2010/12/14 Michel Dänzer <[email protected]>: > On Mon, 2010-12-13 at 19:42 +0100, Maarten Maathuis wrote: >> - Apps like xterm can trigger a lot of fallback rendering. >> - This can lead to (annoyingly) high latencies, because you >> have to wait for the block handler. >> - You need a driver that doesn't directly access the front >> buffer to trigger this (NV50+ nouveau for example). >> - Repeatingly doing dmesg on an xterm with a bitmap font >> will reveal that you never see part of the text. >> - I have recieved at least one complaint in the past of slow >> terminal performance, which was related to core font >> rendering. >> - This does sacrifice some throughput, not sure how much, > > Shouldn't be hard to measure.
I did a little test (catting a saved copy of dmesg) and the throughput loss is about 25%. > >> but users tend to respond poorly to unexpected latency IMO. > > I'm sure some do, but I also suspect some do to unexpected slowness. :} > > > -- > Earthling Michel Dänzer | http://www.vmware.com > Libre software enthusiast | Debian, X and DRI developer > -- Far away from the primal instinct, the song seems to fade away, the river get wider between your thoughts and the things we do and say. _______________________________________________ [email protected]: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: http://lists.x.org/mailman/listinfo/xorg-devel
