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Comments and suggestions concerning this book should be mailed to gmourani@videotron.ca © Copyright 1999-2000 Gerhard Mourani and Open Network Architecture ® 65 · The “-fomit-frame-pointer” The “-fomit-frame-pointer” optimization option, one of the most interesting will allow to not keep the frame pointer in a register for functions that don't need one. This avoids the instructions to save, set up and restores frame pointers; it also makes an extra register available in many functions and makes debugging impossible on most machines. NOTE: All future optimization that we will describe in this book refer by default for a Pentium II/III CPU family. So, you must, if require adjust the compilation flag for your specific CPU processor type in the “/etc/profile” file and during your compilation time. Benchmark Results Summaries by Architecture Depending of your processor architecture and the version of your compiler (GCC/EGCS), optimization options may vary. The charts bellow will help you to choose the best compilation flags for your compiler/CPU architecture. Compiler version installed on your RedHat Linux 6.1 is egcs 2.91.66. But be sure to check it even so before choosing your compiler optimization options. · To verify the compiler version installed on your system, use the command: [root@deep /]# egcs --version egcs -2.91.66 NOTE: All benchmark results and future result can be retrieve from the GCC home page at the following address: http://egcs.cygnus.com/