June 2015 - Pharo-dev - lists.pharo.org

Repeatable VM crash
by Hilaire Jan. 5, 2016

Jan. 5, 2016

When playing with equality in a class hierarchy I have repeatable VM crash. It is today Pharo VM 3.9-7 from Jenkins and Pharo3. Am I using an out of date VM? Crashdump enclosed Hilaire -- Dr. Geo - http://drgeo.eu iStoa - http://istoa.drgeo.eu

5 16

[Pharo-project] Do we have the new primitive?? [WAS] Re: IdentitySet but using #hash rather than #identityHash ?
by Mariano Martinez Peck Dec. 16, 2015

Dec. 16, 2015

> All I can say is that I am impressed by the numbers it is really much >> faster. >> I still don't understand why I send this email with a subject say >> IdentitySet because what I really need is a fast/large IdentityDictionary >> :( Anyway, there's a place where we can use this LargeIdentitySet in Fuel >> I think). >> >> So Levente, you say this is not possible to adapt this for dictionary? >> can >> we contact Eliot to provide such a primitive? >> > > As promised, I uploaded my LargeIdentityDictionary implementation to > http://leves.web.elte.hu/**squeak/**LargeIdentityDictionary.st<http://leves.web.elte.hu/squeak/LargeIdentityDictionary.st>. > The numbers will be a bit worse compared to LargeIdentitySet, because of > the lack of the primitive, but it's still 2-3x faster than other solutions > (IdentityDictionary, PluggableIdentityDictionary, subclassing, etc). I'm > about to propose this primitive with other improvements on the vm-dev list. > > Hi Eliot/Levente. What is the status of this? Do we have already the new primitive? If true, how can we adapt LargeIdentitySet to use such new primitive? Thanks! > > Levente > > >> thanks >> >> On Fri, Dec 16, 2011 at 3:28 PM, Levente Uzonyi <leves(a)elte.hu> wrote: >> >> On Fri, 16 Dec 2011, Henrik Sperre Johansen wrote: >>> >>> On 16.12.2011 03:26, Levente Uzonyi wrote: >>> >>>> >>>> >>>>> How about my numbers? :) >>>>> >>>>> "Preallocate objects, so we won't count gc time." >>>>> n := 1000000. >>>>> objects := Array new: n streamContents: [ :stream | >>>>> n timesRepeat: [ stream nextPut: Object new ] ]. >>>>> >>>>> set := IdentitySet new: n. >>>>> Smalltalk garbageCollect. >>>>> [1 to: n do: [ :i | set add: (objects at: i) ] ] timeToRun. "4949" >>>>> >>>>> set := LargeIdentitySet new. >>>>> Smalltalk garbageCollect. >>>>> [1 to: n do: [ :i | set add: (objects at: i) ] ] timeToRun. "331" >>>>> >>>>> set := (PluggableSet new: n) >>>>> hashBlock: [ :object | object identityHash * 4096 + object class >>>>> identityHash * 64 ]; "Change this to #basicIdentityHash in Pharo" >>>>> equalBlock: [ :a :b | a == b ]; >>>>> yourself. >>>>> Smalltalk garbageCollect. >>>>> [1 to: n do: [ :i | set add: (objects at: i) ] ] timeToRun. "5511" >>>>> >>>>> >>>>> I also have a LargeIdentityDictionary, which is relatively fast, but >>>>> not >>>>> as fast as LargeIdentitySet, because (for some unknown reason) we don't >>>>> have a primitive that could support it. If we had a primitive like >>>>> primitive 132 which would return the index of the element if found or >>>>> 0 if >>>>> not, then we could have a really fast LargeIdentityDictionary. >>>>> >>>>> >>>>> Levente >>>>> >>>>> Hehe yes, if writing a version fully exploiting the limited range, >>>> that's >>>> probably the approach I would go for as well. >>>> (IAssuming it's the version at http://leves.web.elte.hu/** >>>> squeak/LargeIdentitySet.st<htt**p://leves.web.elte.hu/squeak/** >>>> LargeIdentitySet.st<http://leves.web.elte.hu/squeak/LargeIdentitySet.st> >>>> > >>>> ) >>>> >>>> Mariano commented in the version at http://www.squeaksource.com/** >>>> FuelExperiments <http://www.squeaksource.com/**FuelExperiments<http://www.squeaksource.com/FuelExperiments>> >>>> that it's >>>> >>>> slow for them, which I guess is due to not adopting #identityHash calls >>>> to >>>> #basicIdentityHash calls for Pharo: >>>> ((0 to: 4095) collect: [:each | each << 22 \\ 4096 ]) asSet size -> 1 >>>> So it basically uses 1 bucket instead of 4096... Whoops. :) >>>> >>>> Uploaded a new version to the MC repository which is adapted for Pharo, >>>> on the same machine my numbers were taken from, it does the same test >>>> as I >>>> used above in 871 ms. (181 with preallocation). >>>> >>>> >>> Cool. One more thing: in Squeak the method using primitive 132 directly >>> was renamed to #instVarsInclude:, so now #pointsTo: works as expected. If >>> this was also added to Pharo, then the #pointsTo: sends should be changed >>> to #instVarsInclude:, otherwise Array can be reported as included even if >>> it wasn't added. >>> I'll upload my LargeIdentityDictionary implementation to the same place >>> this evening, since it's still 2-3 factor faster than other solutionts >>> and >>> there seem to be demand for it. >>> >>> >>> Levente >>> >>> >>> Cheers, >>>> Henry >>>> >>>> >>>> >>>> >>> >> >> -- >> Mariano >> http://marianopeck.wordpress.**com <http://marianopeck.wordpress.com> >> >> > -- Mariano http://marianopeck.wordpress.com

3 5

[Pharo-project] StandardFileStream size limit?
by GÃ¶ran Krampe Nov. 13, 2015

Nov. 13, 2015

Hey all! I have just added large file (chunkwise upload and download) support to Kom/Networking/Iliad in Pharo 1.4 and while testing it I tried uploading a 2.9Gb file. I haven't looked at the exact error message, and I haven't tried writing a trivial test - but the "half written" file on disk is almost EXACTLY 2Gb (2147483647) so I am wondering - do we still have a 2Gb file size limit? This is "one click 1.4" on Ubuntu 64 with ext4. regards, GÃ¶ran

7 10

Yet another Athens font thread
by Aliaksei Syrel Oct. 11, 2015

Oct. 11, 2015

Hi I noticed that if I force use "Source Code Pro" as standard font for all elements in the image I never have problems with font rendering. In case of "Source Sans Pro" font is just not usable becasue of rendering bugs on mac, windows and linux(?). If "Lucida Sans Pro" is used - no bugs too. Because bug is reproducable on all platform - it's platform independent bug. Because it's reproducable only with one specific font - maybe it's not an athens issue but bug in font itself and if someone could change/update Source Sans Pro to a newly version or to a similar font the problem will be solved? Cheers, Alex

3 6

[ANN]: AconcaguaAddOns
by Sean P. DeNigris Oct. 9, 2015

Oct. 9, 2015

I pushed some Aconcagua extensions to http://smalltalkhub.com/mc/SeanDeNigris/AconcaguaAddOns/main/ One part consists of tiny (so far) Aconcagua models of various domains - Time*, Money, and Weight at the moment. The other is the Aconcagua-Magritte package. This gives you MAMeasureDescription, which represents an Aconcagua Measure. It mostly acts like a number field mapped to its amount. You just have to tell it which unit to use to convert the amount number into a Measure. Example usage: MAMeasureDescription new accessor: #replacementPrice; label: 'Replacement Price'; unit: AmDollar new; yourself Then, you can type 100 in a Magritte form and "100 dollars" will be saved to the model. Enjoy! * Yes, I know Chalten has months and years, but (I think when Chalten was extended to handle non-Gregorian calendars) months and year units are no longer derived from each other, and so can not be compared. ----- Cheers, Sean -- View this message in context: http://forum.world.st/ANN-AconcaguaAddOns-tp4820940.html Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com.

3 6

ARM Cogit
by Eliot Miranda Oct. 7, 2015

Oct. 7, 2015

Hi All, thanks to hard work by Tim Rowledge and Lars Wasserman we now have a functional JIT for the ARM in the simulator. We're still probably some weeks away from a functional ARM JIT VM; issues like instruction cache flushing on real hardware can be tricky to solve. But we're at least ready to start trying to compile the JIT VM for ARM. Doug, see that I added a build directory for build.linux32ARM/squeak.cog.spur. Hopefully a fast VM for Raspberry Pi and Android is only a few weeks away. -- best, Eliot

8 10

"missing" exports on the windows vm
by Nicolai Hess Sept. 14, 2015

Sept. 14, 2015

We have a failing test case for NB NBInterpreterProxyTest>>#testStackPointer it fails because NativeBoost loadSymbol: 'stackPointerAddress' fromModule: NativeBoost VMModule returns nil This works for the linux vm! There are other methods that can be loaded, for example: (NativeBoost loadSymbol: 'primitiveAllObjects' fromModule: NativeBoost VMModule) -> returns an address. This stopped working for the windows pharo vm around june 2014. The source that changed is cointerp.h, the prior version had EXPORT(...) declarations around all functions in cointerp.h, the current version not. Three questions: 1. Why does this still work on linux? Does it export all functions declared in a header? 2. why was it changed? (I could not found the change in the code generator, maybe we exported all functions with pragma #api and now only those with pragma #export ? 3. do we need this function to be exported? Apart from this testcases, this method is called the on image startup, but the nil return does not harm. It seems it is not part of the main vm api (like the interpreter proxy functions callable from external modules) and I didn't see code thet depend on this. There are similiar functions for which we load the function address on startup: cStackPointerAddress and cFramePointerAddress, this seems to work, but I don't know if the expected result is different. In NBInterpreterProxy>>#initialize, we try to load all fourmethods: stackPointerAddress/framePointerAddress -> nil cStackPointerAddress / cFramePointerAddress -> not nil nicolai

2 3

Maintainer of FFI-Package
by Nicolai Hess Sept. 12, 2015

Sept. 12, 2015

Who is the maintainer of the FFI-Package for Squeak and/or Pharo ? I especially interested in the FFI-Unix examples and the state on working FFI on linux for current squeak release (AFAIK it does not work with "squeak all in one" 4.5) regards Nicolai

3 6

[Reflectivity] Progress with Reifications
by Marcus Denker Sept. 11, 2015

Sept. 11, 2015

Hi, in Pharo5 #120 we have lots of progress with Reflectivity regarding to âreificated valuesâ. 1) more reificated value are working. #arguments - an array of the arguments of a message send or method #receiver - receiver of a message (or method executed) #context for Methods #sender for method and message This means we have now all the info needed to e.g. pass all date needed to do a message send on the meta level. (receiver, args, selector), or a variable store (#name, #newValue). 2) Reifications as arguments to conditions. When the block used as a condition has arguments, the name is matched to the possible reifications and if valid this value is passed as an argument. Very useful e.g. for object specific links: link := MetaLink new condition: [: object | object == <the object I am intersted in>]; metaObject: <someObject>; selector: <some selector> This link would only be active for this one object. 3) Reifications as meta object ------------- Every valid reified value can be the metaobject of the link. e.g. you can now define a link where the meta is the node where the Link is installed: link := MetaLink new metaObject: #node; selector: #tagHasBeenExecuted. Or the #receiver: link := MetaLink new metaObject: #receiver; selector: #perform:withArguments:; arguments: #(selector arguments). TODO -> #slot, #global. #variable reifications -> #after needs to wrap in ensure: -> primitives -> more tests -> optimize link preambles: when reifying both #arguments and #receiver, merge the preamble into one for performance.

3 4

ensure: and assignments RB Rule
by stepharo Sept. 8, 2015

Sept. 8, 2015

Hi guys I'm revisiting all the RB rule and I'm puzzled by this one. Checks assignment to a variable that is the first statement inside the value block that is also used in the unwind block. [| `@temps | `var := `@object. `@.statements] ensure: [`var `@messages: `@args] Does anybody have an idea? Stef

7 14