[15] RFR 8245124: Shenandoah: optimize code root evacuation/update during concurrent class unloading

Aleksey Shipilev shade at redhat.com
Mon May 18 18:07:55 UTC 2020

On 5/18/20 8:03 PM, Zhengyu Gu wrote:
>>> Updated: http://cr.openjdk.java.net/~zgu/JDK-8245124/webrev.01/index.html
>> Good. Any reason why ShenandoahEvacOOMScope is not inside heal_nmethod_metadata()? Is there any
>> problem to call _bs->disarm(nm) when holding that scope?
> This is something I want to get rid of, especially on code root 
> unlinking path. Moving ShenandoahEvacOOMScope up is another noticeable 
> improvement, unfortunately, unload_nmethod_caches() triggers barrier.

Ah. So you want to batch entering/exiting the scope? Okay then.


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