[Mesa-dev] [PATCH v2 0/3] swr: Optimize large draws from client arrays.

[Rowley, Timothy O]

Reviewed-by: Tim Rowley <timothy.o.rowley at intel.com>

> On Jul 12, 2017, at 3:04 PM, Bruce Cherniak <bruce.cherniak at intel.com> wrote:
> 
> If size of client memory copy is too large, don't copy. The draw will
> access user-buffer directly and then block.  This is faster and more
> efficient than queuing many large client draws.
> 
> Applications that use large draws from client arrays benefit from this.
> VMD is an example.
> 
> The threshold for this path defaults to 32KB.  This value can be
> overridden by setting environment variable SWR_CLIENT_COPY_LIMIT.
> 
> v2: Use #define for default value, rather than hard-coded constant.
> 
> 
> 
> Bruce Cherniak (3):
>  swr: Remove hard-coded constant and "todo" comment.
>  swr: Move environment config options into separate function.
>  swr: Add path to draw directly from client memory without copy.
> 
> src/gallium/drivers/swr/swr_context.h   |  1 +
> src/gallium/drivers/swr/swr_draw.cpp    |  9 ++++
> src/gallium/drivers/swr/swr_scratch.cpp |  3 +-
> src/gallium/drivers/swr/swr_screen.cpp  | 73 +++++++++++++++++++++------------
> src/gallium/drivers/swr/swr_screen.h    |  2 +
> src/gallium/drivers/swr/swr_state.cpp   | 37 ++++++++++++-----
> 6 files changed, 87 insertions(+), 38 deletions(-)
> 
> -- 
> 2.11.0
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