From 293221dddaedb410781d39fdecf3c93bb111475b Mon Sep 17 00:00:00 2001 From: Rafael Antognolli Date: Wed, 24 Jun 2020 18:52:55 +0000 Subject: [PATCH] iris: Align last_seqnos to 64 bits. last_seqnos is used in atomic operations. Specially on 32 bit platorms, it tends to be slower if it's not aligned to 64 bits (see cdc331c6f9f6b2ffc035018de4445dba9b67c1f7). This fixes a small regression on Bioshock. Fixes: aba3aed96e4 ("iris: fix export of GEM handles") Reviewed-by: Kenneth Graunke Reviewed-by: Lionel Landwerlin Part-of: --- src/gallium/drivers/iris/iris_bufmgr.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/gallium/drivers/iris/iris_bufmgr.h b/src/gallium/drivers/iris/iris_bufmgr.h index d1594ff..e69b5a5 100644 --- a/src/gallium/drivers/iris/iris_bufmgr.h +++ b/src/gallium/drivers/iris/iris_bufmgr.h @@ -203,8 +203,11 @@ struct iris_bo { * * Although this is a global field, use in multiple contexts should be * safe, see iris_emit_buffer_barrier_for() for details. + * + * Also align it to 64 bits. This will make atomic operations faster on 32 + * bit platforms. */ - uint64_t last_seqnos[NUM_IRIS_DOMAINS]; + uint64_t last_seqnos[NUM_IRIS_DOMAINS] __attribute__ ((aligned (8))); /** * Boolean of whether the GPU is definitely not accessing the buffer. -- 2.7.4