Changeset 1038


Ignore:
Timestamp:
Mar 25, 2011, 8:20:15 PM (8 years ago)
Author:
cameron
Message:

Section 7 cleanups

Location:
docs/PACT2011
Files:
2 edited

Legend:

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Added
Removed
  • docs/PACT2011/07-avx.tex

    r1029 r1038  
    107107form seem to fully translate to performance benefits. 
    108108Based on the reduction of overall Bitwise-SIMD instructions we expected a 11\% improvement in performance.
    109 Instead, perhaps bizzarely the performance of Parabix2 in the 256-bit AVX implementation
     109Instead, perhaps bizzarely, the performance of Parabix2 in the 256-bit AVX implementation
    110110does not improve significantly and actually degrades for files with
    111 higher markup density (average 10\%). Dew.xml, on which Bitwise-SIMD instructions reduced by 39\%, we saw a performance improvement of 8\%.
     111higher markup density (average 10\%). Dewiki.xml, on which bitwise-SIMD instructions reduced by 39\%, saw a performance improvement of 8\%.
    112112We believe that this is primarily due to the intricacies of the first generation AVX implemention in Sandy Bridge,
    113113with significant latency in many of the 256-bit instructions in comparison to their
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