[Mesa-dev] [PATCH 03/10] i965/nir: Report NIR instruction counts (in SSA form) via KHR_debug.

[Jason Ekstrand]

On Jan 22, 2015 3:41 AM, "Kenneth Graunke" <kenneth at whitecape.org> wrote:
>
> This allows us to count NIR instructions via shader-db.
>
> Use "run" as normal.  The results file will contain both NIR and
> assembly.
>
> Then, to generate a NIR report:
> ./report.py <(grep    NIR results/foo) <(grep    NIR results/bar)
>
> Or, to generate an i965 report:
> ./report.py <(grep -v NIR results/foo) <(grep -v NIR results/bar)
>
> Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
> ---
>  src/mesa/drivers/dri/i965/brw_fs_nir.cpp | 32
++++++++++++++++++++++++++++++++
>  1 file changed, 32 insertions(+)
>
> I'm guessing the counting should really go in nir proper.
> This is what I used to generate the statistics, in case people were
> wondering.
>
> diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
> index 2d30321..0eb137f 100644
> --- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
> +++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
> @@ -49,6 +49,28 @@ nir_optimize(nir_shader *nir)
>     } while (progress);
>  }
>
> +static bool
> +count_nir_instrs_in_block(nir_block *block, void *state)
> +{
> +   int *count = (int *) state;
> +   nir_foreach_instr(block, instr) {
> +      *count = *count + 1;

*count++?  Also, we could get rid of the braces on this if.  Otherwise, I
like this.

> +   }
> +   return true;
> +}
> +
> +static int
> +count_nir_instrs(nir_shader *nir)
> +{
> +   int count = 0;
> +   nir_foreach_overload(nir, overload) {
> +      if (!overload->impl)
> +         continue;
> +      nir_foreach_block(overload->impl, count_nir_instrs_in_block,
&count);
> +   }
> +   return count;
> +}
> +
>  void
>  fs_visitor::emit_nir_code()
>  {
> @@ -99,6 +121,16 @@ fs_visitor::emit_nir_code()
>        nir_print_shader(nir, stderr);
>     }
>
> +   if (dispatch_width == 8) {
> +      static GLuint msg_id = 0;
> +      _mesa_gl_debug(&brw->ctx, &msg_id,
> +                     MESA_DEBUG_SOURCE_SHADER_COMPILER,
> +                     MESA_DEBUG_TYPE_OTHER,
> +                     MESA_DEBUG_SEVERITY_NOTIFICATION,
> +                     "FS NIR shader: %d inst\n",
> +                     count_nir_instrs(nir));
> +   }
> +
>     nir_convert_from_ssa(nir);
>     nir_validate_shader(nir);
>     nir_lower_vec_to_movs(nir);
> --
> 2.2.2
>
> _______________________________________________
> mesa-dev mailing list
> mesa-dev at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/mesa-dev
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/mesa-dev/attachments/20150122/31cfe65e/attachment.html>