On 3/31/2016 10:26 PM, Andrew Rowley wrote:
Yes, the Java program used a little more than double the CPU of the
Assembler program reading 8GB of SMF data - but more than half was on
zIIP so there was actually less CP time. I need to do some tests to
work out how that varies with different quantities of data i.e. how
much is the startup of the JVM.
Have you experimented with –Xtune:virtualized ?
The chart on slide 27 of Iris Baron's presentation from SHARE in San
Antonio shows how much faster ramp up occurs with that option set, yet
ultimately the performance seems to fall short of what can be achieved
with organic ramp up.
https://share.confex.com/share/125/webprogram/Handout/Session17651/SHAREAug2015.Session17651.pdf
--
Edward E Jaffe
Phoenix Software International, Inc
831 Parkview Drive North
El Segundo, CA 90245
http://www.phoenixsoftware.com/
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