John Molohan wrote: > Duncan Webb wrote: > >> John Molohan wrote: >> >> >>> Hi, >>> >>> I'm looking for feedback on your experience on the responsiveness of the >>> TV guide when scrolling in freevo-1.x. I know is a slow area for freevo >>> but for a long time I put my bad experience with big delays down to a >>> 1GHz athlon chip. That's now been replaced with a 2.4GHz P4 celeron but >>> I don't notice any improvement. Scrolling in the guide pushes my cpu >>> usage to 100%. My TV.xml file is 2.8M but I don't think that has >>> anything to do with it, I think it's just the redraw of the screen when >>> freevo has to display new program info as you move around. >>> >>> Does anyone using freevo-1.x have a guide that's nice and responsive to >>> scroll through? If so can you share some details of versions, >>> processors, cpu load, etc. that might shed some light? >>> >>> >> You could try getting less days of data for your TV.xml to see if a >> smaller file makes a difference. How many channels do you have? >> >> > I have 19 channels. I normally grab 10 days worth of data with > tv_grab_uk_rt and then run tv_sort on it. I've just changed this to 1 > and I'll do a test with that tonight and report back. > >> With a small TV.xml (77K) and scrolling programs the load on the P3 is >> about 12% but it is difficult to say. >> >> > I know some of the P3s I've encountered make much more modern chips look > poor. Mostly thanks to a 512kb L1 cache. > >> Could you be a bit more specific about what slow is? I did do some >> timings on the TV guide once upon a time. The timings were about 0.5 >> seconds when scrolling about on a 733MHz P3. >> >> Duncan >> >> > Once I scroll off the data (or page if that's a better way to describe > it) that's displayed initially there's a long pause. I have too many > channels to list on screen at one time so for this to happen I can > scroll down until the guide has to start loading the channels that > weren't being displayed or alternatively scroll right or left to times > that weren't displayed. Once I do this I hit 100% cpu usage and the > guide pauses for maybe 250-500ms per half hour or hour of the guide > that's updated. Obviously this makes scrolling extremely slow, the lirc > commands will actually get queued as it's not refreshing quickly enough > meaning it's impossible to tell where you might end up from holding down > the remote for a few seconds. > > A quick test with no TV.xml shows when I down scroll through the empty > guide to the channels that aren't displayed originally shows no delay at > all when the screen has to draw the next channels. CPU usage shows 60% > to 75% though while doing this. > > With POLL_TIME=0.05 freevo's CPU usage is at ~19% when idle. > > John > I've just tested with 1 days worth of data. My TV.xml is 231K. Scrolling still suffers from the same pauses. The delays are longer than I'd reported. It's ~1000ms to 1500ms to change to a channel that wasn't displayed or move forward or back in time. It's ~100ms to change between entries on the page that are already displayed. The CPU usage is around 80% when changing between items already displayed and goes to 100% when it has to show new data.
I can't believe that a P4 2.4GHz celeron could be this poor. Could there be another explanation? I've checked cpufreq-info and it's running at the full clock speed. John ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com _______________________________________________ Freevo-users mailing list Freevo-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freevo-users
