[jdk16] RFR: 8259380: Correct pretouch chunk size to cap with actual page size [v3]

[Patrick Zhang]

On Mon, 11 Jan 2021 15:22:20 GMT, Patrick Zhang <qpzhang at openjdk.org> wrote:

>> src/hotspot/share/gc/shared/pretouchTask.cpp line 70:
>> 
>>> 68:   // large pages size if UseLargePages was set, otherwise processing chunks with
>>> 69:   // much smaller size inside large size pages would hurt performance.
>>> 70:   // Revising page_size should be placed after having decided the proper chuck_size.
>> 
>> Something like
>> 
>> `// Chunk size should be at least (unmodified) page size as using multiple threads pretouch on a single chunk can decrease performance.`
>> 
>> is sufficient here.
>
> Sure I will update this accordingly, thanks

Done

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PR: https://git.openjdk.java.net/jdk16/pull/97