I observed this pattern in several shaders in Hand of Fate 2 while
investigating bugzilla #111490. This also led to the related
bugzilla #111578. The shaders from HoF2 are *not* in shader-db.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Skylake and Ice Lake had similar results. (Ice Lake shown)
total instructions in shared programs:
16222621 ->
16205419 (-0.11%)
instructions in affected programs: 798418 -> 781216 (-2.15%)
helped: 548
HURT: 0
helped stats (abs) min: 2 max: 158 x̄: 31.39 x̃: 35
helped stats (rel) min: 0.45% max: 28.64% x̄: 2.83% x̃: 2.09%
95% mean confidence interval for instructions value: -33.22 -29.56
95% mean confidence interval for instructions %-change: -3.11% -2.56%
Instructions are helped.
total cycles in shared programs:
364676209 ->
363345763 (-0.36%)
cycles in affected programs:
112810504 ->
111480058 (-1.18%)
helped: 546
HURT: 7
helped stats (abs) min: 2 max: 118913 x̄: 2439.77 x̃: 2340
helped stats (rel) min: 0.08% max: 37.56% x̄: 1.46% x̃: 1.08%
HURT stats (abs) min: 2 max: 770 x̄: 238.00 x̃: 43
HURT stats (rel) min: 0.02% max: 11.24% x̄: 3.71% x̃: 0.35%
95% mean confidence interval for cycles value: -2884.33 -1927.41
95% mean confidence interval for cycles %-change: -1.59% -1.21%
Cycles are helped.
total spills in shared programs: 8870 -> 8514 (-4.01%)
spills in affected programs: 1230 -> 874 (-28.94%)
helped: 161
HURT: 0
total fills in shared programs: 21901 -> 21348 (-2.52%)
fills in affected programs: 2120 -> 1567 (-26.08%)
helped: 155
HURT: 5
Broadwell and Haswell had similar results. (Broadwell shown)
total instructions in shared programs:
14994910 ->
14975495 (-0.13%)
instructions in affected programs: 839033 -> 819618 (-2.31%)
helped: 548
HURT: 0
helped stats (abs) min: 2 max: 299 x̄: 35.43 x̃: 49
helped stats (rel) min: 0.39% max: 19.89% x̄: 2.91% x̃: 2.22%
95% mean confidence interval for instructions value: -37.46 -33.40
95% mean confidence interval for instructions %-change: -3.12% -2.70%
Instructions are helped.
total cycles in shared programs:
386032453 ->
384450722 (-0.41%)
cycles in affected programs:
117807357 ->
116225626 (-1.34%)
helped: 547
HURT: 6
helped stats (abs) min: 2 max: 22096 x̄: 2892.01 x̃: 3926
helped stats (rel) min: 0.17% max: 10.34% x̄: 1.56% x̃: 1.31%
HURT stats (abs) min: 4 max: 60 x̄: 32.83 x̃: 29
HURT stats (rel) min: 0.38% max: 12.79% x̄: 5.86% x̃: 4.65%
95% mean confidence interval for cycles value: -3060.28 -2660.27
95% mean confidence interval for cycles %-change: -1.59% -1.37%
Cycles are helped.
total spills in shared programs: 23372 -> 21869 (-6.43%)
spills in affected programs: 11730 -> 10227 (-12.81%)
helped: 352
HURT: 0
total fills in shared programs: 34747 -> 35351 (1.74%)
fills in affected programs: 11013 -> 11617 (5.48%)
helped: 3
HURT: 347
Ivy Bridge and Sandybridge had similar results. (Ivy Bridge shown)
total instructions in shared programs:
11956420 ->
11956126 (<.01%)
instructions in affected programs: 14898 -> 14604 (-1.97%)
helped: 98
HURT: 0
helped stats (abs) min: 3 max: 3 x̄: 3.00 x̃: 3
helped stats (rel) min: 1.30% max: 3.57% x̄: 2.08% x̃: 2.00%
95% mean confidence interval for instructions value: -3.00 -3.00
95% mean confidence interval for instructions %-change: -2.18% -1.98%
Instructions are helped.
total cycles in shared programs:
178791217 ->
178790792 (<.01%)
cycles in affected programs: 149763 -> 149338 (-0.28%)
helped: 91
HURT: 7
helped stats (abs) min: 3 max: 107 x̄: 20.63 x̃: 16
helped stats (rel) min: 0.13% max: 6.91% x̄: 1.40% x̃: 1.18%
HURT stats (abs) min: 3 max: 322 x̄: 207.43 x̃: 322
HURT stats (rel) min: 0.14% max: 19.85% x̄: 12.73% x̃: 17.41%
95% mean confidence interval for cycles value: -18.94 10.27
95% mean confidence interval for cycles %-change: -1.28% 0.49%
Inconclusive result (value mean confidence interval includes 0).
projects / mesa.git / commitdiff