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https://issues.apache.org/jira/browse/CASSANDRA-11519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15332667#comment-15332667
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Joshua McKenzie commented on CASSANDRA-11519:
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bq. The latest POWER8 processor, released two years ago, supports
hardware-based unaligned access for every combination of 32-bit/64-bit
integer/floating-point numbers.
bq. Actually, the linked document is quite old
Yep, that's on me - I should have spent a little more time and caught that.
It's pretty clear that one of the big selling points of POWER8 is the unaligned
access performance. Is there a way to differentiate POWER8 vs. older
architectures via os.arch and at least warn about the performance implications?
I don't know how widespread running C* on POWER is so I'd hate to put in a
change that would negatively impact some users out there.
> Add support for IBM POWER
> -------------------------
>
> Key: CASSANDRA-11519
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11519
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Environment: POWER architecture
> Reporter: Rei Odaira
> Assignee: Rei Odaira
> Priority: Minor
> Fix For: 2.1.x, 2.2.x, 3.0.x, 3.x
>
> Attachments: 11519-2.1.txt, 11519-3.0.txt
>
>
> Add support for the IBM POWER architecture (ppc, ppc64, and ppc64le) in
> org.apache.cassandra.utils.FastByteOperations,
> org.apache.cassandra.utils.memory.MemoryUtil, and
> org.apache.cassandra.io.util.Memory.
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