AMD Bulldozer "bdver1" Compiler Performance
Written by Michael Larabel in Software on 15 November 2011. Page 3 of 3. Add A Comment

GCC 4.6 and 4.7 had regressed with GraphicsMagick when setting the first-generation Bulldozer optimizations while the Open64 performance was not affected. However, when enabling the highest optimization level with bdver1, the regression was erased. In some cases, these maxed-out binaries were much faster.

The Bulldozer optimizations also caused the GCC-built binaries to regress for the Gcrypt benchmark while under Open64 they were running at the same speed. Setting "-Ofast" for Gcrypt caused broken binaries.

Next up are benchmarks from Open64 5.0 on Bulldozer.

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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter or contacted via

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