[Pharo-dev] PharoMinimal ?

Sven Van Caekenberghe sven at stfx.eu
Sun Oct 8 13:00:50 EDT 2017

Hi Pavel,

Thanks a lot for the explanation. To summarise: 70-minimal is the one with monticello and metacello in it that can load code via the config handler.

I was confused, because that failed for me.

Now, first doing

$ ./pharo pharo-minimal.image eval 'ZnMimeType initialize' 

fixed my loading problem. I also did the following because some of my project don't separate tests (I known ;-)

$ ./pharo pharo-minimal.image eval --save 'Object subclass: #TestCase'

With those fixes I was able to load different projects

$ ./pharo pharo-minimal config http://mc.stfx.eu/Neo ConfigurationOfZTimestamp --install=stable

$ ./pharo pharo-minimal config http://mc.stfx.eu/Neo ConfigurationOfNeoConsole --install=bleedingEdge

The image remains equally fast in startup

$ time ./pharo pharo-minimal.image eval ZTimestamp now
real	0m0.062s
user	0m0.025s
sys	0m0.029s

And it works perfectly as a server, like

$ ./pharo pharo-minimal eval --no-quit 'NeoConsoleTelnetServer new start' &

$ telnet localhost 4999
Connected to localhost.
Escape character is '^]'.
Neo Console Pharo-7.0+alpha.build.172.sha.d13eed2f80fe19f29fd85ede8c4809d6a6986d4f (32 Bit)
> get             
known metrics:
  system.status - Simple system status
  memory.total - Total allocated memory
  memory.free - Free memory
  memory.gc - Garbage collect, return free memory
  system.uptime - Image uptime human readeable
  system.uptimeseconds - Image uptime seconds
  system.date - Current date
  system.time - Current time
  system.timestamp - Current timestamp
  process.count - Current process count
  process.list - Current list of processes
  system.version - Image version info
  system.mcversions - Monticello packages version info
> get process.list
Delay Scheduling Process
Low Space Watcher
Idle Process
WeakArray Finalization Process
NeoConsoleTelnetServer port 4999
NeoConsoleTelnetServer port 4999 Connection Handler
> SessionManager default startupList collect: #handledId

#(#SmallInteger #Delay #ProcessorScheduler #OSPlatform #FileLocator #MCMethodDefinition #WeakArray #FileStream #MultiByteFileStream #EndianDetector #Symbol #LanguageEnvironment #Stdio #NonInteractiveTranscript #WeakFinalizationList #DiskStore #BasicCommandLineHandler #SourceFileArray #ASTCache #UUIDGenerator #InternetConfiguration #ZnLogEvent #ZnServer #Color #UIManagerSessionHandler #ZTimestamp)
Connection closed by foreign host.

Image size remains ~11Mb.

Very nice !

About the class initialisations. Why were they not done already ? You seem to have a list of them, why not make sure they are executed when creating the image ? I guess I could rewrite some of my code to do lazy initialization class side but I should not have to do that, should I ?


> On 8 Oct 2017, at 12:41, Pavel Krivanek <pavel.krivanek at gmail.com> wrote:
> Hi Sven,
> 2017-10-07 16:18 GMT+02:00 Sven Van Caekenberghe <sven at stfx.eu>:
> Hi,
> What is the story around PharoMinimal and related images ?
> Is there a writeup somewhere with instructions ?
> Right now the minimal (Metacello) image based on Pharo 7 is used only as intermediate step in building of the full Pharo and the only real (successful) attempt to use it for something else is PharoLambda (https://gitlab.com/macta/PharoLambda).
> In general it can be used for building of own (server) applications. E.g. this way you can install and run Teapot on it:
> ./pharo Pharo7.0-metacello-32bit-d13eed2.image config http://smalltalkhub.com/mc/zeroflag/Teapot/main ConfigurationOfTeapot --install=stable
> ./pharo Pharo7.0-metacello-32bit-d13eed2.image eval --no-quit "Teapot on GET: '/welcome' -> 'Hello World'; start."
> You can load baselines from the Git repositories too but we currently do not have any command line handler for it so you need to do it using "eval" command or *.st flile. Something like this:
> Metacello new
> 	baseline: 'Seaside3';
> 	repository: 'github://SeasideSt/Seaside:master/repository';
> 	load
> To make it more usable we probably should extend it with SUnit and Fuel. If you want to extend it with some packages from vanilla Pharo, you should load them using FileTree from your local Pharo repository clone.
> Gofer it
> 	url: 'filetree:///path-to-my-pharo-repository-clone/pharo/src';
> 	package: 'Multilingual-OtherLanguages';
> 	package: 'Multilingual-TextConverterOtherLanguages';
> 	load.
> It still needs some care. E.g. some classes from Zinc are not properly initialized (I know about DigitalSignatureAlgorithm MD5NonPrimitive RxMatcherRxParser RxsPredicate SHA1 ZnByteEncoder ZnConstants ZnMimeType ZnNetworkingUtils ZnServer ZnSingleThreadedServer TextConstants TextActionTextStyle).
> I tried to load Seaside into it today (from the example above) and it failed (some strange error probalby related to Unicode processing). But we will fix it. If you will tell me what exactly you need we can make it work together as in case of PharoLambda.
> I see that we get **FANTASTIC** startup speed with it:
> $ cat /etc/issue
> Ubuntu 16.04.3 LTS
> $ ./pharo --version
> 5.0-201708271955  Sun Aug 27 20:09:20 UTC 2017 gcc 4.6.3 [Production Spur VM]
> CoInterpreter VMMaker.oscog-eem.2265 uuid: 76b62109-629a-4c39-9641-67b53321df9a Aug 27 2017
> StackToRegisterMappingCogit VMMaker.oscog-eem.2262 uuid: 8b531242-de02-48aa-b418-8d2dde0bec6c Aug 27 2017
> VM: 201708271955 https://github.com/OpenSmalltalk/opensmalltalk-vm.git $ Date: Sun Aug 27 21:55:26 2017 +0200 $
> Plugins: 201708271955 https://github.com/OpenSmalltalk/opensmalltalk-vm.git $
> Linux testing-gce-ebf45dd8-6a4c-43a5-abd0-e5d8673d05a4 3.13.0-115-generic #162~precise1-Ubuntu SMP Fri Mar 24 16:47:06 UTC 2017 i686 i686 i386 GNU/Linux
> plugin path: /home/audio359/pharo7/pharo-vm/lib/pharo/5.0-201708271955 [default: /home/audio359/pharo7/pharo-vm/lib/pharo/5.0-201708271955/]
> $ curl get.pharo.org/70-minimal | bash
> ...
> $ ./pharo Pharo.image printVersion
> [version] 'Pharo7.0' 'Pharo-7.0+alpha.build.172.sha.d13eed2f80fe19f29fd85ede8c4809d6a6986d4f (32 Bit)'
> $ time ./pharo Pharo.image eval '5 factorial'
> 120
> real    0m0.083s
> user    0m0.034s
> sys     0m0.042s
> That is less than 1/10 of a second on a simple server ! Wow.
> Loading new code in that image seem hard though.
> I see that in http://files.pharo.org/image/70/ there are Pharomonticello & Pharometacello variants.
> Any pointers on usage/meaning ?
> Monticello is bootstrapped Pharo image with Monticello loaded. This image then loads Metacello and the generated image is the image that we call "minimal". It is minimal in sense minimal for common usage.
> During Pharo building process we generate:
> - bootstrapped image
> - image with Opal that is loaded as binary packages using Hermes
> - Monticello with only local repositories support
> - Monticello with network and remote repositories support
> - Metacello
> - full Pharo IDE (which is loaded as sequence of several standalone baselines)
> Cheers,
> -- Pavel
> Thx,
> Sven

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