On Mon, Jan 08, 2018 at 08:44:04PM -0600, R0b0t1 wrote > I was under the impression that disabling SMP on single core systems > could lead to a performance increase, but wasn't necessary.
Quote from the "Help" in "make menuconfig" from the CONFIG_SMP item: ==================================================================== This enables support for systems with more than one CPU. If you have a system with only one CPU, say N. If you have a system with more than one CPU, say Y. If you say N here, the kernel will run on uni- and multiprocessor machines, but will use only one CPU of a multiprocessor machine. If you say Y here, the kernel will run on many, but not all, uniprocessor machines. On a uniprocessor machine, the kernel will run faster if you say N here. ==================================================================== > Is the deciding factor actually processor family? And - there are GCC > versions or distributions that have already dropped support for x86_64 > processors? I'd only read about 32 bit families being dropped. I think you're misunderstanding me. This is not about dropping x86_64 support. Rather, the earliest "Athlon" models came out *BEFORE* AMD introduced 64-bit support, and therefore support only 32-bit mode. Similarly Intel Pentium3 cpus support only 32-bit mode. -- Walter Dnes <waltd...@waltdnes.org> I don't run "desktop environments"; I run useful applications
