On 6/4/13 8:51 PM, Nathan Kidd wrote: > Is there a reason for -fps to not automatically enable -sp? > > I'm not thinking of any use case for -fps apart from -sp; as you've > said, in the typical use case of wanting to rate-limit your > app/bandwidth you always need -sp.
Not true. VGL_FPS was originally implemented as a poor man's bandwidth limiter, and it also limits server CPU usage at the same time. However, you generally still want frame spoiling to be enabled if you are running an interactive app, so that the "apparent rendering rate" keeps up with your mouse activity. In fact, if you are limiting the frame rate of the compress/send thread, then frame spoiling becomes even more important in order to maintain an interactive "feel" for the application. Why frame spoiling isn't important in Dyweni's case is that he wants to limit the 3D rendering frame rate to less than what the compress/send thread on his machine is capable of, and if the 3D rendering thread is not keeping the compress/send thread 100% busy, then frame spoiling isn't going to occur anyhow. In the case of apps that are primarily mouse-driven, the 3D rendering rate on the server will ultimately be gated by the mouse sampling rate in VNC, but that's not necessarily the case for games. A lot of games are "free-running", in the sense that they will render as fast as they can, and your input controls the content but not the speed of the rendering. This is why I'm interested in implementing the GLX_EXT_swap_control extension. I could foresee the need to frame rate limit a game to 60 Hz, even though the image transport pipeline may only be capable of 30 or 15. ------------------------------------------------------------------------------ How ServiceNow helps IT people transform IT departments: 1. A cloud service to automate IT design, transition and operations 2. Dashboards that offer high-level views of enterprise services 3. A single system of record for all IT processes http://p.sf.net/sfu/servicenow-d2d-j _______________________________________________ VirtualGL-Users mailing list VirtualGL-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/virtualgl-users
