On Tue, Oct 9, 2018, at 8:14 PM, Lyndon Nerenberg wrote: > hiro writes: > > > Huh? What exactly do you mean? Can you describe the scenario and the > > measurements you made? > > The big one is USB. disk/radio->kernel->user-space-usbd->kernel->application. > Four copies. > > I would like to start playing with software defined radio on Plan > 9, but that amount of data copying is going to put a lot of pressure > on the kernel to keep up. UNIX/Linux suffers the same copy bloat, > and it's having trouble keeping up, too.
References, please. Programmers are notoriously bad at determining the cause of performance problems. Examining the source will help to see if "copy bloat" is the actual problem. > > --lyndon > -- Progress might have been all right once, but it has gone on too long -- Ogden Nash
