Edward Nevill created HADOOP-11660:
--------------------------------------
Summary: Add support for hardware crc on ARM aarch64 architecture
Key: HADOOP-11660
URL: https://issues.apache.org/jira/browse/HADOOP-11660
Project: Hadoop Common
Issue Type: Improvement
Components: native
Affects Versions: 3.0.0
Environment: ARM aarch64 development platform
Reporter: Edward Nevill
Assignee: Edward Nevill
Priority: Minor
Fix For: 3.0.0
This patch adds support for hardware crc for ARM's new 64 bit architecture
The patch is completely conditionalized on __aarch64__
I have only added support for the non pipelined version as I benchmarked the
pipelined version on aarch64 and it showed no performance improvement.
The aarch64 version supports both Castagnoli and Zlib CRCs as both of these are
supported on ARM aarch64 hardwre.
To benchmark this I modified the test_bulk_crc32 test to print out the time
taken to CRC a 1MB dataset 1000 times.
Before:
CRC 1048576 bytes @ 512 bytes per checksum X 1000 iterations = 2.55
CRC 1048576 bytes @ 512 bytes per checksum X 1000 iterations = 2.55
After:
CRC 1048576 bytes @ 512 bytes per checksum X 1000 iterations = 0.57
CRC 1048576 bytes @ 512 bytes per checksum X 1000 iterations = 0.57
So this represents a 5X performance improvement on raw CRC calculation.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
