Subject:
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Any LDView users with quad-core machine?
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Newsgroups:
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lugnet.cad.dev
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Date:
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Tue, 11 Mar 2008 21:11:38 GMT
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Highlighted:
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I'm working on SMP support in LDView, and I'd like to have someone with a
machine with 4 CPU cores test it to see if it works properly on machines with
more than 2 CPU cores (my CPU is a dual-core). (SMP is symmetric multi
processing: multiple CPUs, or multi-core CPUs.) If anybody has such a machine,
or access to one, I'd appreciate it if they could run some tests for me. Please
contact me, and I'll get back to you with a URL to download the test LDView
from. Note that I don't care if it's a quad-core CPU, or two dual-core CPUs,
and the machine can be Windows, Mac OS X, or Linux.
Thanks.
For those who are curious, I'm putting conditional line calculations and
transparency sorting into background threads. The conditional calculations are
split up into 32 chunks and allocated to background threads as they become
available. The sorting goes to a background thread after the conditional
calculations have completed. With a dual-core machine, there's only one
background thread (plus the foreground thread once it gets to the point of
needing the conditional line data). So a machine with more cores would stress
the code in ways that can't be done with only two cores. On my computer, the
background conditional calculations speed things up a LOT (almost 2 times) on
complex models with conditionals enabled, so this could be a really nice feature
for people with multi-core machines.
--Travis
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Message has 3 Replies:
 | | Re: Any LDView users with quad-core machine?
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| (...) Hi Travis, Congratulations on getting SMP working in LDView. If you can run on Solaris, I have an 8 core with 8 hardware thread box in my office I could try things on. Maybe you'll only use 32 given the above algorithm. I have access to a two (...) (17 years ago, 12-Mar-08, to lugnet.cad.dev)
| | | Re: Any LDView users with quad-core machine?
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| (...) I recently bought an AMD Phenom Quad core running vista 64 bit. I gladly do some tests if you want. I did some thread programming myself and discovered memory/disk bandwidth is the real bottleneck with modern cpu's, just can't get enough data (...) (17 years ago, 12-Mar-08, to lugnet.cad.dev)
| | | Re: Any LDView users with quad-core machine?
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| (...) Thank you to those of you that responded to this here or via email; I now have some good feedback, and it appears to be working correctly on quad-core machines. If anyone has access to a quad-core (or more) Linux box or Mac, I'd still like to (...) (17 years ago, 14-Mar-08, to lugnet.cad.dev)
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