SA.NEXT - SA feedback needed (original) (raw)

Krystal Mok rednaxelafx at gmail.com
Fri Feb 7 18:34:49 PST 2014

Hi Coleen,

Comments inline:

On Fri, Feb 7, 2014 at 2:53 PM, Coleen Phillimore < coleen.phillimore at oracle.com> wrote:

On 1/31/14 9:19 AM, Dmitry Samersoff wrote:

1. How often do you use SA? I tried once, but I think it was broken. Was that CLHSDB you tried? There could be cases where you've used SA under the hood of some j-* tools, e.g. jstack -F/-m or on core dump, jmap -heap/-F or on core dump, etc.

And yeah, SA can be broken from time to time...for the exact reason you mentioned below.

I've said before that I believe the SA should be discontinued unless the problem of duplicated hotspot code in it can be resolved. We are in the process of changing many things in the code and the tax of a duplicate implementation in Java is too high. Find a way to use the libjvm.so or a libjvmsa.so to retrieve hotspot internals.

Without a way to mechanically generate all the mirroring data structures, I'd concur on this point. But do please come up with a viable alternative before discontinuing SA.

Coleen

-Dmitry

More information about the hotspot-dev mailing list