On 14/10/2016 9:10 PM, Kirk Wolf wrote:
JZOS does have native code (not byte code) that is part of the JVM which is
zIIP eligible.
Right. So the JNI C/C++ RTL functions run on a zIIP but as I thought
DFSORT running in a spawned process does not. DFSORT could have been
executed with a simple link
to the program so I'm guessing that spawning a process was a design
feature so it wouldn't run on a zIIP?
The JZOS DFSORT wrapper spawns DFSORT in a separate process, which is not
part of the JVM and is therefore not zIIP eligible.
Kirk Wolf
Dovetailed Technologies
http://dovetail.com
On Fri, Oct 14, 2016 at 7:54 AM, Martin Packer <[email protected]>
wrote:
DFSORT is not executing as bytecode in a JVM so no.
Martin Packer,
zChampion, Principal Systems Investigator,
Worldwide Cloud & Systems Performance, IBM
+44-7802-245-584
email: [email protected]
Twitter / Facebook IDs: MartinPacker
Blog:
https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker
Podcast Series (With Marna Walle): https://developer.ibm.com/tv/mpt/ or
https://itunes.apple.com/gb/podcast/mainframe-performance-
topics/id1127943573?mt=2
From: David Crayford <[email protected]>
To: [email protected]
Date: 14/10/2016 13:49
Subject: Does JZOS DFSORT get offloaded to a zIIP?
Sent by: IBM Mainframe Discussion List <[email protected]>
I'm guessing the answer is no judging by the fact that JZOS spawns a
jdfsort UNIX process to do the sort and if it did everybody would just
write Java wrappers to
sort data sets thus reducing the cost of running DFSORT.
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