RFR(XXS) 8187629: NMT: Memory miscounting in compiler (C2)

[Andrew Dinn]

On 19/09/17 17:14, Vladimir Kozlov wrote:
> Compilers also use a lot thread local ResourceArea -
> Thread::current()->resource_area() and NEW_RESOURCE_ARRAY() macro.
> But thread local area is defined as mtThread:
> 
> http://hg.openjdk.java.net/jdk10/hs/hotspot/file/5ab7a67bc155/src/share/vm/runtime/thread.cpp#l218
True, although that's arguably part of the fixed cost of creating a thread.

By contrast, the changes Zhengyu has made are for data areas
specifically allocated during a compilation to allow that compile to
proceed.

I don't know for sure which way to sway on that first count. The second
one definitely needs debiting against the compiler account.

regards,


Andrew Dinn
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