<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On 12 Mar 2012, at 16:43, Raymond Wagner wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
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On 3/10/2012 16:51, Joe Nyland wrote:
<blockquote cite="mid:0ABDA95F-B075-4158-B5DC-19DDE9F345B2@me.com" type="cite">Xeon E31230 3.2 GHz (Quad core +HT) CPU - 4 cores
assigned to MythTV backend server</blockquote>
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So that means MythTV has full access to the CPU?<br></div></blockquote><div><br></div><div>Yes, that's correct.</div><div><br></div><br><blockquote type="cite"><div bgcolor="#FFFFFF" text="#000000">
<blockquote cite="mid:0ABDA95F-B075-4158-B5DC-19DDE9F345B2@me.com" type="cite">
<div>Recordings stored on 3 1TB Seagate drives in md RAID5</div>
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Do you have your database on this same array? What filesystem are
you using?<br></div></blockquote><div><br></div>No, the database is on my system drive, which is EXT4, barriers not disabled.</div><div><br></div><div><br></div><div><blockquote type="cite"><div bgcolor="#FFFFFF" text="#000000">
<blockquote cite="mid:0ABDA95F-B075-4158-B5DC-19DDE9F345B2@me.com" type="cite">
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<li>CPU usage is around 50% on my primary frontend when
playing back recordings - I'm not sure this is all
MythFrontend, but it proves the point that the CPU is not
exhausted.</li>
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On the contrary. It means you are using one full core of that
2.4GHz Core 2 Duo, and hitting a wall because something is single
threaded.</div></blockquote><div><br></div><div>Well, I say 50% - what the activity monitor of Mac OS shows is that both cores are running at around 50%.</div><div><br></div><br><blockquote type="cite"><div bgcolor="#FFFFFF" text="#000000">On Linux, that should be sufficient for CABAC H264
content at around 12-14Mbps, which is rather high for broadcast HD,
and well beyond what you should be seeing for SD video. </div></blockquote><br>Exactly my thoughts. Furthermore, as I have mentioned, other (non-MythTV) 1080p content plays back on this system from the same server and disk array.</div><div><br></div><div><br><blockquote type="cite"><div bgcolor="#FFFFFF" text="#000000">Considering
you are running the same version of MythTV and OSX on the iMac, is
it having similar problems?</div></blockquote><div><br></div><div>As I said, I am seeing no issues what so ever with the same build/dmg/app that I am copying to my Mac mini. Even if I run MythFrontend on my iMac (@2560x1440) playback of video is fine. This could just be tolerating an underlying issue better than my Mac mini, though, as it's a 1GB GPU...</div><div><br></div><div>I've just typed the above, then gone to check the CPU usage for your question below on my iMac. I set MythFrontend to the same resolution, as to get a fair comparison. I received the exact same behaviour on my iMac, which I hard reported from my Mac mini only. :-(</div><div><br></div><div>I set the resolution on my iMac back to full screen (2560x1440) and it's smooth again... It may seem strange, but to me, it seems like 1920x1080 resolution which is causing issues, or some reason, only in MythTV.</div><div><br></div><div><br></div><div><blockquote type="cite"><div bgcolor="#FFFFFF" text="#000000">What is the CPU usage during playback?</div></blockquote></div><div><ul><li>CPU usage for MythFrontend on my iMac is fluctuating between 60%-80%. As far as I am aware, this percentage is the percentage for one CPU core, either way, I feel it's a bit steep would you agree</li><li>CPU usage for MythFrontend on my Mac mini is 60%-70%</li></ul><div><br></div></div><blockquote type="cite"><div bgcolor="#FFFFFF" text="#000000">
<blockquote cite="mid:0ABDA95F-B075-4158-B5DC-19DDE9F345B2@me.com" type="cite">
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<li>RAM usage hovers around 2GB mark on my primary frontend.</li>
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Well that simply doesn't sound right. Even at 1080p and an artwork
intensive theme, you shouldn't be hitting half that. Are you
reading the resource usage, or the virtual memory allocation?<br></div></blockquote></div><br><div><div>I've checked my RAM figures and again to get it right: </div><div><ul class="MailOutline"><li>RAM usage for MythFrontend on my iMac is 205Mb.</li><li>RAM usage for MythFrontend on my Mac mini is around 240Mb.</li></ul><div><br></div><div>Please disregard my 2GB RAM figure from before.</div></div><div><br></div></div><div>Sorry this is a little disjointed. I hope I've provided the info required.</div><div><br></div><div>Thank you for your time.</div><div><br></div><div>Joe</div></body></html>