Messages in this thread | | | Date | Fri, 22 Dec 2000 16:56:37 -0700 | From | "Jeff V. Merkey" <> | Subject | Re: bigphysarea support in 2.2.19 and 2.4.0 kernels |
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On Fri, Dec 22, 2000 at 10:39:43PM +0100, Erik Mouw wrote: > On Fri, Dec 22, 2000 at 02:54:50PM -0700, Jeff V. Merkey wrote: > > Having a 1 Gigabyte per second fat pipe that runs over a prallel bus > > fabric with a standard PCI card that costs @ $ 500 and can run LVS > > and TUX at high speeds would be for the common good, particularly since > > NT and W2K both have implementations of Dolphin SCI that allow them > > to exploit this hardware. > > I'm just wondering how you are going to do 1 Gbyte per second when you > still have to get the data through a PCI bus to that card. In theory, > standard PCI can do 133 Mbyte/s, but only when you're very lucky to be > able to burst large chunks of data. OK, 64 bit PCI at 66 MHz should > quadruple the throughput, but that's still not enough for 1 Gbyte/s.
THe fabric supports this data rate. PCI cards are limited to @ 130MB, but multiple nodes all running at the same time could generate this much traffic.
Jeff
> > > Erik > > -- > J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department > of Electrical Engineering, Faculty of Information Technology and Systems, > Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands > Phone: +31-15-2783635 Fax: +31-15-2781843 Email: J.A.K.Mouw@its.tudelft.nl > WWW: http://www-ict.its.tudelft.nl/~erik/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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