June 2014 - Pharo-dev - lists.pharo.org

Re: [Pharo-dev] Performance for Video Games(Woden Video)

by Alexandre Bergel

This is impressive stuff. I have seen this running, it is smooth like hell. Strange that this feel a bit sluggish in the video. When Ronie demonstrated this to me it was smooth smooth smooth. I am really happy to see this happening. Performance exhibited by OSWindow and Woden are remarkable. It may very well be that the future of Roassal is on this. Ronie will be at ESUG, and yes, he will be happy to demonstrate this. Go go go Ronie! Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. On Jun 12, 2014, at 11:16 PM, Ronie Salgado <roniesalg(a)gmail.com> wrote: > I am working on making a video game engine in Pharo. Recently added a FPS counter and recorded some samples: http://youtu.be/-2ida5Q1mbg . > > Lets say I was quite surprised, so I have yet a lot more to optimize, but a good trick seems to be making some computation in the GPU. > > In this video, I show 6 early examples. The water example is still incomplete, missing reflection/refractions, but it shows what happens when I compute the water waves using a shader in the GPU. > > Please, pay a close attention to the FPS count. > > BTW, it feels slow because of the screen capture and the tearing is there because I haven't enabled vsync, but I have support for it. > > Greetings, > Ronie Salgado

June 13, 2014

Re: [Pharo-dev] [Moose-dev] CodeCity and Spec

by Johan Fabry

Hola, AFAIK there are no plans for that. Maybe there is an alternative: there is a Roassal2 adaptor for Spec, Roassal2Spec package, which should now come with Roassal2. It allows you to have any Roassal2 visualization as a Spec ComposableModel. On Jun 13, 2014, at 4:47 AM, Yuriy Tymchuk <yuriy.tymchuk(a)me.com> wrote: > Hi all, > > are there any suggestions for integrating CodeCity into Spec? E.g. using CodeCity visualisation in a view build by Spec. > > Uko > _______________________________________________ > Moose-dev mailing list > Moose-dev(a)iam.unibe.ch > https://www.iam.unibe.ch/mailman/listinfo/moose-dev > ---> Save our in-boxes! http://emailcharter.org <--- Johan Fabry - http://pleiad.cl/~jfabry PLEIAD lab - Computer Science Department (DCC) - University of Chile

June 13, 2014

Re: [Pharo-dev] Streaming uploads with Zinc (was: Kom or Swazoo?)

by Torsten Bergmann

See these links: http://www.swazoo.org/streaming.html http://forum.world.st/Re-Seaside-Re-Re-squeak-dev-Q-File-Upload-Download-Se… http://web.archiveorange.com/archive/v/z305jws8suX1ch34fuzR http://lists.squeakfoundation.org/pipermail/seaside/2008-August/018510.html > Gesendet: Freitag, 13. Juni 2014 um 13:05 Uhr > Von: "Sven Van Caekenberghe" <sven(a)stfx.eu> > An: "Torsten Bergmann" <astares(a)gmx.de> > Cc: seaside(a)lists.squeakfoundation.org, "Pharo Development List" <pharo-dev(a)lists.pharo.org> > Betreff: Re: Streaming uploads with Zinc (was: Kom or Swazoo?) > > Yes, I saw that too. > > Now, I do remember something from long ago, but I forgot the details. > > So the question is: what is the exact issue ? > > What is a 'streaming upload' ? > > On 13 Jun 2014, at 12:34, Torsten Bergmann <astares(a)gmx.de> wrote: > > > Hi Sven, > > > > following a discussion about Kom/Swazoo on the Seaside list: > > > > http://lists.squeakfoundation.org/pipermail/seaside/2014-June/030968.html > > > > there was a question if Zinc does support streaming uploads. > > > > Can you comment on that? > > > > Thanks > > T. > >

June 13, 2014

Re: [Pharo-dev] Streaming uploads with Zinc (was: Kom or Swazoo?)

by Sven Van Caekenberghe

Yes, I saw that too. Now, I do remember something from long ago, but I forgot the details. So the question is: what is the exact issue ? What is a 'streaming upload' ? On 13 Jun 2014, at 12:34, Torsten Bergmann <astares(a)gmx.de> wrote: > Hi Sven, > > following a discussion about Kom/Swazoo on the Seaside list: > > http://lists.squeakfoundation.org/pipermail/seaside/2014-June/030968.html > > there was a question if Zinc does support streaming uploads. > > Can you comment on that? > > Thanks > T.

June 13, 2014

Streaming uploads with Zinc (was: Kom or Swazoo?)

by Torsten Bergmann

Hi Sven, following a discussion about Kom/Swazoo on the Seaside list: http://lists.squeakfoundation.org/pipermail/seaside/2014-June/030968.html there was a question if Zinc does support streaming uploads. Can you comment on that? Thanks T.

June 13, 2014

Re: [Pharo-dev] Spur Squeak Trunk Image Available

by Esteban Lorenzano

On 13 Jun 2014, at 04:29, Eliot Miranda <eliot.miranda(a)gmail.com> wrote: > > > On Thu, Jun 12, 2014 at 10:48 PM, stepharo <stepharo(a)free.fr> wrote: > Thanks eliot. > As soon as it is available for Pharo we will try with some large moose images. > > OK, but just so you know I'm not going to do the Pharo bootstrap. I hope someone in your team will have a go. I'm happy to help but I don't know Pharo well enough to do this. It's a matter of making sure the Monticelo packages can be edited. The Squeak code may just work but I wouldn't know. yes, Iâm on it :) Esteban > > > Stef > > > On 13/6/14 01:41, Eliot Miranda wrote: > Hi All, > > it gives me great pleasure to let you know that a spur-format trunk Squeak image is finally available athttp://www.mirandabanda.org/files/Cog/SpurImages/. Spur VMs are available at http://www.mirandabanda.org/files/Cog/VM/VM.r2987/. > > Spur is a new object representation and garbage collector for Squeak/Pharo/Croquet/Newspeak. > > Features > The object representation is significantly simpler than the existing one, and hence permits a lot of JIT optimizations, in particular allocating objects in machine code. This speeds up new, new: et al, but also speeds up blocks because contexts and closures are now allocated in machine code. It also provides immediate characters, so for example accessing wide strings is much faster in Spur, since characters do not have to be instantiated to represent characters with codes greater than 255. > > The garbage collector has a scavenger and a global scan-mark-compact collector. The scavenger is significantly faster than the existing pointer-reversal scan-mark-compact, hence GC performance is much improved. > > The memory manager manages old space as a sequence of segments, as opposed to the single contiguous space provided by the existing memory manager. The memory manager grows the heap a segment at a time, and can and will release empty segments back to the host OS after a full GC. Hence Spur is able to grow the heap to the limit of available memory without one having to specify the VM's memory size at start-up. > > The object representation uses "lazy forwarding" to implement become:, creating copies of objects that are becommed, and forwarding the existing objects to the copies. While Spur still scans the stack zone on become to ensure no forwarding pointers to the receiver exist in stack frames (for check-free push and store instance variable operations), it does not scan the entire heap, catching sends to forwarded objects as part of the normal message send class checks, hence following forwarding pointers lazily, and eliminating forwarders during GC. The existing memory manager does a full memory sweep and compact to implement become. Hence Spur provides the performance advantages of direct pointers while providing a significantly faster become. > > While Spur uses moving GC (scavenging and compaction on full GC), just like the existing memory manager, Spur supports pinning, the ability to stop an object from moving. Old space objects will not be moved if pinned. Attempting to pin a new space object causes a become, forwarding the new space object to a pinned copy in old space. This allows simpler interfacing with foreign code through the FFI, since one can hand out references to pinned objects in the knowledge that they will not be moved by the GC. > > Finally Spur supports ephemerons in a simple and direct way, providing pre-mortem per-instance finalization. Although the image-level support needs to be written, it should soon be possible to improve the finalization of entities such as buffered files (ensuring they are flushed before being GCed), etc. > > > Future Work > Spur is as yet a work in progress. The 32-bit implementation is usable and appears stable. The major missing component is an incremental scan-mark GC that should eliminate long pauses due to the global scan-mark-compact GC (which is still invoked at snapshot time). I hope to start on this soon. But another key facet of Spur is that the object header format and the sizes of objects are common between 32- and 64-bits. In 32-bit and 64-bit Spur, object bodies are multiples of 8 bytes, so there may be an unused slot at the end of a 32-bit object with an odd number of slots. Hence Spur is close to providing a "true" 64-bit system, one with 61-bit SmallIntegers, and 61-bit SmallFloats (objects with the same precision, but less range that 64-bit Float, done by stealing bits from the exponent field). I look forward to collaborating with Esteban Lorenzano on 64-bit Spur and hope that it will be available early next year. > > > Experience > I am of course interested in reports of performance effects. Under certain, hopefully rare circumstances, Spur may actually be slower (one is when the number of processes involved in process switching exceeds the number of stack pages in the stack zone). But my limited experience is that Spur is significantly faster than the existing VM. Please post experiences, both positive and negative. > > Finally, caveat emptor! This is alpha code. Bugs may result in image corruption. If you do use Spur, please try and back up your work just in case. And if anything does go wrong please let me know, preferrably providing a reproducible case. > > > Enjoy! > Eliot Miranda > > > > > > -- > best, > Eliot

June 13, 2014

Re: [Pharo-dev] Performance for Video Games(Woden Video)

by Esteban Lorenzano

cool :) using OSWindow and SDL2, I suppose? how can I play with that? cheers, Esteban On 13 Jun 2014, at 00:16, Ronie Salgado <roniesalg(a)gmail.com> wrote: > I am working on making a video game engine in Pharo. Recently added a FPS counter and recorded some samples: http://youtu.be/-2ida5Q1mbg . > > Lets say I was quite surprised, so I have yet a lot more to optimize, but a good trick seems to be making some computation in the GPU. > > In this video, I show 6 early examples. The water example is still incomplete, missing reflection/refractions, but it shows what happens when I compute the water waves using a shader in the GPU. > > Please, pay a close attention to the FPS count. > > BTW, it feels slow because of the screen capture and the tearing is there because I haven't enabled vsync, but I have support for it. > > Greetings, > Ronie Salgado

June 13, 2014

CodeCity and Spec

by Yuriy Tymchuk

Hi all, are there any suggestions for integrating CodeCity into Spec? E.g. using CodeCity visualisation in a view build by Spec. Uko

June 13, 2014

Re: [Pharo-dev] [website] new news entry: talk NDC Oslo

by Sven Van Caekenberghe

On 13 Jun 2014, at 09:31, Tudor Girba <tudor(a)tudorgirba.com> wrote: > If the fonts get much larger, having several panes side-by-side makes things look ugly and you kind of lose the perspective :(. I think the GTTools take up too much screen space. I know that today we have bigger screens and we should use them, but still. This is of course a subjective opinion, a feeling.

June 13, 2014

Re: [Pharo-dev] [website] new news entry: talk NDC Oslo

by Tudor Girba

The room was flat with several monitors around, and people could see well (I tested beforehand). If the fonts get much larger, having several panes side-by-side makes things look ugly and you kind of lose the perspective :(. That is why I am so looking forward for Bloc (so that I can scale things nicely) :). Cheers, Doru On Fri, Jun 13, 2014 at 7:50 AM, stepharo <stepharo(a)free.fr> wrote: > Hi doru > > did you get problems with the fonts? Because I was wondering why you did > not make them a bit larger. > > Stef > > On 11/6/14 16:10, Tudor Girba wrote: > > Thanks :). > > Just some background information: > > As you can see, I used the GTInspector to show the liveliness of the > system. I actually used the Moose image + some other goodies (like Seaside, > Postgres connection and a couple of others). I tried this story for the > first time, and while it still needs a bit of polishing, I think it works > well on two levels: > - you can use it as an argument for people to start adopting Pharo as a > programming platform by emphasizing the liveliness, > - but at the same time you can use the same demo to show how using Pharo > can replace scripting, querying and charting tools for common tasks like > string, file system or db manipulation. This in itself is a niche that we > can tap on. > > The result was that people actually got excited, and the message rippled > a bit and I got to do several other demos outside the public session. > > Every step you saw in the demo is setup through a script that gets > triggered from the world menu. These scripts spawns windows and sets the > state of objects. It's really simple, but it accelerates the demo. My goal > is to get a demo that can be repeated by others in other contexts out of > the box. There are still some setup issues, but once I get it done, I will > make it more public. In the meantime, if you want to contribute or play > with it you can use the following script in a Moose image: > > Gofer new > smalltalkhubUser: 'PharoExtras' project: 'PostgresV2'; > configuration; > load. > (#ConfigurationOfPostgresV2 asClass project version: '2.0-baseline') load. > > Gofer new > smalltalkhubUser: 'Moose' project: 'GToolkit'; > package: 'GT-InspectorExtensions-PostgresV2'; > package: 'GT-InspectorExtensions-XML'; > load. > > Gofer new > smalltalkhubUser: 'RichardWettel' project: 'CodeCity'; > configuration; > loadDevelopment. > > Gofer new > smalltalkhubUser: 'PharoExtras' project: 'MorphExamplesAndDemos'; > package: 'MorphExamplesAndDemos'; > load. > Gofer new > smalltalkhubUser: 'Moose' project: 'GToolkit'; > package: 'GT-InspectorExtensions-MorphExamplesAndDemos'; > load. > > Gofer new > smalltalkhubUser: 'Moose' project: 'GToolkit'; > package: 'GT-Scenery'; > load. > > > Cheers, > Doru > > > > On Wed, Jun 11, 2014 at 11:31 AM, kilon alios <kilon.alios(a)gmail.com> > wrote: > >> very good presentation that clearly shows the capabilities of Pharo. If >> that does not convince people to use / try pharo, nothing will :) >> >> >> On Wed, Jun 11, 2014 at 11:33 AM, Marcus Denker <marcus.denker(a)inria.fr> >> wrote: >> >>> Hi, >>> >>> I added a new entry: >>> >>> http://pharo.org/news/playing-with-live-objects >>> >>> >>> Marcus >>> >> >> > > > -- > www.tudorgirba.com > > "Every thing has its own flow" > > > -- www.tudorgirba.com "Every thing has its own flow"

June 13, 2014