Re: [Flightgear-devel] Slow frame rates, --model-hz effect

2012-06-16 Thread Arnt Karlsen
On Fri, 15 Jun 2012 20:47:02 -0700 (PDT), Catherine wrote in message 
1339818422.43212.yahoomailclas...@web83907.mail.sp1.yahoo.com:

 Some years ago when I started flying FlightGear 2.0, I added
 --model-hz=480 to my startup aliases for reasons I no longer
 remember. 

..you're running the fdm at 480Hz. 

 I've continued to use these aliases through 2.4 and 2.6
 with no real ill effect.

..sounds fair,  the heavy load is graphics. 

 However, on a git build from June 13 I've noticed that using them
 really clobbers the framerate.  Instead of getting 30 - 50 fps
 without this argument, I get more like 1-2 fps with it set.  These
 frame rates are based on a default configuration, with the .fgfs
 directory erased immediately before starting.

..guys?  Help needed.
 
 I'm not sure if this is a bug or just a change in the way that this
 flag functions, but at the very least we should note in the
 documentation that this command-line argument can create problems
 with 2.7.
 
 Even without this flag set, I'm getting extremely low frame rates of
 1 - 4 fps on at least some aircraft (e.g., the Trimotor) until the
 aircraft breaks ground, then it suddenly jumps to 30+ fps.  Landing
 and taking off again retains the 30+ fps frame rate.
 
 8-core AMD machine, 8 G RAM, nVidia GTX 560,

..big enough iron, might even haul your 560 at useful frame
rates on the nouveau driver.  

 running Kubuntu Maverick.

..updated?  

-- 
..med vennlig hilsen = with Kind Regards from Arnt Karlsen
...with a number of polar bear hunters in his ancestry...
  Scenarios always come in sets of three: 
  best case, worst case, and just in case.

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[Flightgear-devel] Slow frame rates, --model-hz effect

2012-06-15 Thread Catherine James
Some years ago when I started flying FlightGear 2.0, I added --model-hz=480 to 
my startup aliases for reasons I no longer remember.  I've continued to use 
these aliases through 2.4 and 2.6 with no real ill effect.

However, on a git build from June 13 I've noticed that using them really 
clobbers the framerate.  Instead of getting 30 - 50 fps without this argument, 
I get more like 1-2 fps with it set.  These frame rates are based on a default 
configuration, with the .fgfs directory erased immediately before starting.

I'm not sure if this is a bug or just a change in the way that this flag 
functions, but at the very least we should note in the documentation that this 
command-line argument can create problems with 2.7.

Even without this flag set, I'm getting extremely low frame rates of 1 - 4 fps 
on at least some aircraft (e.g., the Trimotor) until the aircraft breaks 
ground, then it suddenly jumps to 30+ fps.  Landing and taking off again 
retains the 30+ fps frame rate.

8-core AMD machine, 8 G RAM, nVidia GTX 560, running Kubuntu Maverick.

Cathy


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threat landscape has changed and how IT managers can respond. Discussions 
will include endpoint security, mobile security and the latest in malware 
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
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