https://community.intel.com/t5/Developing-Games-on-Intel/Opengl-glClientWaitSync-log-message-API-ID-SYNC-FLUSH-what-does/m-p/1216155#M1685 <P>Log message is:</P> <P><STRONG>OpenGL (Info) [API] [Other] : API_ID_SYNC_FLUSH other warning has been generated. ClientWait flush in different gc for sync object 6, "" will be ineffective.</STRONG></P> <P>Usage:&nbsp; I have some vertex, index and uniform buffers using the persistently mapped technique.&nbsp; If the buffer has been used that frame, I set fence in the usual way.&nbsp; Next time that buffer is used, typically after 2 more frames in ring buffer, I check status with glClientWaitSync, blocking if necessary.&nbsp; With 3 frame ring buffer, this never blocks, with single frame, it will block regularly. All as expected.</P> <P>Testing on laptop with nVidia and Intel GPUs.&nbsp; nVidia is silent on this usage and runs fine.&nbsp; Intel HD produces the noted log message repeatedly.</P> <P>What does this message mean, and how can I fix it?</P> Fri, 09 Oct 2020 06:17:07 GMT GregZero 2020-10-09T06:17:07Z https://community.intel.com/t5/Developing-Games-on-Intel/Opengl-glClientWaitSync-log-message-API-ID-SYNC-FLUSH-what-does/m-p/1216155#M1685 <P>Log message is:</P> <P><STRONG>OpenGL (Info) [API] [Other] : API_ID_SYNC_FLUSH other warning has been generated. ClientWait flush in different gc for sync object 6, "" will be ineffective.</STRONG></P> <P>Usage:&nbsp; I have some vertex, index and uniform buffers using the persistently mapped technique.&nbsp; If the buffer has been used that frame, I set fence in the usual way.&nbsp; Next time that buffer is used, typically after 2 more frames in ring buffer, I check status with glClientWaitSync, blocking if necessary.&nbsp; With 3 frame ring buffer, this never blocks, with single frame, it will block regularly. All as expected.</P> <P>Testing on laptop with nVidia and Intel GPUs.&nbsp; nVidia is silent on this usage and runs fine.&nbsp; Intel HD produces the noted log message repeatedly.</P> <P>What does this message mean, and how can I fix it?</P> Fri, 09 Oct 2020 06:17:07 GMT https://community.intel.com/t5/Developing-Games-on-Intel/Opengl-glClientWaitSync-log-message-API-ID-SYNC-FLUSH-what-does/m-p/1216155#M1685 GregZero 2020-10-09T06:17:07Z