Magnus Myrefors <tkv764x@tninet.se> [2003-07-17 13:51]: > > On Tue, Jul 15, 2003 at 03:08:16PM +0200, Magnus Myrefors wrote: > > > I wonder if it is considered to be a multiprocessor-system in linux if > > > you install linux on two pc's and connect them with ethernet or a bus > > > ? > > > > No, it's called a cluster. In a wider sense it is a multiprocessor > > system, but I suppose you wanted to say "SMP system", which it is not. > > > > SMP (Symetric MultiProcessing) system is a system, that contains several > > processors connected to a common bus and sharing a single memory unit. > > > > Note: You _can't_ connect two computers with a local bus. > > > Continuing on the local approach: > (In the case when you are about to send data between pc1 and pc2 using > a bus > and don't use regular packages) So you have distributed system! > Then if you use a single test to check if it's ok for the > receiving pc to start reading the data protected by the "spin lock" > type of semaphor it should be possible to loose data if the sending > pc works faster than the receiving. To avoid that you could number > the chunks of data in an ascending manner and perhaps using some of > the bandwith of the bus to exchange information about the current > chunk-number. You may also want to use two variables to check, one > that is set to 1 (by the sender) if the sender is accessing the data > to be transmitted and 0 if the data is avaible and the other set to > 1 (by the receiver) if the receiver is accessing the data and to 0 > if the data is avaible. > If I correctly understand, you are probably implementing something similar to the TCP sliding windows approach. Keywords to look for are: Selective Retransmission, Sliding Windows, Go-Back-N Approach -- this could help understanding the issue. Please correct if I am wrong totaly, i.e. have not got your point. wbr, Lukas -- Lukas Ruf | Wanna know anything about raw | <http://www.lpr.ch> | IP? <http://www.rawip.org> | -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
