diff options
| author | Rob Clark <robclark@freedesktop.org> | 2013-12-13 12:48:30 -0500 |
|---|---|---|
| committer | Rob Clark <robclark@freedesktop.org> | 2013-12-13 15:48:10 -0500 |
| commit | 068ea68b3f7ebd5efcfcc2f6ae417651423c8382 (patch) | |
| tree | e094e44e8d01c33ab8e5d74aa489308f267d3eea /freedreno/kgsl | |
| parent | 1489811a805fb6b5b19d61fa99b9b962cc06bd22 (diff) | |
freedreno: add bo cache
Workloads which create many transient buffers cause significant CPU
overhead in buffer allocation, zeroing, cache maint, and mmap setup.
By caching and re-using existing buffers, the CPU overhead drops
significantly. See:
http://bloggingthemonkey.blogspot.com/2013/09/freedreno-update-moar-fps.html
A simple time based policy is used for purging the cache. Once the
kernel supports it, we could use madvise style API to handle memory
pressure scenarios a bit better.
Signed-off-by: Rob Clark <robclark@freedesktop.org>
Diffstat (limited to 'freedreno/kgsl')
| -rw-r--r-- | freedreno/kgsl/kgsl_bo.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/freedreno/kgsl/kgsl_bo.c b/freedreno/kgsl/kgsl_bo.c index 0d019cb1..585851c7 100644 --- a/freedreno/kgsl/kgsl_bo.c +++ b/freedreno/kgsl/kgsl_bo.c @@ -80,9 +80,24 @@ static int kgsl_bo_offset(struct fd_bo *bo, uint64_t *offset) static int kgsl_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op) { uint32_t timestamp = kgsl_bo_get_timestamp(to_kgsl_bo(bo)); - if (timestamp) { - fd_pipe_wait(pipe, timestamp); + + if (op & DRM_FREEDRENO_PREP_NOSYNC) { + uint32_t current; + int ret; + + ret = kgsl_pipe_timestamp(to_kgsl_pipe(pipe), ¤t); + if (ret) + return ret; + + if (timestamp > current) + return -EBUSY; + + return 0; } + + if (timestamp) + fd_pipe_wait(pipe, timestamp); + return 0; } |