Hi Eliot, Thanks for the new version! And here's the first bug report, reproducible :)
http://dl.dropbox.com/u/17707726/image.tar.xz Using this image (pharo 1.1.1 from Lukas' hudson with omnibrowser & friends & seaside loaded, pharov10.sources) - opening the settings from the world menu crashes the VM. The output is named 'out1' in the same archive. Regards, Stanislav Paskalev On Fri, Dec 31, 2010 at 4:02 AM, Eliot Miranda <[email protected]> wrote: > > Hi All, > I've released a new version of Cog that has a substantially improved > code generator along the lines of Peter Deutsch's HPS (VisualWorks) and > various of Ian Piumarta's VMs. These all use a simple tecnique to identify > constant references in bytecode and to support a register-based calling > convention. While this does produce faster code it tends to accelerate > low-level code much more than high-level code as you can see by the following > benchmarks: > SimpleStackBasedCogit: [1 to: 100000000 do: [:i|]] timeToRun 691 > StackToRegisterMappingCogit: [1 to: 100000000 do: [:i|]] timeToRun 192 > 192 - 691 / 6.91 -72% > SimpleStackBasedCogit: 0 tinyBenchmarks '753495217 bytecodes/sec; 64769127 > sends/sec' > StackToRegisterMappingCogit: 0 tinyBenchmarks '931756141 bytecodes/sec; > 128157989 sends/sec' > 931756141 - 753495217 / 7534952.17 -24% > 128157989 - 64769127 / 647691.27 -98% > SimpleStackBasedCogit: [Compiler recompileAll] timeToRun 47013 (no transcript > StackToRegisterMappingCogit: [Compiler recompileAll] timeToRun 43406 (no > transcript) > 43406 - 47013 / 470.13 -7.67234594686576 > The status of this code is essentially beta. The test suite runs the same on > the new code generator as on the old, but I think there are still bugs > because I get the occasional transient error. I am therefore very interested > in any reproducible errors you can find. > The VMs (http://www.mirandabanda.org/files/Cog/VM/VM.r2334/) contain a few > other important changes: > - a bug fix to bytecode<->native pc mappng that produced incorrect results > for methods containing blocks with ^-returns in them. One symptom is > incorrect highlighting of the pc in the debugger, althoguh symptoms could be > much serious. > - jitting interpreted methods on backward branches. Currently any > interpreted method that performs more than 20 backward branches will be > considered for JIT compilation and if it is suitable (default, <= 60 > literals) will be compiled to native code. > - new callback support. I need to commit some changes to the Alien package > to provide access to this but essentially the VM's callback support is now > able to be ported to architectures with register-based calling conventions > (ARM, PowerPC, SPARC etc). I'll try and get the Alien code released soon, > and to back-port the changes to the standard VM before the end of the holiday. > One thing that is still /not/ fixed is the lack of a SoundPlugin on win32. > Apologies. I'll try and get a fix for this before the end of the holidays > too, but time might be too tight. There are other priorities such as > harmonising the standard and Cog VMs for the 4.2 release. > best > Eliot > >
