Are multiple compute pipelines parallel or serial？

[juzi5230]

As the title, in the webgpu, I create two compute pipelines to compute different attributes, I wonder the compute pipelines is parallel or serial.

If they are serial, whether I can change them to be parallel.

thank you！

The following is the code:

const commandEncoder = device.createCommandEncoder()
const computePass = commandEncoder.beginComputePass()
computePass.setPipeline(pipelineObj.computePipeline)
computePass.setBindGroup(0, pipelineObj.computeGroup)
computePass.dispatchWorkgroups(Math.ceil(NUM / 128))
computePass.end()

const computePass1 = commandEncoder.beginComputePass()
computePass1.setPipeline(pipelineObj.computeLightPipeline)
computePass1.setBindGroup(0, pipelineObj.lightGroup)
computePass1.dispatchWorkgroups(Math.ceil(NUM / 128))
computePass1.end()

[teoxoy]

As long as the resources used and passed to the shaders differ (i.e. if the pipelines don't depend on each other), they will run in parallel.

[cwfitzgerald]

I should note, they are allowed to run in parallel, if they do is up to the implementation, driver, and gpu capabilities.