On Wed, Aug 16, 2017 at 10:07 AM, Tim Mackinnon <tim@testit.works> wrote:

This is very encouraging, and also very instructive (your post on snapshot is also one in this area too. I have a queue of things to try for you on Friday).

I'll try adding your ideas to my script and see if it squeezes some more.

And then I guess we need to to decide which parts go into your minimum build steps and which are an external script (or possibly a HeadlessImageCleaner class we keep loaded so it's easier to maintain?)

Tim

Sent from my iPhone
On 16 Aug 2017, at 08:52, Guillermo Polito <guillermopolito@gmail.com> wrote:
This means it would be healthy to do a cleanup (at least the non aggressive one, ChangeSets and MC stuff) on each of the images we produce and not just the latest one.
On Wed, Aug 16, 2017 at 8:35 AM, Tim Mackinnon <tim@testit.works> wrote:
Yes you were on to something there (and at the same time, by poking around with #pointersTo I noticed some chains of objects too). So I ran the following script (partially borrowed from ImageCleaner) and this has got me down to a 14mb image (instance sizes listed below, which is looking much healthier - and those MethodChangeRecords are gone too) !!!��

I suspect there are more monti/metacello things that are still lurking around.

I also wonder if I need some the character sorting strings too.
Tim
"CmdLine script to debug the initial minimal image"

| logger repo version |

logger := FileStream stderr.
logger cr; nextPutAll: 'Starting Minimal Cleanup Script...'.

logger cr; nextPutAll: '>Resetting Class Comments'.
Smalltalk allClasses do: [ :c | c classComment: '' stamp: '' ].

logger cr; nextPutAll: '>Removing MC holders'.
MCMethodDefinition allInstances do: [:each | each become: String new ].
MCClassDefinition allInstances do: [:each | each become: String new ].
MCVersionInfo allInstances do: [:each | each become: String new ].

logger cr; nextPutAll: '>ImageCleaner release routines'.
Smalltalk organization removeEmptyCategories.
   Smalltalk
      allClassesAndTraitsDo: [ :class |
         [ :each |
            each
               removeEmptyCategories;
               sortCategories ]
                  value: class organization;
                  value: class class organization ].

(RPackageOrganizer default packages select: #isEmpty)
    do: #unregister.

Smalltalk organization sortCategories.
Smalltalk garbageCollect.
Smalltalk cleanOutUndeclared.
Smalltalk fixObsoleteReferences.
Smalltalk cleanUp: true except: #() confirming: false.

logger cr; nextPutAll: '>GC'.
3 timesRepeat: [
        Smalltalk garbageCollect.
        Smalltalk cleanOutUndeclared.
        Smalltalk fixObsoleteReferences].

logger cr; nextPutAll: 'Finished Script.'; cr; cr.
My top instances are now:

Class �� code space # instances ��inst space �� percent �� inst average size
CompiledMethod �� 19159 �� 30481 �� 2912968 �� 21.60 �� 95.57
Array �� 3742 �� 36495 �� 2852448 �� 21.10 �� 78.16
ByteString �� 2640 �� 24018 �� 2517168 �� 18.60 �� 104.80
ByteSymbol �� 1698 �� 20722 �� 759208 �� 5.60 �� 36.64
Association �� 1148 �� 19786 �� 633152 �� 4.70 �� 32.00
IdentitySet �� 408 �� 15452 �� 494464 �� 3.70 �� 32.00
MethodDictionary �� 3310 �� 3520 �� 350192 �� 2.60 �� 99.49
Protocol �� 1679 �� 8382 �� 268224 �� 2.00 �� 32.00
WeakArray �� 1758 �� 265 �� 232304 �� 1.70 �� 876.62
OrderedCollection �� 6555 �� 5043 �� 201720 �� 1.50 �� 40.00
ClassOrganization �� 5281 �� 3520 �� 168960 �� 1.30 �� 48.00
Metaclass �� 7184 �� 1748 �� 153824 �� 1.10 �� 88.00
On 15 Aug 2017, at 23:00, Guillermo Polito <guillermopolito@gmail.com> wrote:
Just a hunch: could you inspect ur��MethodChangeRecord instances ?
Le��mar. 15 ao��t 2017 �� 23:55, Tim Mackinnon <tim@testit.works> a ��crit��:
A weird observation - is it possible that source code is being stored in the image as strings somehow? When I do

./pharo PharoLambda.image eval "ByteString allInstances inject: (OrderedCollection new) into: [:r :i | i size > 500 ifTrue: [r add: i]. r]"

I see to see reams of what looks like method source - but I thought source code was stored in the .sources file and the .changes file (and I haven��t been bundling those in my deployed image).

I��m trying to figure out how you find references to a string object, to chase down what is pointing to these strings as maybe there is a quick 4mb win by simply nil��ing out some obvious things. (This doesn��t of course help with a default minimal image - but maybe a few tricks for packaging and deploying something).

Tim
On 15 Aug 2017, at 22:26, Tim Mackinnon <tim@testit.works> wrote:
Hi Guille/Ben - I got a quick moment to try the SpaceTally (aside: it seems very convoluted to load a single package into the image, I was trying to avoid having to create a baselineOf for something so simple - I ended up with:

repo := MCFileTreeRepository new directory: './bootstrap' asFileReference.
version := repo loadVersionFromFileNamed: 'Tool-Profilers.package'.
version load.
Anyway - in my minimal image, like in the fat image there seems to be a surprising amount of bytestrings (4mb worth?). I think that might need some digging into? It seems like a lot somehow. Although Ben��s neat experiment of zipping strings shows that��s not a real route.

In a deployed minimal image - maybe I can get rid of some other things like MethodChangeRecords or MCMethodDefiniion��s (but they are smaller wins - but noticeable)

Class �� code space # instances ��inst space �� percent �� inst average size
ByteString �� 2640 �� 37365 �� 4823848 �� 21.50 �� 129.10
Array �� 3742 �� 53002 �� 3961944 �� 17.60 �� 74.75
CompiledMethod �� 19159 �� 30481 �� 2912968 �� 13.00 �� 95.57
Association �� 1148 �� 58348 �� 1867136 �� 8.30 �� 32.00
MethodChangeRecord �� 431 �� 34312 �� 1097984 �� 4.90 �� 32.00
ByteArray �� 4605 �� 290 �� 908728 �� 4.00 �� 3133.54
ByteSymbol �� 1698 �� 22689 �� 840168 �� 3.70 �� 37.03
IdentitySet �� 408 �� 19076 �� 610432 �� 2.70 �� 32.00
MethodDictionary �� 3310 �� 3520 �� 608688 �� 2.70 �� 172.92
WeakArray �� 1758 �� 3024 �� 597824 �� 2.70 �� 197.69
MCMethodDefinition �� 4318 �� 6659 �� 426176 �� 1.90 �� 64.00
Protocol �� 1679 �� 8382 �� 268224 �� 1.20 �� 32.00
OrderedCollection �� 6555 �� 5509 �� 220360 �� 1.00 �� 40.00��

As an aside - my Gitlab project is public, the scripts that load things up are in ./scripts (build.sh, and minimal.st��and loadlocal.st)

Tim

On 15 Aug 2017, at 08:02, Guillermo Polito <guillermopolito@gmail.com> wrote:

On Mon, Aug 14, 2017 at 4:42 PM, Tim Mackinnon��<tim@testit.works>��wrote:
Hi Guille - just running SpaceTally on my dev image to get a feel for it. It turns out that in the minimal images you��ve been creating, its not loaded (makes sense).

Yup, it's loaded afterwards.

All packages are loaded through metacello baselines. We should start refactoring and making standalone projects, each one with a baseline for himself, and his own dependencies described.

I was checking on your gitlab and I have probably no access: how are you finally loading packages in the bootstrap image? Can you share that with us in text? I'd like to improve that situation.
��
I��m wondering if there is an easy way to import it in (I guess that package should be in the Pharo git tree I cloned to get Fuel loaded right? Or is there a separate standalone source?).

Yes it is, you can get the package programatically doing��

SpaceTally package name

And furthermore, get the baseline that currently is loading by doing

package := SpaceTally package name.
BaselineOf subclasses select: [ :e |��
e project version packages anySatisfy: [ :p | p name = package ]].
��

Thanks for all the support, and your email about why the contexts stack up is very well received (I will comment over there).

By the way - it looks like Martin Fowler picked up on this announcement - so maybe we might get some interest from his mass of followers.

Tim

On 14 Aug 2017, at 10:49, Guillermo Polito <guillermopolito@gmail.com> wrote:

Hi Tim,

On Mon, Aug 14, 2017 at 11:41 AM, Tim Mackinnon��<tim@testit.works>��wrote:
Hey guys, thanks for your enthusiasm around this - and I cannot stress enough how this was only possible because of the work that has gone into making Pharo (in particular the 64bit image, as well as having a minimal image, and some great blog posts on serialising contexts) as well as the patience from everyone in answering questions and helping me get it all working.

I��m still quite keen to get my execution time back down under 800ms and I��d like to actually get back to writing a few skills to automate a few things around my house.

To Answer Denis�� question -��

My final footprint is 30.4mb - thats composed of a 22mb image (with a simple example that pulls in Fuel, ZTimestamp and the S3 Library which depends on XMLParser) and then the VM (from which I removed obvious dll��s).

In my original experiments with a 6.0 minimal image - I did manage to get to a 13.4mb image (which started out as 12mb original size, and then loaded in STON and had only a simple clock example). I think the sweet spot is around 20mb total footprint as that seems to get me into the 450ms-900ms range.

The 7.0 min image now starts out at 15mb and then I��m not sure why loading Fuel, S3 and XMLParser takes 7mb (it seems big to me - but I��ve not dug into that).

You can do further space analysis using the following expression

SpaceTally ��new printSpaceAnalysis

You can do that in an eval and check what's taking space. With measures we can iterate and improve :).
��
I��ve also found (and this on the back of unserialising the context in my example) that the way we build images has 15+ saved stack sessions that have saved on top of each other from the way we build up the images. I don��t yet know the implications of size/speed of these - but we need a better way of folding executions when we snapshot headless images. I��m also not clear if there are any other startup tasks that take precious time (this also has implications for our fat development images as they take much longer to appear than they really should).

I'm working on this as I'm writing this mail ;)

https://pharo.fogbugz.com/f/cases/20309
https://github.com/pharo-project/pharo/pull/196��

I'll write down the implications further in a different thread.

I��ll be exploring some of these size/speed tradeoff��s in follow on messages.

But once again, a big thanks - I��ve not enjoyed programming like this for ages.

Tim

On 12 Aug 2017, at 16:26, Ben Coman <btc@openInWorld.com> wrote:

hi Tim, ��

That is..... �� AWESOME!

Very nice delivery - it flowed well with great narration.��

I loved @2:17 "this is the interesting piece, because PharoLambda has serialized the execution context of its application and saved it into [my S3 bucket] ... [then on the local machine] rematerializes a debugger [on that context]."

There is a clarity in your video presentation that really may intrigue outsiders. As a community we should push this on the usual hacker forums - ycombinator could be a good starting point (but I'm locked out of my account there). ��
An enticing title could be...
"Debugging Lambdas by re-materializing saved execution contexts on your local machine."

cheers -ben

On Fri, Aug 11, 2017 at 3:37 PM, Denis Kudriashov��<dionisiydk@gmail.com>��wrote:
This is cool Tim.

So what image size you deployed at the end?

2017-08-10 15:47 GMT+02:00 Tim Mackinnon��<tim@testit.works>:
I just wanted to thank everyone for their help in getting my pet project further along, so that now I can announce that PharoLambda is now working with the V7 minimal image and also supports post mortem debugging by saving a zipped fuel context onto S3.

This latter item is particularly satisfying as at a recent serverless conference (JeffConf) there was a panel where poor development tools on serverless platforms was highlighted as a real problem.

In our community we��ve had these kinds of tools at our fingertips for ages - but I don��t think the wider development community has really noticed. Debugging something short lived like a Lambda execution is quite startling, as the current answer is ��add more logging��, and we all know that sucks. To this end, I��ve created a little screencast showing this in action - and it was pretty cool because it was a real example I encountered when I got everything working and was trying my test application out.

I��ve also put a bit of work into tuning the excellent GitLab CI tools, so that I can cache many of the artefacts used between different build runs (this might also be of interest to others using CI systems).

The Gitlab project is on:��https://gitlab.com/macta/PharoLambda
And the screencast:��https://www.youtube.com/watch?v=bNNCT1hLA3E

Tim

On 15 Jul 2017, at 00:39, Tim Mackinnon <tim@testit.works> wrote:

Hi - I��ve been playing around with getting Pharo to run well on AWS Lambda. It��s early days, but I though it might be interesting to share what I��ve learned so far.

Usage examples and code at��https://gitlab.com/macta/PharoLambda

With help from many of the folks here, I��ve been able to get a simple example to run in 500ms-1200ms with a minimal Pharo 6 image. You can easily try it out yourself. This seems slightly better than what the GoLang folks have been able to do.

Tim

--��
��
Guille Polito

Research Engineer
French National Center for Scientific Research -��http://www.cnrs.fr

Web:��http://guillep.github.io
Phone:��+33 06 52 70 66 13

--��
��
Guille Polito

Research Engineer
French National Center for Scientific Research -��http://www.cnrs.fr

Web:��http://guillep.github.io
Phone:��+33 06 52 70 66 13
--

��

Guille Polito

Research Engineer
French National Center for Scientific Research - http://www.cnrs.fr

Web: http://guillep.github.io
Phone: +33 06 52 70 66 13
--

��

Guille Polito

Research Engineer

French National Center for Scientific Research - http://www.cnrs.fr

Web: http://guillep.github.io

Phone: +33 06 52 70 66 13

��	Guille Polito Research Engineer French National Center for Scientific Research - http://www.cnrs.fr Web: http://guillep.github.io Phone: +33 06 52 70 66 13