MacChen01 created HADOOP-16601:
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             Summary: Add support for hardware crc32 of nativetask checksums on 
aarch64 arch
                 Key: HADOOP-16601
                 URL: https://issues.apache.org/jira/browse/HADOOP-16601
             Project: Hadoop Common
          Issue Type: Improvement
          Components: common
    Affects Versions: 3.2.1
            Reporter: MacChen01
             Fix For: site


Add support for aarch64 CRC instructions in nativetask module, optimize the 
CRC32 and CRC32C.

Use the benchmark tools : nttest , the improvement is quite substantial:
|ChecksumType|KeyValueType|IO|Before(M/s)|After(M/s)|Improvement|
|CRC32|TextType|Write|425.98|602.92|+42%|
|Read|796.06|1716.59|+116%|
|BytesType|Write|474.25|686.84|+45%|
|Read|844.96|1955.03|+131%|
|UnknownType|Write|434.84|608.81|+40%|
|Read|805.76|1733.82|+115%|
|CRC32C|TextType|Write|423.39|606.55|+43%|
|Read|799.20|1783.28|+123%|
|BytesType|Write|473.95|696.47|+47%|
|Read|846.30|2018.06|+138%|
|UnknownType|Write|434.07|612.31|+41%|
|Read|807.16|1783.95|+121%|



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