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JavaOne 2017 - Mark Stoodley - Open Sourcing IBM J9 JVM
- 2. Important disclaimers • THE INFORMATION CONTAINED IN THIS PRESENTATION IS PROVIDED FOR INFORMATIONAL PURPOSES ONLY. • WHILST EFFORTS WERE MADE TO VERIFY THE COMPLETENESS AND ACCURACY OF THE INFORMATION CONTAINED IN THIS PRESENTATION, IT IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. • ALL PERFORMANCE DATA INCLUDED IN THIS PRESENTATION HAVE BEEN GATHERED IN A CONTROLLED ENVIRONMENT. YOUR OWN TEST RESULTS MAY VARY BASED ON HARDWARE, SOFTWARE OR INFRASTRUCTURE DIFFERENCES. • ALL DATA INCLUDED IN THIS PRESENTATION ARE MEANT TO BE USED ONLY AS A GUIDE. • IN ADDITION, THE INFORMATION CONTAINED IN THIS PRESENTATION IS BASED ON IBM’S CURRENT PRODUCT PLANS AND STRATEGY, WHICH ARE SUBJECT TO CHANGE BY IBM, WITHOUT NOTICE. • IBM AND ITS AFFILIATED COMPANIES SHALL NOT BE RESPONSIBLE FOR ANY DAMAGES ARISING OUT OF THE USE OF, OR OTHERWISE RELATED TO, THIS PRESENTATION OR ANY OTHER DOCUMENTATION. • NOTHING CONTAINED IN THIS PRESENTATION IS INTENDED TO, OR SHALL HAVE THE EFFECT OF: • CREATING ANY WARRANT OR REPRESENTATION FROM IBM, ITS AFFILIATED COMPANIES OR ITS OR THEIR SUPPLIERS AND/OR LICENSORS 2 2
- 4. This presentation: • Why open source the J9 JVM? • How do OpenJDK and OpenJ9 fit together? • Performance of OpenJDK with OpenJ9 • License • How can you learn more / get involved 4
- 9. Proprietary J9 JVM cannot reach developers! 9 Cognitive Analytics Cloud Business Insights App Platform Microsoft® Windows® J9 JVMConsistent Java Platform Experience Exploit platform features X
- 35. Some integration code for OpenJ9 OpenJDK9 HotSpot • Not much integration code (4K lines compared to millions in OpenJDK) • Makefiles, configuration, some JCL, other stuff • Not really where the innovation happens • Plan to keep as minimal as possible 35
- 42. Evaluate with 4 conflicting metrics 1. Start-up: time until app server is ready to accept load • Part of deployment time, restart time, productivity: compile-edit-debug cycle 2. Resident memory footprint after start-up, before load applied • In cloud, memory means $$, not all servers are immediately employed 3. Resident memory footprint every few seconds while load applied 30 minutes 4. Throughput performance every few seconds while load applied 30 minutes • Conflicting? • improving throughput usually increases footprint and/or start-up and vice versa 42
- 43. 43 Smaller is better 0.0 0.2 0.4 0.6 0.8 1.0 1.2 OpenJDK9 with HotSpot OpenJDK9 with OpenJ9 OpenJDK9 with OpenJ9 (- Xshareclasses -Xsc60m - Xscaotmax=8m) Normalized start-up time DayTrader3 Start-up Time (all runs with -Xmx1g) +6% -35% (default OpenLiberty options)
- 45. 45 Smaller is better 0 200 400 600 800 1000 1200 1400 1600 1800 JVM process Resident Set Size Time (sec) DayTrader3 Footprint Ramp-up (all runs with -Xmx1g) OpenJDK9 with HotSpot OpenJDK9 with OpenJ9 OpenJDK9 with OpenJ9 (-Xshareclasses -Xsc60m -Xscaotmax=8m) 1.8X smaller
- 46. 46 Higher is better 0 200 400 600 800 1000 1200 1400 1600 1800 Throughput Time (sec) DayTrader3 Throughput Ramp-up (all runs with -Xmx1g) OpenJDK9 with Hotspot OpenJDK9 with OpenJ9 OpenJDK9 with OpenJ9 (-Xshareclasses -Xsc60m -Xscaotmax=8m) Reaches peak 7 minutes earlier
- 47. Daytrader3 Performance Summary • OpenJDK9 with OpenJ9 using –Xshareclasses (default OpenLiberty options): • Starts 35% quicker • Consumes 2.6X less memory after start-up before applying load • Consumes 1.8X less memory after 30 minutes of load • Achieved comparable throughput performance 7 minutes earlier • Conclusion from this benchmark: • Half the cost running OpenJDK9 with OpenJ9, or twice the work for the same cost • Deploy and recover JVMs 35% faster using OpenJDK9 with OpenJ9 • For more details or to try it yourself, see: • https://github.com/eclipse/openj9-website/blob/master/benchmark/daytrader3.md47
- 51. Wrap-up: Want to get involved? • Download OpenJDK with OpenJ9 and try it out! • https://adoptopenjdk.net/nightly.html?variant=openjdk9-openj9 • Run on your favourite Java application and let us know how it went! • Interact with our community via Github issues • https://github.com/eclipse/openj9 • Ask questions, report problems, report Amazing Results • Download the code, build it yourself, play around! • Submit pull requests, see them tested on multiple platforms in the open • Whatever you think will make Eclipse OpenJ9 better, we’d love to hear it51
- 52. Learn more at Java One! • Deeper dive into how OpenJ9 works with Dan Heidinga OpenJ9: Under the Hood of the Next Open Source JVM [CON3573] Tuesday, Oct 03, 3:00 p.m. - 3:45 p.m. | Moscone West - Room 2004 • Have even more questions? Dan Heidinga, Mark Stoodley, John Duimovich Ask the OpenJ9 Architects [CON2672] Wednesday, Oct 04, 8:30 a.m. - 9:15 a.m. | Moscone West - Room 2011 • Learn about microservices for open testing with Shelley Lambert Cloud-Based Test Microservices [CON2789] Thursday, Oct 05, 11:45 a.m. - 12:30 p.m. | Marriott Marquis (Yerba Buena Level) - Salon 12 • Debugging runtimes with Dan Heidinga for Bjørn Vårdal Secrets of Building a Debuggable Runtime [CON4081] Thursday, Oct 05, 12:45 p.m. - 1:30 p.m. | Marriott Marquis (Yerba Buena Level) - Salon 15 • Visit the Eclipse Foundation booth (6140) Dan Heidinga and Mark Stoodley today from 4:00 - 5:45 Mark Stoodley on Wednesday from 2:30 - 4:30 52