Example 3: Runtime Instance

ti::Runtime is an instance context of the Taichi Runtime. It is responsible of device memory allocation, memory transfer, device state tracking and Taichi kernel launches.

You can create a runtime instance targeting a specific API backend like this.

#ifdef __APPLE__
ti::Runtime runtime(TI_ARCH_METAL);
#else
ti::Runtime runtime(TI_ARCH_VULKAN);
#endif
std::cout << "created runtime" << std::endl;

If your working environment has multiple GPUs installed, you can choose which one to use with its device index. By default, Taichi selects the most powerful compute device according to an internal algorithm.

#ifdef __APPLE__
ti::Runtime runtime(TI_ARCH_METAL, 0);
#else
ti::Runtime runtime(TI_ARCH_VULKAN, 0);
#endif
std::cout << "created runtime with device #0" << std::endl;

The above C++ code may give the following output:

created runtime
created runtime with device #0

Check out this example on Github: https://github.com/PENGUINLIONG/TaichiAotByExamples/tree/main/03-runtime

_{This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.}