Proposal: JDK-8217896: Make better use of LCPUs when building on AIX

[David Holmes]

On 30/01/2019 3:05 am, Erik Joelsson wrote:
> Hello,
> 
> I'm OK with this, but since I can't verify it at all, I would be more 
> comfortable if one of the other AIX users would review this as well.

Ditto. I did some googling on this and pmcycles is flagged as maybe 
being deprecated in the future and may require privileges to execute. 
lparstat -i seems to be more commonly used.

David
-----

> /Erik
> 
> On 2019-01-29 05:08, Andrew Leonard wrote:
>> Hi,
>> Please can I get a sponsor for this build performance enhancement on AIX,
>> by better determining the number of LCPUs on smt AIX machines:
>>      https://cr.openjdk.java.net/~aleonard/8217896/webrev.00/
>> My testing shows up to 30% improved build times when leveraging the
>> available LCPUs.
>> Many thanks
>> Andrew
>>
>> Andrew Leonard
>> Java Runtimes Development
>> IBM Hursley
>> IBM United Kingdom Ltd
>> Phone internal: 245913, external: 01962 815913
>> internet email: andrew_m_leonard at uk.ibm.com
>>
>>
>> Unless stated otherwise above:
>> IBM United Kingdom Limited - Registered in England and Wales with number
>> 741598.
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>> 3AU