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Specific drivers can be directly downloaded from Nvidia, AMD, and Intel.Īny OpenCL 1.2 compliant GPU with at least 1 GB of VRAM and FP64 support can be used for SARscape: GPUs not matching these requirements are not reported under the SARscape → Preferences Common → General Parameters section. Please be aware that OpenCL support is often only included in the official full-version of the drivers that can be downloadedįrom each hardware manufacturer: default/generic drivers installed by the operating system might only provide a minimal set of the features supported by a specific model. OpenCL runtimes for a specific GPU are usually automatically installed with the GPU drivers provided by each hardware vendor. Simply use the Intel CPU-only runtime also on AMD processors, or an older version of the Intel CPU-only runtime if the latest release is not compatible with your CPU. Since some point in 2018, AMD dropped support for CPU devices (see this post).
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Under Linux, it is up to the SARscape user to download and install the proper OpenCL CPU-only runtime package compatible with his/her Linux distribution before starting the SARscape installation procedure.
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This is a normal behavior: by keeping your Intel graphics card's driver up to date, you automatically get the newest Intel CPU-only OpenCL runtime updated for free. In this case, the stand-alone Intel CPU-only runtime installation will stop with a message saying that a newer runtime is already present. Please keep in mind that a similar runtime is automatically installed with the Intel graphics driver on most laptops with an integrated graphics card. Under Windows, the installation procedure of SARscape proposes the installation of the latest version of the Intel CPU-only runtime. On the other hand, the Intel runtime also runs on AMD processors. If your processor is older than (roughly) five years, you can still install an older version of the Intel runtime, which is also provided on the aforementioned web page. Please be aware that the latest versions of the Intel CPU-only runtime require a relatively recent processor to work. Intel CPU-only runtime installers can be found at this link. Sets (such as SSE4.2 and AVX) and code vectorization techniques to speed up the execution of OpenCL kernels. Intel provides a highly-optimized CPU-only implementation of OpenCL that is taking advantage of the most recent CPU instruction
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If no OpenCL CPU-only runtime is detected by SARscape, an informative warning message is reported, but the software can be fully used with the GPU implementation. In this way, most OpenCL-related problems due to a corrupted installation or a driver issue can be easily detected by switching from an OpenCL runtime to another. These CPU-only implementations are capable to put the computational power provided by your CPU at the service of OpenCL.Īlthough not strictly required, we recommend to always have a CPU-only OpenCL runtime installed even on machines equipped with a GPU. Actually, you don't need a GPU at all to use OpenCL since CPU-only runtime versions exist. Unlike CUDA, you don't need a specific brand of GPUs to start using OpenCL.
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You can have multiple OpenCL runtime versions installed on the same computer: at any moment, you can select which version to use for SARscape under SARscape → Preferences Common → General Parameters.Īccording to the hardware characteristics of the machine that you plan to use for SARscape, the following sections might help you in finding out how to properly install and configure OpenCL. There are several different OpenCL runtime versions that are designed to work with specific devices such as CPUs, GPUs and accelerators. In order to use SARscape, a working OpenCL version 1.2 (or higher) runtime must be first installed on the target machine.Īn OpenCL runtime is a kind of third-party software driver that allows applications running on the target operating system to execute OpenCL-related operations through the selected OpenCL platform/device. Which is an open standard widely supported by most of the hardware manufacturers and software developers. We based our solution on the Open Computing Language ( OpenCL), In SARscape 5.1 we started the progressive adoption of GPGPU-based technologies to increase the processing performance through improved parallelism. SARscape 5.* OpenCL Installation Notes Last update: AP 1.