Secrets of the Shenandoah Garbage Collector • Stephanie Crater • GOTO 2020

This presentation was recorded at GOTOpia Europe 2020. #GOTOcon #GOTOpia http://gotopia.eu Stephanie Crater - Java performance expert revolutionizing the garbage collector with Shenandoah ABSTRACT The Shenandoah garbage collector (GC) comes with the promise of pause times of less than 10ms. To achieve this, the collector performs the majority of its work concurrently, consequently impacting the throughput of the application. Work-stealing allows us to reduce the amount of time and resources spent on garbage collection by redistributing tasks among GC threads, reducing overall runtime. Stephanie's work with Shenandoah led her to re-examine the assumptions that inform current work-stealing algorithms [...] TIMECODES 00:00 Intro 00:49 Shenandoah GC overview 05:31 Goal 05:43 How does work-stealing work? 09:03 What else do we need? 10:14 What we might expect... 12:33 ...and what we got 13:18 What's going wrong/on in a GC? 15:35 How many workers should we use? 17:35 Work-stealing in JDK 11 21:01 Biases...not always bad? 23:39 Can we do even better? Read the full abstract here: https://gotopia.eu/2020/sessions/1482/secrets-of-the-shenandoah-garbage-collector https://twitter.com/GOTOcon https://www.linkedin.com/company/goto- https://www.facebook.com/GOTOConferences #Shenandoah #GarbageCollector #Java #JDK #ShenandoahGC #Programming #ShenandoahGarbageCollector Looking for a unique learning experience? Attend the next GOTO conference near you! Get your ticket at http://gotocon.com SUBSCRIBE TO OUR CHANNEL - new videos posted almost daily. https://www.youtube.com/user/GotoConferences/?sub_confirmation=1