Software Development on Quest

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Stuck? Need help? quest-help@northwestern.edu Source files Interprocedural optimization Compile with ipo .o files with IL information Link with ipo The interprocedural optimization process • What you should know about IPO: It extends compilation time and memory usage. –ip-no-inlining disables inlining. Executable
Stuck? Need help? quest-help@northwestern.edu Profile guided optimization • Improves instruction cache usage o Moves frequently accessed code segments adjacent to one another, moves seldom accessed code to the end of the module shrinking code size, eliminating branches. • Increases application performance by improving branch prediction. • Applications suited to PGO o Applications containing several functions which are executed frequently. • Uses the profile guided feedback from a test run using data sets, which represents a typical application pattern.
Page 1 and 2: Stuck? Need help? quest-help@northw
Page 11 and 12: Ideal for large codes, with many br
Page 13 and 14: Best for codes which are floating p
Page 17: 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

Software Development on Quest

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