Hi, Just got confirmation that kernel does the syncing required to make sure that pread values are realiable.
-Kevin -----Original Message----- From: Rogovin, Kevin Sent: Wednesday, December 13, 2017 8:19 AM To: 'Jason Ekstrand' <ja...@jlekstrand.net> Cc: mesa-dev@lists.freedesktop.org; Lahtinen, Joonas <joonas.lahti...@intel.com> Subject: RE: [Mesa-dev] [PATCH 3/3] i965: if DEBUG_OUT_OF_BOUND_CHK is up, check that noise padding for each bo used in batchbuffer is correct Hi, > I think you want to do this at the end of submit_batch instead and add > a brw_bo_wait_rendering on the batch. Otherwise, your bounds checking is > racing with the GPU. I remember being told that pread has the kernel do the required waiting, however I am not 100% sure of this (which is why I cc'd Joonas to either confirm or deny the assertion). Joonas? -Kevin _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
