![fileListPromise := [ self getFileList ] promise.
fileListPromise value.
…](https://image.slidesharecdn.com/03-leske-iwst2016-160901144947/75/a-promising-approach-for-debugging-remote-promises-7-2048.jpg?cb=1670716855)
![fileListPromise := [ self getFileList ] promise.
fileListPromise value.
…
copy process full copy
reify contexts](https://image.slidesharecdn.com/03-leske-iwst2016-160901144947/75/a-promising-approach-for-debugging-remote-promises-26-2048.jpg?cb=1670716855)
Shell Tips & Tricks
Your SlideShare is downloading.
×
Check these out next
![](http://img.youtube.com/vi/["jQQqsrfRgjo"]/1.jpg)
More Related Content
Slideshows for you (20)
Viewers also liked (16)
Similar to A promising approach for debugging remote promises (12)
More from ESUG (20)
Recently uploaded (20)
A promising approach for debugging remote promises
- 1. A PROMISING APPROACH TO DEBUGGING REMOTE PROMISES 2016 Max Leske Andrei Chiș Oscar Nierstrasz
- 2. DISCLAIMER
- 3. MOTIVATION
- 4. request file list display file list receive file list
- 5. request file list display file list receive file list
- 6. request file list PROMISE receive file list use use continue
- 7. fileListPromise := [ self getFileList ] promise. fileListPromise value. …
- 8. request file list what happened?
- 9. stack tracestack trace descriptiondescription NULLNULL what happened? exception object
- 10. IDEA
- 11. 1 sender receiver 1 Object Context CompiledMethod 1 method Process suspendedContext 1
- 12. sender nil sender Process suspendedContext
- 13. sender nil sender Process1 suspendedContext sender nil sender Process2 suspendedContext
- 14. sender Process1+2 suspendedContext sender sender sender sender nil
- 15. DEMO
- 16. MEMORY
- 17. object header: 64 bits 2 pinned / immutable slots 8 identity hash 22 format 5 class index 22 unused 2 garbage collection 3
- 18. object header extended header slot 0 slot 1 slot 2 … object
- 19. object header Context method closureOrNil stackp receiver sender pc 16 / 56 variable slots no extended header required 96 / 256 bytes per instance
- 20. ∑ ≪ 100 000 ~ 1000 small contexts: 96 kB large contexts: 256 kB * 2 (reification) small contexts: 192 kB large contexts: 512 kB estimated upper bounds
- 21. memory consumption of contexts:
- 22. object graph (simplified) garbage collector partially collected
- 23. garbage collector not collected copy
- 24. memory consumption of object graph: ?
- 25. PERFORMANCE
- 26. fileListPromise := [ self getFileList ] promise. fileListPromise value. … copy process full copy reify contexts
- 27. copying stack of 100 000 frames 0 MS 125 MS 250 MS 375 MS 500 MS SMALL CONTEXTS LARGE CONTEXTS SMALL CONTEXTS LARGE CONTEXTS with GC without GC
- 28. performance:
- 29. REMOTE COMMUNICATION
- 30. protocol? SeamlessSeamless
- 31. DEBUGGING serialised process local copy of process proxies
- 32. THREADS promises events asynchronous messages (actors) asynchronous network requests
- 33. request file list what happened? copy process full copy reify contexts Process1+2 suspendedContext sender nil sender sender sender sender
