[BENCHMARKS] 2.6.4 vs 2.6.4-mm1

Nick Piggin
2004-03-13T00:56:13Z

These are some benchmarks on a 16-way (4x4) NUMAQ. Basically
measures the scheduler patches with a couple of meaningless
but very scheduler intensive benchmarks.

hackbench:
The number in () is a projection for the time 1000 would take,
assuming a linear scaling. It is probably better shown on a
graph, but you can see a non linear element in 2.6.4 that is
basically absent in 2.6.4-mm1.

2.6.4 2.6.4-mm1
50 19.4 (388) 15.5 (310)
100 39.0 (390) 34.5 (345)
150 59.0 (393) 48.3 (322)
200 82.9 (414) 68.9 (344)
250 114.8 (459) 90.2 (360)
300 145.4 (484) 106.3 (354)
350 178.1 (508) 122.1 (348)
400 218.8 (547) 135.0 (337)
450 237.8 (528) 163.9 (364)
500 262.0 (524) 181.7 (363)

volanomark (MPS):
This one starts getting huge mmap_sem contention at 150+ coming
from futexes. Don't know what is taking the mmap_sem for writing.
Maybe just brk or mmap.

2.6.4 2.6.4-mm1
15 5850 6221
30 5682 5852
45 4736 5700
60 2857 5622
75 1024 4840
90 1832 5191
105 491 5036
120 1591 4228
135 393 4986
150 1056 1586