Improved copying in VM_Memory
-----------------------------
Key: RVM-341
URL:
http://jira.codehaus.org/browse/RVM-341 Project: RVM
Issue Type: Improvement
Components: Runtime
Reporter: Ian Rogers
Fix For: 2.9.3
r13857 improved memory copying for Intel with SSE2 so that we used 64bit copies rather than 32bit copies. This gave a large number of speed ups:
http://jikesrvm.anu.edu.au/cattrack/results/rvmx86lnx32.anu.edu.au/perf/1790/performance_reportmost notably on SpecJBB 2000. There is a low-hanging fruit to improve this further, for example, by using 128bit copies and using more than 1 register to do the copying.
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