Software Development on Quest

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Stuck? Need help? quest-help@northwestern.edu Useful compiler options on Quest GNU Intel Description -msse4.2 -mSSE4.2 Tells the compiler to generate code specialized for Intel Nehalem • SSE=Streaming SIMD Extension • SSE instructions pipeline and simultaneously execute independent operations to get multiple operations per clock cycle • Directs the compiler to use the most advanced instruction set available for the target architecture.
Stuck? Need help? quest-help@northwestern.edu -fast (Intel only) • GNU: partially included in -03 • Intel: -O3 -ipo -static -xHOST -no-prec-div o no-prec-div: change floating point division into multiplication. (A/B = A*(1/B)) o xHOST: generate binaries which are optimized for specific architecture. o ipo: enables multifile inlining, constant propagation, code placement (i.e. function layout), dead code elimination and data placement. Needs to be provided while compiling and linking.
Page 1 and 2: Stuck? Need help? quest-help@northw
Page 11 and 12: Ideal for large codes, with many br
Page 13: Best for codes which are floating p
Page 17 and 18: program MAIN integer::ndim=2,niter=
Page 21 and 22: Step 1 Compile with PGO Stuck? Need
Page 25: Stuck? Need help? quest-help@northw

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