<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED NOTABUG - Invalid subgroupSize for Intel GPU" href="https://bugs.freedesktop.org/show_bug.cgi?id=108875#c7">Comment # 7</a> on <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED NOTABUG - Invalid subgroupSize for Intel GPU" href="https://bugs.freedesktop.org/show_bug.cgi?id=108875">bug 108875</a> from <a class="email" href="mailto:frustumo@gmail.com" title="Alexander <frustumo@gmail.com>"> Alexander</a> <pre>Yep, you are right. The subgroupSize is 32 only for shaders with local group size more than 896. Otherwise, the subgroupSize equals to 16. Unfortunately, there is no way to determine the actual size (or minimum size) of subgroupSize variable in the Vulkan API. It will be possible to optimize shaders better with guaranteed minimal subgroupSize value. Under Direct3D12 the subgroupSize is always 8 on Intel hardware. Maybe it will be a way to declare the subgroupSize value during shader compilation?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>