HIP CPU+GPU slower than GPU only #97554
Labels
No Label
Interest
Alembic
Interest
Animation & Rigging
Interest
Asset Browser
Interest
Asset Browser Project Overview
Interest
Audio
Interest
Automated Testing
Interest
Blender Asset Bundle
Interest
BlendFile
Interest
Collada
Interest
Compatibility
Interest
Compositing
Interest
Core
Interest
Cycles
Interest
Dependency Graph
Interest
Development Management
Interest
EEVEE
Interest
EEVEE & Viewport
Interest
Freestyle
Interest
Geometry Nodes
Interest
Grease Pencil
Interest
ID Management
Interest
Images & Movies
Interest
Import Export
Interest
Line Art
Interest
Masking
Interest
Metal
Interest
Modeling
Interest
Modifiers
Interest
Motion Tracking
Interest
Nodes & Physics
Interest
OpenGL
Interest
Overlay
Interest
Overrides
Interest
Performance
Interest
Physics
Interest
Pipeline, Assets & IO
Interest
Platforms, Builds & Tests
Interest
Python API
Interest
Render & Cycles
Interest
Render Pipeline
Interest
Sculpt, Paint & Texture
Interest
Text Editor
Interest
Translations
Interest
Triaging
Interest
Undo
Interest
USD
Interest
User Interface
Interest
UV Editing
Interest
VFX & Video
Interest
Video Sequencer
Interest
Virtual Reality
Interest
Vulkan
Interest
Wayland
Interest
Workbench
Interest: X11
Legacy
Blender 2.8 Project
Legacy
Milestone 1: Basic, Local Asset Browser
Legacy
OpenGL Error
Meta
Good First Issue
Meta
Papercut
Meta
Retrospective
Meta
Security
Module
Animation & Rigging
Module
Core
Module
Development Management
Module
EEVEE & Viewport
Module
Grease Pencil
Module
Modeling
Module
Nodes & Physics
Module
Pipeline, Assets & IO
Module
Platforms, Builds & Tests
Module
Python API
Module
Render & Cycles
Module
Sculpt, Paint & Texture
Module
Triaging
Module
User Interface
Module
VFX & Video
Platform
FreeBSD
Platform
Linux
Platform
macOS
Platform
Windows
Priority
High
Priority
Low
Priority
Normal
Priority
Unbreak Now!
Status
Archived
Status
Confirmed
Status
Duplicate
Status
Needs Info from Developers
Status
Needs Information from User
Status
Needs Triage
Status
Resolved
Type
Bug
Type
Design
Type
Known Issue
Type
Patch
Type
Report
Type
To Do
No Milestone
No project
No Assignees
5 Participants
Notifications
Due Date
No due date set.
Dependencies
No dependencies set.
Reference: blender/blender#97554
Loading…
Reference in New Issue
No description provided.
Delete Branch "%!s(<nil>)"
Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?
System Information
Operating system: OpenSUSE Tumbleweed
Graphics card: Radeon 6700XT
Blender Version
Worked: blender-3.2.0-alpha+master.179100c02126-linux.x86_64-release
Short description of error
HIP is working great but the CPU won't add any performance for rendering, renter times are a bit higher when using GPU + CPU in HIP despite the fact that is being 99% utilized.
Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).
Added subscriber: @B4rr3l
Added subscriber: @Funnybob
I can confirm same issue on iMac Pro with Vega 64. And memory usage doubles when GPU only
Added subscribers: @Sayak-Biswas, @BrianSavery, @OmarEmaraDev
Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'
I know this used to happen with Cycles before and there were workarounds like reducing tile size. But not sure about the current state, is this a known issue for HIP currently? @BrianSavery @Sayak-Biswas
Added subscriber: @SteffenD
Same goes for Optix + CPU and CUDA + CPU as well.
Currently the CPU seems to rather slow the whole rendering instead of accelerating it.
There was some work done on load balancing recently from someone in our team to improve this. I'll check if the patch was submitted or not.
Maybe you mean #95687? In any case, I guess this is a known issue, so we should mark similar reports as such?
Yeah that is the one, I suppose we can mark this as a duplicate
Closed as duplicate of #95687