taichi: ti.init(arch=ti.opengl) failed with Taichi 0.8.1

I think I have a rough idea why this might be happening, but in the meantime maybe use the Vulkan backend, features wise Vulkan has multiple Snode root and GL has a semi working global dynamic field, but I do suggest using Vulkan backend if it works for you!

On Thu, Sep 30, 2021, 9:30 PM Y7K4 @.***> wrote:

My laptop only has an integrated GPU, Intel HD Graphics 630.

I just tried the Julia set example with the Vulkan backend, and it worked.

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Thanks. We don’t really have your card at hand 😭 Are you able to build Taichi from source (https://docs.taichi.graphics/lang/articles/contribution/dev_install)? If so, could you compare the outcome between

• https://github.com/taichi-dev/taichi/tree/4741216f0c2ff18fa5fb70b0388fc3f27078d96b
• its parent commit ed7fa26

This would help us identify the problem a lot faster

OpenGL backend works at both 4741216f and ed7fa26e, and it fails starting from b510e807 ([opengl] Move old runtime onto Device API (#2945)). I don’t have any idea how to fix though.

Hello! Which GPU do you have? Also can you try the Vulkan backend?

On Thu, Sep 30, 2021, 8:46 PM Y7K4 @.***> wrote:

Describe the bug With Taichi 0.8.1, ti.init(arch=ti.opengl) doesn’t work.

Btw, ti.opengl with v0.7.32 and ti.cpu with v0.8.1 both work.

To Reproduce A minimal Python file to reproduce:

import taichi as ti ti.init(arch=ti.opengl)

Log/Screenshots Full error message:

(venv) @.:~$ python3 example.py [Taichi] version 0.8.1, llvm 10.0.0, commit cc2dd342, linux, python 3.8.10 [Taichi] Starting on arch=opengl [E 09/30/21 23:36:16.302 52849] @. glClearBufferSubData: GL_INVALID_OPERATION

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• Taichi Compiler Stack Traceback *

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/home/kyc/venv/lib/python3.8/site-packages/taichi/core/…/lib/taichi_core.so: taichi::Logger::error(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool) /home/kyc/venv/lib/python3.8/site-packages/taichi/core/…/lib/taichi_core.so: taichi::lang::opengl::check_opengl_error(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) /home/kyc/venv/lib/python3.8/site-packages/taichi/core/…/lib/taichi_core.so: taichi::lang::opengl::GLCommandList::CmdBufferFill::execute() /home/kyc/venv/lib/python3.8/site-packages/taichi/core/…/lib/taichi_core.so: taichi::lang::opengl::GLStream::submit(taichi::lang::CommandList*) /home/kyc/venv/lib/python3.8/site-packages/taichi/core/…/lib/taichi_core.so: taichi::lang::opengl::GLStream::submit_synced(taichi::lang::CommandList*) /home/kyc/venv/lib/python3.8/site-packages/taichi/core/…/lib/taichi_core.so: taichi::lang::opengl::OpenGlRuntime::OpenGlRuntime() /home/kyc/venv/lib/python3.8/site-packages/taichi/core/…/lib/taichi_core.so: taichi::lang::OpenglProgramImpl::materialize_runtime(taichi::lang::MemoryPool*, taichi::lang::KernelProfilerBase*, unsigned long**) /home/kyc/venv/lib/python3.8/site-packages/taichi/core/…/lib/taichi_core.so(+0x45aaeb) [0x7fcac84feaeb] /home/kyc/venv/lib/python3.8/site-packages/taichi/core/…/lib/taichi_core.so(+0x39ad2e) [0x7fcac843ed2e] python3(PyCFunction_Call+0x59) [0x5f2cc9] python3(_PyObject_MakeTpCall+0x150) [0x5f3010] python3() [0x50bf55] python3(_PyEval_EvalFrameDefault+0x57d7) [0x56fb87] python3(_PyEval_EvalCodeWithName+0x26a) [0x568d9a] python3(_PyFunction_Vectorcall+0x393) [0x5f5b33] python3(_PyEval_EvalFrameDefault+0x18eb) [0x56bc9b] python3(_PyEval_EvalCodeWithName+0x26a) [0x568d9a] python3(PyEval_EvalCode+0x27) [0x68cdc7] python3() [0x67e161] python3() [0x67e1df] python3() [0x67e281] python3(PyRun_SimpleFileExFlags+0x197) [0x67e627] python3(Py_RunMain+0x212) [0x6b6e62] python3(Py_BytesMain+0x2d) [0x6b71ed] /lib/x86_64-linux-gnu/libc.so.6: __libc_start_main python3(_start+0x2e) [0x5f96de]

Internal error occurred. Check out this page for possible solutions:https://docs.taichi.graphics/docs/lang/articles/misc/install Traceback (most recent call last): File “example.py”, line 3, in <module> ti.init(arch=ti.opengl) File “/home/kyc/venv/lib/python3.8/site-packages/taichi/lang/init.py”, line 439, in init impl.get_runtime().prog.materialize_runtime() RuntimeError: @.*** glClearBufferSubData: GL_INVALID_OPERATION

Additional comments Output of ti diagnose:

(venv) @.***:~$ ti diagnose [Taichi] version 0.8.1, llvm 10.0.0, commit cc2dd342, linux, python 3.8.10

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** Taichi Programming Language **

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Docs: https://taichi.rtfd.io/en/stable GitHub: https://github.com/taichi-dev/taichi Forum: https://forum.taichi.graphics

Taichi system diagnose:

python: 3.8.10 (default, Jun 2 2021, 10:49:15) [GCC 9.4.0] system: linux executable: /home/kyc/venv/bin/python3 platform: Linux-5.11.0-36-generic-x86_64-with-glibc2.29 architecture: 64bit ELF uname: uname_result(system=‘Linux’, node=‘kyc-T470p’, release=‘5.11.0-36-generic’, version=‘#40~20.04.1-Ubuntu SMP Sat Sep 18 02:14:19 UTC 2021’, machine=‘x86_64’, processor=‘x86_64’) locale: en_US.UTF-8 PATH: /home/kyc/venv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin PYTHONPATH: [‘/home/kyc/venv/bin’, ‘/usr/lib/python38.zip’, ‘/usr/lib/python3.8’, ‘/usr/lib/python3.8/lib-dynload’, ‘/home/kyc/venv/lib/python3.8/site-packages’, ‘/home/kyc/venv/lib/python3.8/site-packages/taichi/core/…/lib’]

No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 20.04.3 LTS Release: 20.04 Codename: focal

import: <module ‘taichi’ from ‘/home/kyc/venv/lib/python3.8/site-packages/taichi/init.py’>

cc: False cpu: True metal: False opengl: True cuda: False vulkan: True

glewinfo not available: [Errno 2] No such file or directory: ‘glewinfo’

nvidia-smi not available: [Errno 2] No such file or directory: ‘nvidia-smi’ [Taichi] version 0.8.1, llvm 10.0.0, commit cc2dd342, linux, python 3.8.10

[Taichi] version 0.8.1, llvm 10.0.0, commit cc2dd342, linux, python 3.8.10 [Taichi] Starting on arch=x64

Traceback (most recent call last): File “<string>”, line 1, in <module> File “/home/kyc/venv/lib/python3.8/site-packages/taichi/lang/init.py”, line 439, in init impl.get_runtime().prog.materialize_runtime() RuntimeError: @.*** glClearBufferSubData: GL_INVALID_OPERATION Taichi OpenGL test failed: Command ‘[’/home/kyc/venv/bin/python3’, ‘-c’, ‘import taichi as ti; ti.init(arch=ti.opengl)’]’ returned non-zero exit status 1. [W 09/30/21 23:42:04.918 53403] @.*** Arch=[<Arch.cuda: 5>] is not supported, falling back to CPU [Taichi] version 0.8.1, llvm 10.0.0, commit cc2dd342, linux, python 3.8.10 [Taichi] Starting on arch=x64

[Taichi] version 0.8.1, llvm 10.0.0, commit cc2dd342, linux, python 3.8.10

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** Taichi Programming Language **

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Docs: https://taichi.rtfd.io/en/stable GitHub: https://github.com/taichi-dev/taichi Forum: https://forum.taichi.graphics

Running example minimal … [Taichi] Starting on arch=x64

Running time: 0.36s 42

Consider attaching this log when maintainers ask about system information.

Running time: 9.40s

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