Brad, My memory bandwidth is 779 MB/s (according to memtest). I have 512MB of RAM, but this is probably pretty old memory (PC2100, I think).
Do you think this is the problem? Does anyone have any comparison they can provide in terms of their performance with HDTV and an Athlon XP 3200+ (or even less)? I don't want to keep throwing new hardware money at the problem if it looks like I have a bottleneck somewhere in the system. Thanks, phlepper On Fri, 28 Jan 2005 00:45:38 -0800, Brad Templeton <[EMAIL PROTECTED]> wrote: > On Thu, Jan 27, 2005 at 11:46:08PM -0600, Paul Leppert wrote: > > When watching livetv on ABC (HD 720p), I end up with 0% idle using top > > 72% cpu usage for mythfrontend > > 18% cpu for mythbackend > > 6% for X > > 1% for lirc_dev > > <1% for top and others > > > > When watching livetv on NBC (HD 1080i), I end up with 0% idle using top > > 82% cpu usage for mythfrontend > > 9% cpu for mythbackend > > 7% for X > > 1% for lirc_dev > > <1% for the rest > > > > When watching recorded Fox (no recording), I end up with 10% idle using top > > 56% cpu usage for mythfrontend > > 24% for mythbackend > > 5% for X > > 1% for lirc_dev > > <1% for the rest > > > > When watching recorded NBC (no recording), I end up with 0% idle using top > > 85% cpu usage for mythfrontend > > 10% for X > > 2% for mythbackend > > 1% for lirc_dev > > <1% for the rest > > > > These numbers seem much worse than what I've read from other people > > online. What are others seeing with HDTV? Should I be getting better > > Yes, they are worse. Though actually my Athlon-3K system is currently > doing 100% saturation because I am going through more nvidia driver > problems and booting it without AGP, so I get saturation but all the CPU > is in the X server. > > Surprised to see much CPU in the back end, that I don't normally see > when it's recording. All it has to do is demux the atsc stream and write > to disk. Have not tried the 1.6 drivers, they reported it doesn't work > well on 2.6.10 in the release notes for that driver. > > Is it possible you have some sort of memory bottleneck? How's your > memory bandwidth? Try bw_mem in lmbench or memtest86. > -- I hear and I forget. I see and I remember. I do and I understand. -- Confucius
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