RFR(XL): 8185640: Thread-local handshakes

Doerr, Martin martin.doerr at sap.com
Fri Oct 27 14:47:13 UTC 2017

Hi Robbin,

excellent. I think this matches what Coleen had proposed, now.
Thanks for doing all the work with so many incremental patches and for responding on so many discussions. Seems to be a tough piece of work.

Best regards,

-----Original Message-----
From: Robbin Ehn [mailto:robbin.ehn at oracle.com] 
Sent: Freitag, 27. Oktober 2017 15:15
To: Erik Österlund <erik.osterlund at oracle.com>; Andrew Haley <aph at redhat.com>; Doerr, Martin <martin.doerr at sap.com>; Karen Kinnear <karen.kinnear at oracle.com>; Coleen Phillimore (coleen.phillimore at oracle.com) <coleen.phillimore at oracle.com>
Cc: hotspot-dev developers <hotspot-dev at openjdk.java.net>
Subject: Re: RFR(XL): 8185640: Thread-local handshakes

Hi all,

Poll in switches:

Poll in return:

Please take an extra look at poll in return.

Sanity tested, big test run still running (99% complete - OK).

Performance regression for the added polls increased to total of -0.68% vs 
global poll. (was -0.44%)

We are discussing the opt-out option, the newest suggestion is to make it 
diagnostic. Opinions?

For anyone applying these patches, the number 9 patch changes the option from 
product. I have not sent that out.

Thanks, Robbin

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