Date: Sun, 23 May 2004 20:54:42 -0700 (PDT) From: Nate Lawson <nate@root.org> To: Bruce Evans <bde@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/conf files.amd64 Message-ID: <20040523205250.T66525@root.org> In-Reply-To: <20040523183858.7C3DA16A557@hub.freebsd.org> References: <20040523183858.7C3DA16A557@hub.freebsd.org>
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On Sun, 23 May 2004, Bruce Evans wrote: > The SMP case hasn't been tested. The high resolution subcase of this uses > the i8254, and as on i386's, the locking for this is deficient and the > i8254 is too inefficient. The acpi timer is also too inefficient. The ACPI timer is significantly better than it used to be. It is currently just a bus_space_read, which maps directly to inl. The fact that IO ports are slow is inescapable. -Nate
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