Date: Wed, 25 Oct 2006 20:13:38 +0800 From: David Xu <davidxu@freebsd.org> To: freebsd-amd64@freebsd.org Cc: rondzierwa@comcast.net Subject: Re: Hardware topology Message-ID: <200610252013.38119.davidxu@freebsd.org> In-Reply-To: <102420062150.6756.453E8A9D000980D700001A6422007613940E999D0A07960B02019D@comcast.net> References: <102420062150.6756.453E8A9D000980D700001A6422007613940E999D0A07960B02019D@comcast.net>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wednesday 25 October 2006 05:50, rondzierwa@comcast.net wrote: > Does the amd64 kernel know anything about which memory is attached to > which processor, and which i/o bus is attached to which hypertransport > link? Can it use this information to do things like allocate pages to a > process from the memory that is physically attached to the cpu upon which > the process is running? Along these lines, is there any way to set > affinity between a process and a cpu (or set of cpu's in the case of > multicore)? > > Likewise with i/o devices, if a process or device driver wants to operate a > particular device, can it be set to run on the cpu that owns the > hypertransport connection upon which the device is connected? > > thanks, > ron. There is no unique hardware topology structure in kernel, but scheduler has some APIs can bind thread to a specific CPU, though there is no any syscall can let you do it. David Xu
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200610252013.38119.davidxu>