![Page 1: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/1.jpg)
1 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
Chair for Programming Paradigms, Karlsruhe Institute of Technology (KIT) & System Software Group, University Erlangen-Nuremberg (FAU)
Cutting Out the Middleman: OS-Level Support for X10Activities
Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt,Benjamin Oechslein, Jens Schedel, Daniel Lohmann
KIT – University of the State of Baden-Wuerttemberg andNational Research Center of the Helmholtz Association www.kit.edu
![Page 2: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/2.jpg)
Ideal World
2 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
OS
HW
![Page 3: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/3.jpg)
Ideal World
2 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
OS
HW
![Page 4: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/4.jpg)
Ideal World
2 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
OS
HW
![Page 5: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/5.jpg)
Current Practice
3 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
RT
OS
HW
![Page 6: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/6.jpg)
Current Practice
3 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
RT
OS
HW
![Page 7: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/7.jpg)
Current Practice
3 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
RT
OS
HW
![Page 8: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/8.jpg)
Current Practice
3 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
RT
OS
HW
sleep(100)
![Page 9: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/9.jpg)
Current Practice
3 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
RT
OS
HW
sleep(100)
![Page 10: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/10.jpg)
Workaround
4 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
class Runtime {
public static def sleep(millis:Long) {
Runtime.increaseParallelism ();
Thread.sleep(millis );
Runtime.decreaseParallelism (1);
}
}
![Page 11: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/11.jpg)
Workaround in Action
5 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
RT
OS
HW
![Page 12: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/12.jpg)
Workaround in Action
5 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
RT
OS
sleep(100)
HW
![Page 13: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/13.jpg)
Workaround in Action
5 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
RT
OS
sleep(100)
HW
![Page 14: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/14.jpg)
Workaround in Action
5 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
RT
OS
sleep(100)
HW
![Page 15: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/15.jpg)
Workaround in Action
5 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
RT
OS
sleep(100)
HW
![Page 16: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/16.jpg)
Motivation
6 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
Problems with user-level scheduling approach:Complexity: interplay between two schedulersPerformance: starting/stopping kernel-level threads is expensiveBugs: what if starting/stopping is forgotten? (e.g., user code)
⇒ Why not activity = OS-level primitive?
In this talk:How we directly mapped activities to OS primitives
Context: many-core hardware architecture
How this simplifies runtime system and OSInitial evaluation of system efficiency
![Page 17: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/17.jpg)
Motivation
6 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
Problems with user-level scheduling approach:Complexity: interplay between two schedulersPerformance: starting/stopping kernel-level threads is expensiveBugs: what if starting/stopping is forgotten? (e.g., user code)
⇒ Why not activity = OS-level primitive?
In this talk:How we directly mapped activities to OS primitives
Context: many-core hardware architecture
How this simplifies runtime system and OSInitial evaluation of system efficiency
![Page 18: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/18.jpg)
Motivation
6 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
Problems with user-level scheduling approach:Complexity: interplay between two schedulersPerformance: starting/stopping kernel-level threads is expensiveBugs: what if starting/stopping is forgotten? (e.g., user code)
⇒ Why not activity = OS-level primitive?
In this talk:How we directly mapped activities to OS primitives
Context: many-core hardware architecture
How this simplifies runtime system and OSInitial evaluation of system efficiency
![Page 19: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/19.jpg)
Tiled Many-Core Architectures
7 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
Core Core Core Core
Memory Cache 10
Core Core Core Core
Memory Cache 11
Core Core Core Core
Memory Cache 00
Core Core Core Core
Memory Cache 01
![Page 20: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/20.jpg)
Tiled Many-Core Architectures
7 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
Core Core Core Core
Memory Cache 10
Core Core Core Core
Memory Cache 11
Core Core Core Core
Memory Cache 00
Core Core Core Core
Memory Cache 01
![Page 21: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/21.jpg)
OctoPOS
8 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
OS designed for many-core PGAS architectures
Many-Core⇒ Enough cores for exclusive
allocation⇒ Cooperative scheduling instead
of preemption
PGAS Architecture⇒ One OS instance per place⇒ Message passing
User-level-like scheduler in the kernelCooperative FIFO scheduling
⇒ Very lightweight threads called i-lets
![Page 22: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/22.jpg)
OctoPOS
8 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
OS designed for many-core PGAS architectures
Many-Core⇒ Enough cores for exclusive
allocation⇒ Cooperative scheduling instead
of preemption
PGAS Architecture⇒ One OS instance per place⇒ Message passing
User-level-like scheduler in the kernelCooperative FIFO scheduling
⇒ Very lightweight threads called i-lets
![Page 23: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/23.jpg)
OctoPOS
8 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
OS designed for many-core PGAS architectures
Many-Core⇒ Enough cores for exclusive
allocation⇒ Cooperative scheduling instead
of preemption
PGAS Architecture⇒ One OS instance per place⇒ Message passing
User-level-like scheduler in the kernelCooperative FIFO scheduling
⇒ Very lightweight threads called i-lets
![Page 24: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/24.jpg)
OctoPOS
8 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
OS designed for many-core PGAS architectures
Many-Core⇒ Enough cores for exclusive
allocation⇒ Cooperative scheduling instead
of preemption
PGAS Architecture⇒ One OS instance per place⇒ Message passing
User-level-like scheduler in the kernelCooperative FIFO scheduling
⇒ Very lightweight threads called i-lets
![Page 25: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/25.jpg)
OctoPOS
8 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
OS designed for many-core PGAS architectures
Many-Core⇒ Enough cores for exclusive
allocation⇒ Cooperative scheduling instead
of preemption
PGAS Architecture⇒ One OS instance per place⇒ Message passing
User-level-like scheduler in the kernelCooperative FIFO scheduling
⇒ Very lightweight threads called i-lets
![Page 26: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/26.jpg)
Async
9 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
RT
OS
HW
Each activity corresponds to exactly one i-letVery thin runtime system, no user-level schedulerBlocking calls unproblematic, no workaround needed
![Page 27: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/27.jpg)
Async
9 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
RT
OS
HW
Each activity corresponds to exactly one i-letVery thin runtime system, no user-level schedulerBlocking calls unproblematic, no workaround needed
![Page 28: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/28.jpg)
Async
9 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
X10
RT
OS
HW
Each activity corresponds to exactly one i-letVery thin runtime system, no user-level schedulerBlocking calls unproblematic, no workaround needed
![Page 29: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/29.jpg)
Remote i-let spawning
10 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
spawn_ilet(place_id, ilet)
Start an i-let on a different placeAsynchronous
![Page 30: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/30.jpg)
Small At Async Statement: at (B) async S
11 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let B
exec S
![Page 31: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/31.jpg)
Small At Async Statement: at (B) async S
11 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let B
exec S
![Page 32: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/32.jpg)
Small At Async Statement: at (B) async S
11 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let B
exec S
![Page 33: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/33.jpg)
Small At Async Statement: at (B) async S
11 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let B
exec S
global termination
![Page 34: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/34.jpg)
Push DMA Transfer
12 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
push_dma(place_id, data, length, sender_ilet, receiver_ilet)
Copy memory block to different placeSpecify actions to be executed when transfer is finishedAsynchronous, HW support
![Page 35: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/35.jpg)
At Async Statement: at (B) async S
13 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
exec S
![Page 36: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/36.jpg)
At Async Statement: at (B) async S
13 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
exec S
![Page 37: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/37.jpg)
At Async Statement: at (B) async S
13 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
exec S
![Page 38: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/38.jpg)
At Async Statement: at (B) async S
13 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
exec S
![Page 39: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/39.jpg)
At Async Statement: at (B) async S
13 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
exec S
![Page 40: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/40.jpg)
At Async Statement: at (B) async S
13 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
exec S
![Page 41: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/41.jpg)
At Async Statement: at (B) async S
13 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
exec S
global termination
![Page 42: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/42.jpg)
Evaluation
14 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
Benchmarks on FPGA-based prototype hardware4 places with 4 cores each25 MHz
Measurements (in clock cyles):
spawn_ilet(0, ilet) async { }
539 1469
spawn_ilet(1, ilet) at (Place(1)) async { }
1133 1981
Operations are cheap (in absolute numbers)
![Page 43: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/43.jpg)
Evaluation
14 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
Benchmarks on FPGA-based prototype hardware4 places with 4 cores each25 MHz
Measurements (in clock cyles):
spawn_ilet(0, ilet) async { }
539 1469
spawn_ilet(1, ilet) at (Place(1)) async { }
1133 1981
Operations are cheap (in absolute numbers)
![Page 44: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/44.jpg)
Evaluation
14 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
Benchmarks on FPGA-based prototype hardware4 places with 4 cores each25 MHz
Measurements (in clock cyles):
spawn_ilet(0, ilet) async { }
539 1469
spawn_ilet(1, ilet) at (Place(1)) async { }
1133 1981
Operations are cheap (in absolute numbers)
![Page 45: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/45.jpg)
Evaluation
14 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
Benchmarks on FPGA-based prototype hardware4 places with 4 cores each25 MHz
Measurements (in clock cyles):
spawn_ilet(0, ilet) async { }
539 1469
spawn_ilet(1, ilet) at (Place(1)) async { }
1133 1981
Operations are cheap (in absolute numbers)
![Page 46: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/46.jpg)
Conclusion & Future Work
15 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
We have:Implemented X10 activity management without a user-level scheduler
Possible by exclusively allocating cores and using cooperative schedulingEssentially puts user-level-like scheduler into kernel
Adapted the X10 runtimeEvaluated the efficiency on a prototype many-core architecture
We plan to:Port OctoPOS to AMD64 NUMA systems (in progress)Evaluate against common Linux-MPI implementations
![Page 47: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/47.jpg)
Conclusion & Future Work
15 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
We have:Implemented X10 activity management without a user-level scheduler
Possible by exclusively allocating cores and using cooperative schedulingEssentially puts user-level-like scheduler into kernel
Adapted the X10 runtimeEvaluated the efficiency on a prototype many-core architecture
We plan to:Port OctoPOS to AMD64 NUMA systems (in progress)Evaluate against common Linux-MPI implementations
![Page 48: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/48.jpg)
16 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
Backup Slides
![Page 49: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/49.jpg)
At Expression: at (B) E
17 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
exec at
body
![Page 50: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/50.jpg)
At Expression: at (B) E
17 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
exec at
body
![Page 51: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/51.jpg)
At Expression: at (B) E
17 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
blocksuntil loc.term.
exec at
body
![Page 52: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/52.jpg)
At Expression: at (B) E
17 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
blocksuntil loc.term.
exec at
body
![Page 53: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/53.jpg)
At Expression: at (B) E
17 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
blocksuntil loc.term.
exec at
body
![Page 54: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/54.jpg)
At Expression: at (B) E
17 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
blocksuntil loc.term.
exec at
body
![Page 55: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/55.jpg)
At Expression: at (B) E
17 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
blocksuntil loc.term.
exec at
body
![Page 56: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/56.jpg)
At Expression: at (B) E
17 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
blocksuntil loc.term.
exec at
body
![Page 57: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/57.jpg)
At Expression: at (B) E
17 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
blocksuntil loc.term.
exec at
body
![Page 58: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/58.jpg)
At Expression: at (B) E
17 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
blocksuntil loc.term.
exec at
body
![Page 59: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/59.jpg)
At Expression: at (B) E
17 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
blocksuntil loc.term.
exec at
body
loc.term.
![Page 60: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/60.jpg)
At Expression: at (B) E
17 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
blocksuntil loc.term.
exec at
body
loc.term.
![Page 61: Cutting Out the Middleman: OS-Level Support for X10 Activitiesx10.sourceforge.net/documentation/papers/X10Workshop2015/slides/mohr.pdf · 1 June 14, 2015 Manuel Mohr, Sebastian Buchwald,](https://reader033.vdocument.in/reader033/viewer/2022041800/5e511bd6665e7302f32b7b49/html5/thumbnails/61.jpg)
At Expression: at (B) E
17 June 14, 2015 Manuel Mohr, Sebastian Buchwald, Andreas Zwinkau, Christoph Erhardt, Benjamin Oechslein,Jens Schedel, Daniel Lohmann – Cutting Out the Middleman: OS-Level Support for X10 Activities
IPD, CS4
KIT
i-let A DMA B
blocksuntil loc.term.
exec at
body
loc.term.
glob. term.