Can JIT be enabled on jdk-6?

[Lindenmaier, Goetz]

Hi Fernando,

I don't see any principal problems with getting the port into openjdk-6.

I would pick all changes of 'goetz' and 'simonis'  from
http://hg.openjdk.java.net/ppc-aix-port/jdk7u/hotspot/
and push them step by step to the new repo.
Or maybe better take the reviewed changes from 
http://hg.openjdk.java.net/ppc-aix-port/stage/hotspot/
which is a jdk8 repository.  These changes have a bugid and
are reviewed, so they are better to track.

But do you actually want to do this?  6 is old. And there are quite some open
issues with the ppc64le port in 8 and 9 , which could be fixed:

8073139: PPC64: User-visible arch directory and os.arch value on ppc64le cause issues with Java tooling
https://bugs.openjdk.java.net/browse/JDK-8073139
http://mail.openjdk.java.net/pipermail/hotspot-dev/2015-July/019415.html
I think this issue really should be resolved.

8139258: PPC64LE: argument passing problem when passing 15 floats in native call
https://bugs.openjdk.java.net/browse/JDK-8139258
http://mail.openjdk.java.net/pipermail/ppc-aix-port-dev/2015-July/002282.html

Also, a row of jtreg tests are failing with the serviceability agent on ppc/ppcle:
  serviceability/sa/jmap-hashcode/Test8028623.java                               
  serviceability/sa/TestStackTrace.java                                            
  gc/metaspace/CompressedClassSpaceSizeInJmapHeap.java                              
  serviceability/sa/TestClassLoaderStats.java                                        
The last two fail on ppc64le only.

Best regards,
  Goetz



-----Original Message-----
From: ppc-aix-port-dev [mailto:ppc-aix-port-dev-bounces at openjdk.java.net] On Behalf Of Fernando Seiti Furusato
Sent: Donnerstag, 8. Oktober 2015 16:19
To: ppc-aix-port-dev at openjdk.java.net
Cc: Breno Leitao
Subject: Can JIT be enabled on jdk-6?

Hello.

I work with porting on ppc64le and I am looking for some info regarding
enabling JIT on openjdk-6.
I am sure it is not a simple task, but I have to ask :)
If anyone could help me out with this I would appreciate.
These are the initial quetions I have:

1 - Is it possible to do a "backport" of what has been done on openjdk-7?
2 - How long do you think one would take to do that work of enabling JIT on 
openjdk-6, in case it is possible?

Thanks in advance.
-- 

Fernando Seiti Furusato
IBM Linux Technology Center