RFR (XS): 8220388: Increase -inlinehint-threshold for Clang to avoid G1 pause time regression

[Aleksey Shipilev]

On 3/9/19 3:46 AM, Man Cao wrote:
> Webrev: https://cr.openjdk.java.net/~manc/8220388/webrev.00/
> RFE: https://bugs.openjdk.java.net/browse/JDK-8220388

I just briefly looked into the webrev. I think the "usual" place to do these adjustments is
JvmOverrideFiles.gmk, on per-file basis. We did it for Shenandoah, and there are also plenty others:
  http://hg.openjdk.java.net/jdk/jdk/file/0324b3756aa2/make/hotspot/lib/JvmOverrideFiles.gmk#l39

Also note it makes sense for "release" builds only? In Shenandoah, we used to do this for all build
types, only to find that extended inlining blew up fastdebug binary sizes and the
compilation/linkage times.

-Aleksey

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