> > Hi, all! > My English is very poor, perhaps can't express the whole thing clearly, but I will >try ˇ > I am trying to use the rtlinux in our collecting data project. The OS now used is >Windows98/NT4.0, Pentium˘ó 667MHz processor, the capture speed desired is 8Mbyte/s, >interrupt periodic 10ms, record device is two IDE disks work in Raid 0 mode, the >performance is not very well, interrupts can not be responded immediately. > So I hope that rtlinux can help us to improve the performance, such as record speed >and accuracy. Later I found that the capture speed has more relations with the >written speed of hard disk than the real time performance of OS. A little >disappointed, but I kept trying and hoping to get better result than in Window98/NT >4.0. > If some one can offer some experience about this, it will be appreciated. > RTLinux will not overcome your IDE limitations - but it can easaly gurantee a realtime thread running every 10ms reliably . the problem of IDE disk-speed can be reduced drastically if you compress data - look at libz for an example of how to do this - naturally the compression depends on the data involved but you can test it with the sampled data to see if this could osolve your problem or not I would be supprised if you can't atleast get a compression factor > 2 out of libz - and the CPU processing power required for compression should also be less than the delays introduced by heavy IDE I/O.
hofrat -- [rtl] --- To unsubscribe: echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] -- For more information on Real-Time Linux see: http://www.rtlinux.org/
