World multiple importance sample CUDA error #40228

New Issue

Thomas Dinges · 2014-05-16T20:03:35+02:00

remibug commented

2014-05-16 20:03:35 +02:00

(Migrated from localhost:3001)

System Information
Win 7 64 bits, AMD Phenom II X6 1090T
8Go
GPU GEFORCE 580 3Go, TITAN, TITAN BLACK

Blender Version
Any version since Multiple Importance Sampling have existed in the world menu (!)

Short description of error
Enabling World menu Multiple Importance Sampling with all GPU enabled (even the one to display) cause "CUDA error: Unknown error in cuCtxSynchronize()" (and crashe renders)
Turn Off World menu Multiple Importance Sampling and render works fine !

Best regards

**System Information** Win 7 64 bits, AMD Phenom II X6 1090T 8Go GPU GEFORCE 580 3Go, TITAN, TITAN BLACK **Blender Version** Any version since Multiple Importance Sampling have existed in the world menu (!) **Short description of error** Enabling World menu Multiple Importance Sampling with all GPU enabled (even the one to display) cause "CUDA error: Unknown error in cuCtxSynchronize()" (and crashe renders) Turn Off World menu Multiple Importance Sampling and render works fine ! Best regards

remibug commented

2014-05-16 20:03:35 +02:00

(Migrated from localhost:3001)

Changed status to: 'Open'

Thomas Dinges was assigned by blender-admin

2014-05-16 20:03:35 +02:00

remibug commented

2014-05-16 20:03:35 +02:00

(Migrated from localhost:3001)

Added subscriber: @remibug

Thomas Dinges commented

2014-05-17 06:39:55 +02:00

Does it work with the individual GPUs?

Thomas Dinges removed their assignment 2014-05-17 06:40:28 +02:00

remibug commented

2014-05-17 18:34:49 +02:00

(Migrated from localhost:3001)

Yes works fine with only one GPU (even the displaying one).

Alexander Mitzkus commented

2014-05-18 14:24:39 +02:00

Added subscriber: @zuggamasta

Alexander Mitzkus commented

2014-05-18 14:24:39 +02:00

System Information
Win 7 64 bits, Intel Core i7 X980 3.33Ghz, 24GB ram
3 GPU setup:
2x GEFORCE 480, GEFORCE 750ti

Blender Version
Multiple versions with sm_50 compatibility.

Error
When using all 3 GPUs, the Mem Load gets unusual big with the error:
"CUDA error: Unkown CUDA error value in cuMemFree(cida_device_ptr(mem.device_pointer))"
BVH etc. gets built but then the image stays black

When deactivating MIS, everything works as expected.

**System Information** Win 7 64 bits, Intel Core i7 X980 3.33Ghz, 24GB ram 3 GPU setup: 2x GEFORCE 480, GEFORCE 750ti **Blender Version** Multiple versions with sm_50 compatibility. **Error** When using all 3 GPUs, the Mem Load gets unusual big with the error: "CUDA error: Unkown CUDA error value in cuMemFree(cida_device_ptr(mem.device_pointer))" BVH etc. gets built but then the image stays black **When deactivating MIS, everything works as expected.**

Brecht Van Lommel was assigned by Thomas Dinges

2014-05-18 14:28:00 +02:00

Thomas Dinges commented

2014-05-18 14:28:00 +02:00

Added subscriber: @ThomasDinges

Brecht Van Lommel changed title from ~~CUDA error: Unknown error in cuCtxSynchronize()~~ to World multiple importance sample CUDA error

2014-05-18 14:47:39 +02:00

Brecht Van Lommel commented

2014-05-18 14:55:50 +02:00

Please give the specific version number of the latest version that crashes, it's not clear to me if this happens in the 2.70a release or the latest test builds as well.

Does this happen on the default cube .blend file, no settings changed except enabling this option? Does the Map Resolution have an influence, does lowering it stop the error?

Please give the specific version number of the latest version that crashes, it's not clear to me if this happens in the 2.70a release or the latest test builds as well. Does this happen on the default cube .blend file, no settings changed except enabling this option? Does the Map Resolution have an influence, does lowering it stop the error?

Alexander Mitzkus commented

2014-05-18 17:58:05 +02:00

Hi Brecht,

The build from today 07e8096 win64, still crashes with the default cube + activated MIS

When Lowering the Map Resolution from the default 256 down to 128 the default cube is rendered with no CUDA error.
A Map Resolution of 255 is the highest value which worked for me. Everything higher crashes.

Hi Brecht, The build from today 07e8096 win64, still crashes with the default cube + activated MIS When Lowering the Map Resolution from the default 256 down to 128 the default cube is rendered with no CUDA error. A Map Resolution of 255 is the highest value which worked for me. Everything higher crashes.

remibug commented

2014-05-18 20:05:19 +02:00

(Migrated from localhost:3001)

Hi guys,
Win 7 64 bits, AMD Phenom II X6 1090T
Hash 19e627c (official 2.70, I presume) and buildbot build : Hash 30361a7

Factory Setting with default cube, 3 GPU rendering, Multi Importance Sampling Enabled --> Crash.

Map Resolution [0;255] = works fine
Map Resolution > 255 = crash.

I think a damn real bug has been spotted !

Thanks.

Hi guys, Win 7 64 bits, AMD Phenom II X6 1090T Hash 19e627c (official 2.70, I presume) and buildbot build : Hash 30361a7 Factory Setting with default cube, 3 GPU rendering, Multi Importance Sampling Enabled --> Crash. Map Resolution [0;255] = works fine Map Resolution > 255 = crash. I think a damn real bug has been spotted ! Thanks.

blender-admin commented

2014-06-05 18:10:32 +02:00

This issue was referenced by 865dfa8a7e

This issue was referenced by 865dfa8a7e8c29b2a7f0aa3e6bcdfb3353e39052

Brecht Van Lommel commented

2014-06-05 18:10:54 +02:00

Changed status from 'Open' to: 'Resolved'

Brecht Van Lommel closed this issue

2014-06-05 18:10:54 +02:00

Brecht Van Lommel commented

2014-06-05 18:10:54 +02:00

Closed by commit 865dfa8a7e.

Closed by commit 865dfa8a7e.

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World multiple importance sample CUDA error #40228