Search found 34 matches

by Lynx3d
Fri Sep 21, 2007 3:40 pm
Forum: Coding Blender
Topic: multithreading limited to one core in blender's python?
Replies: 3
Views: 4765

openMP has nothing to do with Python... Problem is, while Python knows threads, those cannot run truly parallel in CPython due to the interpreter architecture. There have been experiments to remove the global interpreter lock, but the overhead to allow parallel execution made the interpreter about t...
by Lynx3d
Fri Jun 15, 2007 8:15 pm
Forum: News & Chat
Topic: Blender 2.44 crash on Intel Mac Pro
Replies: 3
Views: 3271

All those textures do sound quite heavy...i'm no expert on blender's memory management, AFAIK it uses mmap for images, that's how it gets above the 2GB limit at all (whole address space is always split between user and kernel, e.g. 2GB/2GB or 3GB/1GB for 32bit processes). The files may get loaded to...
by Lynx3d
Fri Jun 15, 2007 5:10 pm
Forum: News & Chat
Topic: Blender 2.44 crash on Intel Mac Pro
Replies: 3
Views: 3271

Indeed sounds like insufficient address space to me, i.e. 32bit limitation... And there is no 64bit Mac version, because for that you'd need a "real" 64bit OS X first (i.e. 10.5), which is not available yet. In 10.4 only the lowest level system libraries are available in 64bit, everything with GUI i...
by Lynx3d
Sat Jun 02, 2007 2:17 pm
Forum: Coding Blender
Topic: problem compiling blender with Scons-0.97 on winXP
Replies: 3
Views: 3312

Hm the release notes indicate that quite a few things have been changed, i'm not sure if it's always possible to have a more complex build configuration work with 0.96.1 AND 0.97... But yea, "nearly forever" says it, ubuntu even comes with 0.96.93 (some random 0.97 prerelease) currently, and after t...
by Lynx3d
Tue May 22, 2007 3:57 pm
Forum: Coding Blender
Topic: going 64bit
Replies: 3
Views: 2828

Yes 64bit is not about performance really. I tried to compare 32bit and 64bit builds on 64bit linux under equal conditions, i.e. both optimized to use same architecture optimization including (scalar) SSE2, on an Intel Core 2 Duo. Performance difference of 64bit varied between -10% and +25%...note t...
by Lynx3d
Thu Apr 19, 2007 1:28 pm
Forum: Coding Blender
Topic: Compiling as 32 bit on Fedora 6 64?
Replies: 3
Views: 3082

Hm...try adding '-m32' to PLATFORM_LINKFLAGS maybe?

But maybe it's worth creating a 32bit chroot environment? At least if you don't mind some wasted disk space, but it saves you from modifying the build system...
by Lynx3d
Wed Apr 04, 2007 7:22 pm
Forum: Coding Blender
Topic: finding out the os in c
Replies: 4
Views: 3100

http://predef.sourceforge.net/preos.html

But as said, only use if absolutely necessary, often blender already has OS specific stuff wrapped in blenlib (i think).
by Lynx3d
Tue Feb 20, 2007 4:41 am
Forum: Testing Builds
Topic: [bf-blender] CVS Linux x86-64 & amd64 (2007/08/26)
Replies: 10
Views: 18590

Re: [bf-blender] CVS Linux x86-64 & amd64 (2007/02/05)

I've optimized with these flags : :) CCFLAGS.extend( [ '-march=athlon64', '-O3', '-ffast-math', '-fomit-frame-pointer', '-mmmx', '-mfpmath=sse,387' ] ) CXXFLAGS.extend( [ '-march=athlon64', '-O3', '-ffast-math','-fomit-frame-pointer', '-mmmx', '-mfpmath=sse,387' ] ) Just some notes: x87 and MMX ins...
by Lynx3d
Tue Feb 20, 2007 3:04 am
Forum: Coding Blender
Topic: Building 32 Bit Blender on 64 Bit Linux (Fedora Core 6)
Replies: 10
Views: 7852

If it makes you feel better, i get weird redraw problems with 64bit compiles with an nvidia card, i guess there is something wrong in blender, but from compiler warnings and looking at the editscreen functions i couldn't find anything obvious yet...but my opengl knowledge converges to zero...basical...
by Lynx3d
Sun Jan 07, 2007 3:31 pm
Forum: Rendering
Topic: vec. blur problem with rotating objects
Replies: 2
Views: 3246

Ever wondered why it's called vector blur?
You'd need a spline based blur to solve such things...
by Lynx3d
Tue Nov 21, 2006 5:34 pm
Forum: Rendering
Topic: Setting Render CPU Priority
Replies: 4
Views: 4058

I'm afraid z3r0_d is right, priorities just affect how processing time is distributed, it does not prevent 100% CPU usage, actually the purpose is more or less to reach 100% CPU usage without making the system unusable. I'd say: try if your CPU runs stable with less than the stock voltage (if you do...
by Lynx3d
Tue Nov 21, 2006 5:14 pm
Forum: Rendering
Topic: Ambient light lightsource
Replies: 6
Views: 4430

World buttons -> AmbientR/G/B?
by Lynx3d
Tue Nov 14, 2006 6:34 pm
Forum: Coding Blender
Topic: Quick SCons question
Replies: 3
Views: 4012

Also the build process is split into many targets, they get listed when you execute scons. When i only change files from yafray export for example, i run "scons BF_QUICK=bf_yafray" and then all the other targets quickly run through as "up to date", again quite a bit faster than "--implicit-deps-unch...
by Lynx3d
Tue Oct 24, 2006 10:32 am
Forum: Coding Blender
Topic: OpenEXR 1.4.0 Windows Libraries Error
Replies: 13
Views: 17406

Argh...nasty.
That explains a lot of the troubles, probably something like this also screwed linking with /MT on te version i tried (1.2.1? not sure anymore)...
by Lynx3d
Wed Oct 18, 2006 11:03 pm
Forum: Coding Blender
Topic: OpenEXR 1.4.0 Windows Libraries Error
Replies: 13
Views: 17406

Oh wait...blender blender actually still uses /MT? Just forgot that the blender cvs has its own lib module with precompiled exr. Apparently someone build a static library with static runtime...sorry i'm afraid i told crap :) I only know for sure that yafray uses /MD for both. Originally yafray was b...