Quoting Daniele Ceraolo Spurio (2021-02-08 19:43:23) > > > On 2/6/2021 4:59 AM, Chris Wilson wrote: > > Is there any reason at all to use the batch and not just emit directly > > into the ring? The command sequence is short. And you probably want to > > disable arbitration. > > Future proofing - with multiple sessions in place we'd need to emit a > termination for each of them (pxp_emit_session_selection + > pxp_emit_inline_termination), so the sequence would be longer. It'd > still be below a page, so it should still be possible to fit it in the > ring if you believe that works better.
In terms of complexity and assurance (pre-allocated space), emitting from the ring buffer is far simpler. You can make the ring upto 512KiB, but if a single page is all that is needed for the most complicated invalidate command, 8/16KiB should be plenty. (Number of pages then equals number of invalidates that can in flight at any time, which realistically is going to be a small number.) -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
