RE: iSeries JVM version

[michael@xxxxxxxxxxxxxxxxxx]

Version JVM V5R1M0 JDK 1.4.2.
Version JVM V5R2M0 JDK 1.4.2.

- Michael

> -------- Original Message --------
> Subject: RE: iSeries JVM version
> From: "Urbanek, Marty" <Marty_Urbanek@xxxxxxxxxxxx>
> Date: Mon, January 24, 2005 7:27 am
> To: java400-l@xxxxxxxxxxxx
> 
> Joe,
> 
> Please clarify: are you saying there is a multi-fold (8X) increase in 
> performance between the iSeries 1.4.1 and 1.4.2 JVM running on the same 
> machine?
> 
> Have you compared the total MHz available on the 840-2420 24-way versus the 
> 595 16-way? Could this be more a matter of increased CPU cycles to run the 
> JVM rather than JVM code? I recall someone on midrange-l stating that their 
> 4-way i5 whipped their 12-way 8xx. 24x600=14400. 16x1650=26400 (do we still 
> need to multiply by 2 for the Super-Hyper-Multi-Threaded POWER5? - even so it 
> would not account for 11X improvement)
> 
> Poll answer: we run JDK 1.3.1 and 1.4.2 on V5R2 and V5R3. The V5R2 box is 
> SF99169 level 19 and received JDK 1.4.2 as part of a PTF group some time ago, 
> although like Pete, I don't remember exactly which level. Our V5R3 box is at 
> SF99269 level 4. I think V5R3 JDK 1.4 was always 1.4.2 (from base OS/400 
> install).
> 
> FYI - the PTF group level numbers are just sequential numbers meaningful only 
> relative to each other, so 2 is newer than 1, 3 is newer than 2, etc. A 
> certain PTF group number is associated with a PTF group for a particular 
> OS/400 VRM, in this case, Java, SF99169 is for V5R2 and SF99269 is for V5R3. 
> They are cumulative, like an OS/400 cume but encompassing only a certain 
> subset of functionality, such as Java.
> 
> -Marty
> 
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