Re: bigphysarea support in 2.2.19 and 2.4.0 kernels

Erik Mouw
2000-12-22T22:11:52Z

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.

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/