Linking libvk_swiftshader.so

[jais.r...@gmail.com]

After compiling swiftshader sources we did try creating symbolic link between libvulkan.so --> libvk_swiftshader.so

When we executed vkmark benchmark it came up with below error: Can you pl guide ?

vkmark
MESA-INTEL: warning: Performance support disabled, consider sysctl dev.i915.perf_stream_paranoid=0

vulkan: No DRI3 support detected - required for presentation
Note: you can probably enable DRI3 in your Xorg config
WARNING: lavapipe is not a conformant vulkan implementation, testing use only.
../src/gallium/frontends/lavapipe/lvp_device.c:1216: VK_ERROR_FEATURE_NOT_PRESENT
Error: vk::PhysicalDevice::createDevice: ErrorFeatureNotPresent

[Nicolas Capens]

Thanks for your interest in SwiftShader!

The message indicates that Lavapipe was loaded instead of SwiftShader. For experimental purposes you can name the library libvulkan.so.1 (not libvulkan.so) to act as a substitute for the Vulkan Loader.

Otherwise, point the VK_ICD_FILENAMES environment variable to the vk_swiftshader_icd.json file path: https://vulkan.lunarg.com/doc/view/1.3.204.1/linux/LoaderDriverInterface.html#user-content-overriding-the-default-driver-discovery

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[Jaishankar Rajendran]

Hi Nicolas,

Thanks. vkmark benchmark uses libvulkan_intel.so. I tried linking libvk_swiftshader.so to libvulkan_intel.so. But it fails to launch stating 

cdsart@bacdshost06:~/swiftshader/swiftshader/lib_so_files_20.04$ vkmark
Error: vk::Instance::enumeratePhysicalDevices: ErrorInitializationFailed

Can you pl guide?

Thanks,

Jai

[Nicolas Capens]

That sounds like a problem inside vkmark. I suggest filing a bug with them.