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performance: what hardware works best?

asked 2012-10-27 14:50:56 -0600

cga gravatar image

updated 2012-10-28 09:55:33 -0600

I have just installed drcsim1.0 on a machine with Intel® Xeon(R) CPU 5160 @ 3.00GHz × 4, 3.9 GiB memory, 64-bit Ubuntu 12.04 LTS, NVIDIA Corporation NV44 [Quadro NVS 285] (rev a1)

I get about 0.95 Real Time Factor at best (it varies) and the window keeps getting dark and then light. Everything else I installed drcsim on got much worse Real Time Factors, but only greyed out and then brighted once (on startup).

What hardware should I buy (including CPU chip model and graphics card/GPU) to run Gazebo most effectively? How many cores, etc? I think people would be interested in two answers: 1) Something that cost around $3000. 2) A cadillac that cost around $15,000


UPDATE: I changed the graphics card to a NVIDIA Corporation G92 [GeForce 9800 GT] (rev a2) Now I get a 0.97 Real Time Factor and the display has stopped darkening and brightening after the first time.

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answered 2012-10-30 07:25:25 -0600

SL Remy gravatar image

I don't think there will be much more than consensus on what hardware works "best", especially since gazebo isn't the only thing that affects how gazebo appears to operate. But I few would disagree the more cores the better (4+ might make most happy), as much ram as you can afford (4G RAM might makes most happy).. Check here for a conversation about graphics cards.. but remember that everyone's expectations/needs aren't the same..

The most important thing I think you should do, regardless of your hardware, is make sure your software plays nice.. and this include your window manager (eg. instead of unity, use gnome-session-fallback and then use classic no effects.... or use xfce).. also take a look at parameters like the near and far clip in your world files... and also pay attention to the other applications that you're running and their CPU utilization (especially if you're using less than 4 cores).. If you're a ROS user you can tweak the rates of the other nodes that share the processor(s).

Finally, take the factor metric with a grain of salt.. in general simulation time is "squishy" and deriving the factor involves averaging over a window and then dividing by simulation time, by a sampling of real time, it's still a "squishy" metric. It's all we appear to have right now though..

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This is a great answer. I'd like to add is that we are continually working on improving performance. For GPU's we recommend nvidia, which have worked much better in linux than ATI.

nkoenig gravatar imagenkoenig ( 2012-10-30 12:17:14 -0600 )edit
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answered 2013-01-18 14:08:50 -0600

dbworth gravatar image

Chris,

Just to revive your question... as you found, you're best to stay away from the Quadro series, they are for "workstations" so are lower spec. You can jump on a hardware review site and see how the PC gaming guys compare the latest NVidia cards.

However, CPU cores might have more affect; I think is yet to fully utilize the GPU?

I am curious to know how 8+ cores would perform?

David.

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See question 624 (just press the performance tag word and look for "performance feedback"). It turns out the simulation thread is the only problem, so more than a few cores makes no difference currently.

cga gravatar imagecga ( 2013-01-18 21:09:23 -0600 )edit
SL Remy gravatar imageSL Remy ( 2013-01-23 18:36:47 -0600 )edit
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Asked: 2012-10-27 14:50:56 -0600

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Last updated: Jan 18 '13