[mythtv-users] Poor playback performance on Mac mini
linux at thehobsons.co.uk
Tue Mar 13 07:54:27 UTC 2012
Joe Nyland wrote:
>>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
>Well, I say 50% - what the activity monitor of Mac OS shows is that
>both cores are running at around 50%.
Can be much the same thing. The (single thread) task may well get
switched between cores, so while it's limited to 100% of one core, it
isn't the same core all the time and once averaged a bit (for display
purposes) it appears as 50% each on two cores.
If you run "top", what process/program is using the CPU ? That might
help someone with deep knowledge of the code to coment.
>>>RAM usage hovers around 2GB mark on my primary frontend.
>>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?
>I've checked my RAM figures and again to get it right:
>RAM usage for MythFrontend on my iMac is 205Mb.
>RAM usage for MythFrontend on my Mac mini is around 240Mb.
>Please disregard my 2GB RAM figure from before.
It's easy to get that wrong. Like most modern OSs, Linux will use any
spare RAM for disk cache - so once you do a bit of I/O then you are
almost guaranteed to see all RAM "in use". If you cat /proc/meminfo
it gives a breakdown of what's been used for what.
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