RFR(XS): 8231403: [ppc]: Align ReservedCodeCacheSize default value with other platforms

[Lindenmaier, Goetz]

Hi Lutz,

Thanks for making this change. 
This is a leftover of the initial contribution, and 
Should have been set to the values of the other paltforms
In first place.

Looks good.

Best regards,
  Goetz.

> -----Original Message-----
> From: hotspot-compiler-dev <hotspot-compiler-dev-
> bounces at openjdk.java.net> On Behalf Of Schmidt, Lutz
> Sent: Wednesday, September 25, 2019 11:40 AM
> To: 'hotspot-compiler-dev at openjdk.java.net' <hotspot-compiler-
> dev at openjdk.java.net>
> Subject: [CAUTION] RFR(XS): 8231403: [ppc]: Align ReservedCodeCacheSize
> default value with other platforms
> 
> Dear all,
> 
> may I please request reviews for this tine change, aligning default settings on
> PPC with the rest of the world? There is no reason why PPC would need a 5x
> larger CodeCacheSize. Comparing actual utilization with other architectures
> shows only little variation.
> 
> Bug:    https://bugs.openjdk.java.net/browse/JDK-8231403
> Webrev: https://cr.openjdk.java.net/~lucy/webrevs/8231403.00/
> 
> Test have been conducted SAP-internally only. Submit repo is of no help
> here because it is a PPC-only change.
> 
> Thanks,
> Lutz