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Gil Tene CTO & co-founder, Azul Systems June 26, 2010 Azul Tech Talk Yandex, June 2010
Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Gil Tene CTO & co-founder, Azul Systems June 26, 2010 Memory Stagnation
Gil Tene CTO & co-founder, Azul Systems June 26, 2010 2GB: the new 640K
Memory. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Problem statement: Memory footprint has stagnated ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Why ~2GB? – It’s all about GC (and only GC) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Maybe 2GB is simply enough? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Will distributed solutions “solve” the problem? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
“ Tiny” application history 100KB apps on a ¼ to ½ MB Server 10MB apps on a 32 – 64 MB server 1GB apps on a 2 – 4 GB server ??? GB apps on 256 GB ,[object Object],[object Object],[object Object],1980 1990 2000 2010 100GB Zing VM
2GB is the new 640K This is getting embarrassing…. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Gil Tene CTO & co-founder, Azul Systems June 26, 2010 The Zing Platform Virtualization++ for Java
Java & Virtualization ,[object Object],[object Object],[object Object],[object Object],[object Object]
The Virtualization Tax ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Virtualization with Application benefits ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],If you want to:… Use Zing & Virtualization Use Zing & Virtualization Use Zing & virtualization Use Zing & virtualization Use Zing & virtualization Use Zing & virtualization Use Zing & virtualization Use Zing & virtualization
Java Virtualization New foundation for elastic, scalable Java deployments ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Azul Java Virtualization Liberating Java from the rigidities of the OS Java Virtualization Java App OS Layer x86 Server
Zing™ Platform Components Zing Virtual Appliances Elastic, Scalable Capacity Zing Virtual Machine Transparent Virtualization Zing Resource Controller Management and Monitoring Zing Vision Built-in App Profiling
Zing™ Platform Components Zing Virtual Appliances Elastic, Scalable Capacity Zing Virtual Machine Transparent Virtualization Zing Resource Controller Management and Monitoring Zing Vision Built-in App Profiling
Zing Elastic Deployments Virtualizing Java workloads in the Cloud Zing Resource Controller Plug-In Hypervisor Hypervisor Hypervisor Linux Windows ZVA App ZVA Apps ZVA App ZVA App Zing Virtual Appliance App ZVA Apps ZVA App ZVA App ZVA App Resources are utilized by the Zing virtual appliances, not the OSs
Virtues of the Zing Elastic Platform Making virtualization the best environment for Java ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Building on a Heritage of Elastic Runtimes Proven, vertically integrated execution stack ,[object Object],[object Object],Azul Vega™ 3 Compute Appliance Hardware Java Runtime OS Kernel Virtualization
Benefits of the Zing Elastic Platform ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Now you can: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Thank You
Gil Tene CTO, Azul Systems Performance Considerations in Concurrent Garbage Collected Systems
[object Object],[object Object],[object Object],[object Object]
What is a concurrent collector? A Concurrent Collector performs garbage collection work concurrently with the application’s own execution A Parallel Collector uses multiple CPUs to perform garbage collection
About the speaker Gil Tene (CTO), Azul Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Why use a concurrent collector? Why not stop-the-world? ,[object Object],[object Object],[object Object],[object Object],[object Object]
Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Why we really need concurrent collectors Software is unable to fill up hardware effectively ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What constitutes “failure” for a collector? It’s not just about correctness any more ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Concurrent collectors can be sensitive Go out of the smooth operating range, and you’ll pause ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Terminology Useful terms for discussing concurrent collection ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Metrics Useful metrics for discussing concurrent collection ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Cycle Time How long until we can have some more free memory? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Heap Population (Live Set) It’s not as simple as you might think… ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Mutation rate Does your program do any real work? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Object lifetime Objects are active in the Old Generation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Generational Assumption When you are forced to collect live young things ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Major things that happen in a pause The non-concurrent parts of “mostly concurrent” ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Fragmentation & Compaction You can’t delay it forever ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
More things that may happen in a pause More “mostly concurrent” secrets ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
HotSpot CMS Collector mechanism examples ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Azul GPGC Collector mechanism examples ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Measurement Recommendations When you are actually interested in the results… ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Don’t ignore “bad” GC Compaction? What Compaction?
Measurement Techniques Make reality happen ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Establish smooth operating range Know where it works, and know where it doesn’t… ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Summary Know where the cliff is, then stay away from the edge… ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Gil Tene CTO, Azul Systems Q & A Remember: Zing Announcement JavaOne Ticket drawing 13:45 @“Double” Conf. room
Gil Tene CTO, Azul Systems Thank You Performance Considerations in Concurrent Garbage Collected Systems

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Azul yandexjune010

  • 1. Gil Tene CTO & co-founder, Azul Systems June 26, 2010 Azul Tech Talk Yandex, June 2010
  • 2.
  • 3. Gil Tene CTO & co-founder, Azul Systems June 26, 2010 Memory Stagnation
  • 4. Gil Tene CTO & co-founder, Azul Systems June 26, 2010 2GB: the new 640K
  • 5.
  • 6.
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  • 12. Gil Tene CTO & co-founder, Azul Systems June 26, 2010 The Zing Platform Virtualization++ for Java
  • 13.
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  • 17. Azul Java Virtualization Liberating Java from the rigidities of the OS Java Virtualization Java App OS Layer x86 Server
  • 18. Zing™ Platform Components Zing Virtual Appliances Elastic, Scalable Capacity Zing Virtual Machine Transparent Virtualization Zing Resource Controller Management and Monitoring Zing Vision Built-in App Profiling
  • 19. Zing™ Platform Components Zing Virtual Appliances Elastic, Scalable Capacity Zing Virtual Machine Transparent Virtualization Zing Resource Controller Management and Monitoring Zing Vision Built-in App Profiling
  • 20. Zing Elastic Deployments Virtualizing Java workloads in the Cloud Zing Resource Controller Plug-In Hypervisor Hypervisor Hypervisor Linux Windows ZVA App ZVA Apps ZVA App ZVA App Zing Virtual Appliance App ZVA Apps ZVA App ZVA App ZVA App Resources are utilized by the Zing virtual appliances, not the OSs
  • 21.
  • 22.
  • 23.
  • 24.
  • 26. Gil Tene CTO, Azul Systems Performance Considerations in Concurrent Garbage Collected Systems
  • 27.
  • 28. What is a concurrent collector? A Concurrent Collector performs garbage collection work concurrently with the application’s own execution A Parallel Collector uses multiple CPUs to perform garbage collection
  • 29.
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  • 52.
  • 53. Don’t ignore “bad” GC Compaction? What Compaction?
  • 54.
  • 55.
  • 56.
  • 57. Gil Tene CTO, Azul Systems Q & A Remember: Zing Announcement JavaOne Ticket drawing 13:45 @“Double” Conf. room
  • 58. Gil Tene CTO, Azul Systems Thank You Performance Considerations in Concurrent Garbage Collected Systems

Editor's Notes

  1. © 2007 Azul Systems, Inc. | Confidential
  2. GIL: So here’s how we’re going to cover this talk: We’ll start with some background and definitions. We’ll then dive into inter-play between metrics, and what things are sensitive to. We’ll then discuss a couple of commercially available GC examples. And for the main takeways, we’ll share observations and recommendations about measuring GC and it’s effects.
  3. © 2007 Azul Systems, Inc. | Confidential
  4. © 2007 Azul Systems, Inc. | Confidential
  5. © 2007 Azul Systems, Inc. | Confidential
  6. © 2008 Azul Systems, Inc.
  7. © 2008 Azul Systems, Inc.
  8. © 2007 Azul Systems, Inc. | Confidential
  9. © 2007 Azul Systems, Inc. | Confidential
  10. © 2007 Azul Systems, Inc. | Confidential
  11. © 2007 Azul Systems, Inc. | Confidential