<div>On 10/18/06, Gianluca Cecchi <<a href="mailto:gianluca.cecchi@gmail.com">gianluca.cecchi@gmail.com</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> hello, I would like to post a generic question and a specific one. 1) I noticed that in EL kernels and also in fedora ones, the cpu optimization selection in .config is generic CONFIG_M686 (that should be PPro if I'm not wrong). Instead, in huge kernels there is CONFIG_MPENTIUMIII set, I think because it was the first with PAE capability perhaps? Would one benefit getting the kernel.src.rpm package and compiling with set up based on his own traget processor? For example CONFIG_MPENTIUM4? I think after PPro many microarchitecture changes has come... Any drawbacks or possible incompatibility with the rest of the system? 2) If the answer to 1) it's worth while, what kind of optimizations could I get for Core2 duo processor based systems, or in the future for woodcrest? It seems to me that, simply said, core2 duo takes the best from PIII and PXeon features, so if you select one of the two you however probably miss something.... Does the gcc version provided with fedora support optimizations for these new processors? And in case are these mapped in kernel capabilities then? Does it make sense to consider intel compiler to compile kernel, as for example it supports on Linux the switches -xT or –axT for Merom/Conroe/Woodcrest processors? Otherwise how could we get all the features provided by these new cpus? thanks in advance. Gianluca -- fedora-test-list mailing list <a href="mailto:fedora-test-list@redhat.com">fedora-test-list@redhat.com</a> To unsubscribe: <a href="https://www.redhat.com/mailman/listinfo/fedora-test-list">https://www.redhat.com/mailman/listinfo/fedora-test-list </a></blockquote><div> Not sure if you will see much of a gain, however if you have a Core 2 duo, I would be running x86_64..... ;) $ cat /proc/cpuinfo |grep "model name" model name : Intel(R) Core(TM)2 CPU T7200 @ 2.00GHz model name : Intel(R) Core(TM)2 CPU T7200 @ 2.00GHz $ uname -m x86_64 $ uname -r 2.6.18-1.2798.fc6 </div> </div>