If you are not passing an initial pointer to the SYCL buffer (i.e., you construct is as sycl::buffer foo(someRange)), then the first copy is triggered by the SYCL runtime, the CUDA backend simply "responds" to
@llvm/pr-subscribers-backend-amdgpu Author: Vigneshwar Jayakumar (VigneshwarJ) Changes gfx950 needs more additional waitstates from gfx940 Full diff:https://github.com/llvm/llvm-project/pull/126732.diff 3 Files Affected: (modified) llvm/lib/Target/AMDGPU/GCNHazardRecognizer.cpp (+9-7) (modifi...
我们在本文最开始提到:所有的 Sanitizer 都由编译时插桩和运行时库两部分组成,并且几乎所有的 Sanitizer 的插桩部分都是通过 LLVM pass 的方式实现的。我们的 DumbSanitizer 也不例外。(关于 LLVM pass 的编写,见Writing an LLVM Pass) 本节就来说明 DumbSanitizer 的插桩部分是如何实现的。 这里只对一些关键点进行...
When using write and discard_write accessors with the CUDA backend a Host to Device copy is made. Even though this is supposed to be write only which does not need such an action and this is wasted resources. queue.submit([&] (cl::sycl::handler& cgh) {auto input_acc = input....
When using write and discard_write accessors with the CUDA backend a Host to Device copy is made. Even though this is supposed to be write only which does not need such an action and this is wasted resources. queue.submit([&] (cl::sycl::handler& cgh) {auto input...
@llvm/pr-subscribers-backend-amdgpu Author: Matt Arsenault (arsenm) Changes This was trying to hack around the intermediate VGPR requirement to copy to AGPRs on gfx908. We should still use a copy for all reg-to-reg cases. This should matter less these days, as we reserve a VGPR to...
We found a lot of the perf degradation came from the above and to mitigate it now, we have provided a way to switch off the culprit compiler transformation by compiling with the -mllvm -enable-global-offset=false. I confirm that-mllvm -enable-global-offset=falsefixed the performance issue...
When using write and discard_write accessors with the CUDA backend a Host to Device copy is made. Even though this is supposed to be write only which does not need such an action and this is wasted resources. queue.submit([&] (cl::sycl::handler& cgh) {auto input_acc = input.g...
Also, llvm doesn't skip consecutive zeros in the data segment. Running wasm-opt (from binaryen project) removes them and reduces code size further.Using the Binaryen toolkit we can optimize even further than LLVM's WebAssembly backend does....
backend: Vulkan } 2024-04-17T19:38:58.208443Z INFO wgpu_core::instance: Adapter Vulkan AdapterInfo { name: "llvmpipe (LLVM 15.0.7, 256 bits)", vendor: 65541, device: 0, device_type: Cpu, driver: "llvmpipe", driver_info: "Mesa 24.0.4 (LLVM 15.0.7)", backend: Vulkan } 2024-04-...