,
>>>>
>>>> I did agree, but now that Eliot is on a tear with a new code
>>>> generator, the first official release might still be some weeks away.
>>>> Someone please correct me if that is a misstatement.
>>>>
>>>> It seems unlikely 4.2 will be incompatible with whatever ends up being
>>>> the first official Cog release.  We should consider pushing it out the
>>>> door so we can re-open the trunk to new featurey.
>>>>
>>>
>>> That's right, Cog's recent improvements introduced some instability. So I
>>> think we should release Squeak 4.2 with SqueakVM only and postpone the
>>> multi-VM release. We can also make the release cycle of Squeak 4.3
>>> shorter
>>> to catch up with the two release per year policy and deliver the VM
>>> improvements earlier. I'm also sure that a lot of improvements will be
>>> done
>>> till April/May on both image and VM side.
>>>
>>
>> It would be my preference to release with the Cog VM using the naive
>> SimpleStackBasedCogit code generator.  After all that's worth at least 3x
>> over the standard VM whereas the unstable StackToregisterMappingCogit is
>> only ~ 8% faster than SimpleStackBasedCogit.  It's quite easy for me to
>> generate either; the two coexist in the same VMMaker.
>
> Okay, then I guess we should make sure that the two VMs (SqueakVM and
> CogVM with SimpleStackBasedCogit) behave the same way in most cases. Here's
> an incomplete list of VM differences:
> - CogVM does compile the FloatMathPlugin properly (no crash), but SqueakVM
> doesn't or it does without optimizing the code. Wwe can apply some
> optimization for most methods, see the makefiles of Cog.
> - CogVM doesn't support the new finalization scheme

this is easy to fix, if Eliot would merge my changes to VMMaker,
like VMMaker-oscog-Igor.Stasenko.43 and build new VM's using merged version.

> - there's no SoundPlugin in CogVM on windows
> - the SocketPlugin of CogVM seems to be missing the new primitives
> - AllocationTest >> #testOneGigAllocation is still failing with CogVM
> - I'm not sure if SqueakVM has all of the mirror primitives
>
>
> Levente
>
> P.S.: does the ~8% speedup come from the recompilation benchmark? Is the
> code for the Computer Language Benchmarks Game available somewhere? It
> would be good to test the new stdio support with it.
>



-- 
Best regards,
Igor Stasenko AKA sig.