Greetings. Apparently, ubd is too slow for practical use. I'm getting 0.8 Mb/s write speed, while hostfs does 25 Mb/s (and on the host itself it's similar). This is rather frustrating for such a great project as UML is, and i'd like to try fixing this.
So, two questions. First, am i missing something? Is it actually normal for ubd to be that slow? I looked around, and apparently it is slow due to design. There even were some ancient patches to try to fix that. Second, why is this problem hard? This was going on for over a decade, and no one made a better version, which implies a hard problem. I would love to hear from someone who is familiar with how the code works, about what the problems are (instead of hitting my head against them later). Specifically, why use the IO thread? Hostfs seem to work just fine with calling the native read/write directly. ------------------------------------------------------------------------------ Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San Francisco, CA to explore cutting-edge tech and listen to tech luminaries present their vision of the future. This family event has something for everyone, including kids. Get more information and register today. http://sdm.link/attshape _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
