On 9/17/07, <b class="gmail_sendername">Tony Marsh</b> <<a href="mailto:myth@hillsidethickets.co.uk">myth@hillsidethickets.co.uk</a>> wrote:<div><span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
> Why do you need to run Mythtv as 32-bit on a 64-bit system?<br>><br>> Mike Perkins<br><br>I don't need to (and, in fact don't really want to) but I've heard<br>issues about getting the 32bit codecs to work under a 64bit OS, and,
<br>frankly, I need the GAF to be high on this one - If I'm constantly<br>patching / messing around with the box, trying to get things perfect<br>under a 64bit OS, I'm going to be in trouble. a lot. :)<br>On the other hand, this is going to be a little more than a combined
<br>back/front end for myth - I'm planning on running a couple of other<br>bits and pieces (if possible) with it, so i'd prefer to ring every<br>last ounce of possible performance out of the box.</blockquote><div>
<br>Of course your mileage may vary but I've been running 64 bit on my FE for couple of years and didn't really see any benefit. I finally went back to 32bit and it "solved" some of my unexplained problems. At some point I actually wasn't able to boot 64bit kernels any more (Gentoo, Fedora, Ubuntu). Tried every possible thing with acpi, apic etc. to no avail.
<br><br>On the performance side I've seen much, much bigger gain in driver improvements lately (nvidia) then 64bitness ever had. My box used to struggle with HD now CPU stays at 50-60% with no hickups. Never did any encoding though on that box, and they say that's where you might see some gain with the 64bit.
<br> <br></div>Just my 2c.<br></div>