Comment # 4 on bug 1131437 from Jan Kara

So there's definitely some noticeable run-to-run variance on marvin4 with 5.0
kernel with 1, 2, and 4 processes:

Amean      1        39.99 (   0.00%)       30.06 (  24.83%)       39.55 (  
1.10%)       40.41 (  -1.06%)       27.10 (  32.24%)
Amean      2        31.76 (   0.00%)       31.41 (   1.08%)       36.08 (
-13.60%)       31.54 (   0.68%)       34.71 (  -9.31%)
Amean      4        39.32 (   0.00%)       34.54 (  12.15%)       41.13 ( 
-4.60%)       42.66 (  -8.50%)       42.64 (  -8.44%)
Amean      8        49.04 (   0.00%)       48.64 (   0.82%)       48.49 (  
1.13%)       48.90 (   0.29%)       48.61 (   0.89%)
Amean      16       70.39 (   0.00%)       70.45 (  -0.09%)       70.17 (  
0.30%)       70.09 (   0.43%)       70.25 (   0.19%)
Amean      32      131.14 (   0.00%)      128.87 (   1.73%)      129.54 (  
1.22%)      128.55 (   1.97%)      127.95 (   2.43%)
Amean      64      256.17 (   0.00%)      256.22 (  -0.02%)      254.46 (  
0.67%)      255.01 (   0.45%)      255.38 (   0.31%)