[Mesa-dev] Mesa built code size reduction

[Ian Romanick]

Patches 1, 2, 3v2, 4v2, 5, 6, and 7 are

Reviewed-by: Ian Romanick <ian.d.romanick at .intel.com>

On 09/20/2013 06:52 PM, Eric Anholt wrote:
> Since I'm going to be talking about the megadrivers idea next week at
> XDC, I thought I'd look at what the impact would be of an alternate
> option, and to do that I wanted to first fix up any stupid wastes of
> disk space I found.  I found more than I expected.
> 
> The last commit is an important one.  I think it accounts for most of
> the performance change of the series (and the performance loss that we
> got from dricore).  I'm planning on comparing this series to
> non-dricore and to megadrivers for the talk.
> 
> Size of mesa before:
>    text	   data	    bss	    dec	    hex	filename
>  872896	  19912	   3392	 896200	  dacc8	lib/i965_dri.so
> 3387494	 112060	  95592	3595146	 36db8a	lib/libdricore9.3.0-devel.so.1
> 
> After:
>  872850	  19912	   3392	 896154	  dac9a	lib/i965_dri.so
> 3184667	  88524	  95592	3368783	 33674f	lib/libdricore9.3.0-devel.so.1
> 
> (a little over 6% reduction)
> 
> Results of testing of CPU overhead in mesa (cairo-gl with
> INTEL_NO_HW=1.  Also had a patch for reducing _mesa_DummyProgram size
> that I found was broken after I piglited):
> 
> x before
> + after
> +------------------------------------------------------------------------------+
> |  +   x                                                                       |
> |  +   x                                                                       |
> |  +   x                                                                       |
> |  +   xx                                                                      |
> | ++ + xx                                                                      |
> | ++ + xx                                                                      |
> | ++++xxxx                                                                     |
> | ++++xxxxx                         +                                          |
> | ++++xxxxx     x+ x  +             +                              +       x   |
> | ++++xxxxx++* +x++x+++             +     x                      + +       x   |
> | ++++*xxxx+** +x++x+++       +     *    +x   +                  + +      xx x |
> | ++++**xxx+**+*x++x+**   x  ++x+ * * x+ +x   ++x  +     x+ xx+  + ++* xx xx x |
> |+++++***xx+**+*x*+x***x  xxx**x*+*+*x**x*x+* ++xxx+ x** x* xx++++++***xx xxxxx|
> |+++++********+*x*******  **x****+***x**x****+******x*** **xx****+++***xxxxxxxx|
> |     |__|____________M_____AM___A________________|_______|                    |
> +------------------------------------------------------------------------------+
>     N           Min           Max        Median           Avg        Stddev
> x 200     29.417143     47.735255      35.27498     36.471098     6.0928765
> + 200     28.254668     45.819881     33.445248     35.119495     5.5758312
> Difference at 95.0% confidence
> 	-1.3516 +/- 1.14466
> 	-3.70596% +/- 3.13853%
> 	(Student's t, pooled s = 5.84008)
> 
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