October 2011 - Pharo-users - lists.pharo.org

Re: [Pharo-users] Cog vs CogMT?

by StÃ©phane Ducasse

Thanks igor yes indeed this is important. Stef >>> >>> Hi - >>> >>> When should the multi-threaded version of Cog be used vs the single >>> threaded version? Is either one more stable or performant, etc? >>> >> >> The MT of Cog is only for FFI as much as I understand. The VM itself >> continues to be a green thread, even with CogMT. So no, there is not >> performance change, only in FFI. >> That being said, I never hear someone apart from Eliot successfully using >> CogMT with real multithreaded FFI. There may be some work still to do before >> you can use it. >> > > I plan to change the VMs on Jenkins server to build using MT version > of (co)interpreter. > > I misunderstood Eliot's statement once, when he said that MT version > of VM is 5% slower, > but then Eliot clarified that this slowdown related only to FFI, not > the whole VM. > > > -- > Best regards, > Igor Stasenko. >

Oct. 22, 2011

Re: [Pharo-users] Inconsistent links for Pharo 1.3 versions

by StÃ©phane Ducasse

Thanks for the catch :) Stef On Oct 22, 2011, at 2:46 PM, Marco A. Gonzalez wrote: > FYI for whomever is maintaining the pharo pages... > On http://www.pharo-project.org/home and all other pages, the upper right icon badge to download the Pharo 1.3 One Click installer downloads version 13315 (1) whereas on the download page, the rest of the links refer to version 13307 (2). > > Summary: > (1) The icon badge has.... https://gforge.inria.fr/frs/download.php/29274/Pharo-1.3-13315-OneClick.zip > (2) The Pharo 1.3. one-click distribution section has.... http://gforge.inria.fr/frs/download.php/29054/Pharo-1.3-13307-OneClick.zip > (3) In the Custom downloads section, the Pharo 1.3 link has.... http://gforge.inria.fr/frs/download.php/29053/Pharo-1.3-13307.zip > > The above said... thank you for all you do. > > - Marco A. > > >

Oct. 22, 2011

Inconsistent links for Pharo 1.3 versions

by Marco A. Gonzalez

FYI for whomever is maintaining the pharo pages... On http://www.pharo-project.org/home and all other pages, the upper right icon badge to download the Pharo 1.3 One Click installer downloads version 13315 (1) whereas on the download page, the rest of the links refer to version 13307 (2). Summary: (1) The icon badge has.... https://gforge.inria.fr/frs/download.php/29274/Pharo-1.3-13315-OneClick.zip (2) The Pharo 1.3. one-click distribution section has.... http://gforge.inria.fr/frs/download.php/29054/Pharo-1.3-13307-OneClick.zip (3) In the Custom downloads section, the Pharo 1.3 link has.... http://gforge.inria.fr/frs/download.php/29053/Pharo-1.3-13307.zip The above said... thank you for all you do. - Marco A.

Oct. 22, 2011

Re: [Pharo-users] Cog vs CogMT?

by Igor Stasenko

On 21 October 2011 21:24, Mariano Martinez Peck <marianopeck(a)gmail.com> wrote: > > > On Fri, Oct 21, 2011 at 7:12 PM, Paul DeBruicker <pdebruic(a)gmail.com> wrote: >> >> Hi - >> >> When should the multi-threaded version of Cog be used vs the single >> threaded version? Is either one more stable or performant, etc? >> > > The MT of Cog is only for FFI as much as I understand. The VM itself > continues to be a green thread, even with CogMT. So no, there is not > performance change, only in FFI. > That being said, I never hear someone apart from Eliot successfully using > CogMT with real multithreaded FFI. There may be some work still to do before > you can use it. > I plan to change the VMs on Jenkins server to build using MT version of (co)interpreter. I misunderstood Eliot's statement once, when he said that MT version of VM is 5% slower, but then Eliot clarified that this slowdown related only to FFI, not the whole VM. -- Best regards, Igor Stasenko.

Oct. 22, 2011

Re: [Pharo-users] Goods db

by Norbert Hartl

Am 22.10.2011 um 10:42 schrieb Mariano Martinez Peck <marianopeck(a)gmail.com>: > > > On Sat, Oct 22, 2011 at 10:09 AM, Lukas Renggli <renggli(a)gmail.com> wrote: > I do not see how BTreePageOuter is used? Is that your own class? What > does that have to do with BTree? > > Generally it is a bad idea to subclass collections. I am not sure, but > it could be that GOODS optimizes OrderedCollection access (look for > class extension from GOODS in OrderedCollection and superclasses). > > Some other random remarks: > > - I am not aware that anybody has used GOODS in the past year on Pharo > or even on a Cog VM. So there might be (subtle) bugs. Do the tests > pass? > > - GOODS loads things lazily. So it might be that when you look at > things through reflection (like the inspector), they do not load > properly. Also you need to make sure not to not access your objects > with optimized messages like #== or #yourself, because these do not > trigger the loading of the object. > > > And even worst... ifNil: etc.. > http://joachimtuchel.wordpress.com/2011/03/25/glorp-va-smalltalk-proxies-an… > Exactly. Back then working with Glorp I learned it the hard way. And then I learned that Glorp provides a yourSelf message that can help. It is like yourself but yourSelf will make sure a proxy is resolved. Norbert > > Lukas > > On 22 October 2011 09:43, Jonathan Kelly <jonkelly(a)fastmail.fm> wrote: > > Hi, > > > > I thought I'd ask here first ... I got my BTree code working, so I thought > > I'd try to use it with the Goods DB, but it seems it's only storing and > > recovering the instance variables. My page class is > > > > OrderedCollection variableSubclass: #BTreePageOuter > > instanceVariableNames: 'order count' > > classVariableNames: '' > > poolDictionaries: '' > > category: 'BTree' > > > > db := KKDatabase onHost: 'localhost' port: 6543. > > db root: (BTree withOrder: 2). > > db root add: 'O1'. > > db commit. > > db logout. > > > > When I reconnect, instance variables order and count are set, but array > > (from the parent OrderedCollection) is nil. > > > > Jonathan. > > PS... squeaksource was down, so I downloaded the packages from the spanish > > mirror into my local package cache, and loaded them from there. I'm running > > 1.3 on COG (that came from the 1.2.1 single click). > > Package versions are: > > GOODS-cds.137.mcz > > GOODSCollections-cds.1.mcz > > GOODSPlatformSqueak-cds.6.mcz > > > > > > > > -- > Lukas Renggli > www.lukas-renggli.ch > > > > > -- > Mariano > http://marianopeck.wordpress.com >

Oct. 22, 2011

Re: [Pharo-users] Goods db

by Mariano Martinez Peck

On Sat, Oct 22, 2011 at 10:09 AM, Lukas Renggli <renggli(a)gmail.com> wrote: > I do not see how BTreePageOuter is used? Is that your own class? What > does that have to do with BTree? > > Generally it is a bad idea to subclass collections. I am not sure, but > it could be that GOODS optimizes OrderedCollection access (look for > class extension from GOODS in OrderedCollection and superclasses). > > Some other random remarks: > > - I am not aware that anybody has used GOODS in the past year on Pharo > or even on a Cog VM. So there might be (subtle) bugs. Do the tests > pass? > > - GOODS loads things lazily. So it might be that when you look at > things through reflection (like the inspector), they do not load > properly. Also you need to make sure not to not access your objects > with optimized messages like #== or #yourself, because these do not > trigger the loading of the object. > > And even worst... ifNil: etc.. http://joachimtuchel.wordpress.com/2011/03/25/glorp -va-smalltalk-proxies-and-isnil/ > Lukas > > On 22 October 2011 09:43, Jonathan Kelly <jonkelly(a)fastmail.fm> wrote: > > Hi, > > > > I thought I'd ask here first ... I got my BTree code working, so I > thought > > I'd try to use it with the Goods DB, but it seems it's only storing and > > recovering the instance variables. My page class is > > > > OrderedCollection variableSubclass: #BTreePageOuter > > instanceVariableNames: 'order count' > > classVariableNames: '' > > poolDictionaries: '' > > category: 'BTree' > > > > db := KKDatabase onHost: 'localhost' port: 6543. > > db root: (BTree withOrder: 2). > > db root add: 'O1'. > > db commit. > > db logout. > > > > When I reconnect, instance variables order and count are set, but array > > (from the parent OrderedCollection) is nil. > > > > Jonathan. > > PS... squeaksource was down, so I downloaded the packages from the > spanish > > mirror into my local package cache, and loaded them from there. I'm > running > > 1.3 on COG (that came from the 1.2.1 single click). > > Package versions are: > > GOODS-cds.137.mcz > > GOODSCollections-cds.1.mcz > > GOODSPlatformSqueak-cds.6.mcz > > > > > > > > -- > Lukas Renggli > www.lukas-renggli.ch > > -- Mariano http://marianopeck.wordpress.com

Oct. 22, 2011

Re: [Pharo-users] Goods db

by Lukas Renggli

I do not see how BTreePageOuter is used? Is that your own class? What does that have to do with BTree? Generally it is a bad idea to subclass collections. I am not sure, but it could be that GOODS optimizes OrderedCollection access (look for class extension from GOODS in OrderedCollection and superclasses). Some other random remarks: - I am not aware that anybody has used GOODS in the past year on Pharo or even on a Cog VM. So there might be (subtle) bugs. Do the tests pass? - GOODS loads things lazily. So it might be that when you look at things through reflection (like the inspector), they do not load properly. Also you need to make sure not to not access your objects with optimized messages like #== or #yourself, because these do not trigger the loading of the object. Lukas On 22 October 2011 09:43, Jonathan Kelly <jonkelly(a)fastmail.fm> wrote: > Hi, > > I thought I'd ask here first ... I got my BTree code working, so I thought > I'd try to use it with the Goods DB, but it seems it's only storing and > recovering the instance variables. My page class is > > OrderedCollection variableSubclass: #BTreePageOuter > Â Â instanceVariableNames: 'order count' > Â Â classVariableNames: '' > Â Â poolDictionaries: '' > Â Â category: 'BTree' > > db := KKDatabase onHost: 'localhost' port: 6543. > db root: (BTree withOrder: 2). > db root add: 'O1'. > db commit. > db logout. > > When I reconnect, instance variables order and count are set, but array > (from the parent OrderedCollection) is nil. > > Jonathan. > PS... squeaksource was down, so I downloaded the packages from the spanish > mirror into my local package cache, and loaded them from there. I'm running > 1.3 on COG (that came from the 1.2.1 single click). > Package versions are: > GOODS-cds.137.mcz > GOODSCollections-cds.1.mcz > GOODSPlatformSqueak-cds.6.mcz > > -- Lukas Renggli www.lukas-renggli.ch

Oct. 22, 2011

Goods db

by Jonathan Kelly

Hi, I thought I'd ask here first ... I got my BTree code working, so I thought I'd try to use it with the Goods DB, but it seems it's only storing and recovering the instance variables. My page class is OrderedCollection variableSubclass: #BTreePageOuter instanceVariableNames: 'order count' classVariableNames: '' poolDictionaries: '' category: 'BTree' db := KKDatabase onHost: 'localhost' port: 6543. db root: (BTree withOrder: 2). db root add: 'O1'. db commit. db logout. When I reconnect, instance variables order and count are set, but array (from the parent OrderedCollection) is nil. Jonathan. PS... squeaksource was down, so I downloaded the packages from the spanish mirror into my local package cache, and loaded them from there. I'm running 1.3 on COG (that came from the 1.2.1 single click). Package versions are: GOODS-cds.137.mcz GOODSCollections-cds.1.mcz GOODSPlatformSqueak-cds.6.mcz

Oct. 22, 2011

Re: [Pharo-users] Cog vs CogMT?

by Mariano Martinez Peck

On Fri, Oct 21, 2011 at 7:12 PM, Paul DeBruicker <pdebruic(a)gmail.com> wrote: > Hi - > > When should the multi-threaded version of Cog be used vs the single > threaded version? Is either one more stable or performant, etc? > > The MT of Cog is only for FFI as much as I understand. The VM itself continues to be a green thread, even with CogMT. So no, there is not performance change, only in FFI. That being said, I never hear someone apart from Eliot successfully using CogMT with real multithreaded FFI. There may be some work still to do before you can use it. > Thanks > > Paul > > -- Mariano http://marianopeck.wordpress.com

Oct. 21, 2011

Cog vs CogMT?

by Paul DeBruicker

Hi - When should the multi-threaded version of Cog be used vs the single threaded version? Is either one more stable or performant, etc? Thanks Paul

Oct. 21, 2011