Date: Wed, 23 Oct 2024 10:38:12 -0400 From: gnn <gnn@freebsd.org> To: Arch <freebsd-arch@freebsd.org> Subject: Building kernels with FPU support? Message-ID: <E37A7972-7FBE-4428-81E1-8DC6D0F67726@freebsd.org>
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Howdy, I am wondering if anyone has tried, lately, to see what effect building w= ith FPU support has on overall system performance. I've been working wit= h a kernel module that needs this (for reasons I'll not go into now) and = it occurred to me that the perceived performance overhead that caused us = to only do fixed point in the kernel may no longer be significant. I not= e that Linux has an option to build their kernel with FPU support. And yes, I know that we have the ability to selectively deal with the FPU= , from the calls outlined in Section 9 for fpu, but I'm asking the more g= eneral question of "does it matter?" and "if so, how much?" Best, George
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