MWT2 Kernel Benchmarks

• Jira cross-reference: http://jira.usatlasfacility.org/browse/MW-393

Background

We roll a custom kernel (the so-called Ultralight Kernel) to optimize MWT2 for server operations. The most notable configuration difference from a stock RHEL-like kernel is the "No Forced Preemption" parameter set for the preemption model.

Benchmarks

Here are some results for a single run of tsibenchhepspec with each of the kernels:

	iut2-c198 (R410)	uct2-c200 (1950)	uct2-c150 (Admins.KOI)	uct2-c025 (ACT)
2.6.38-UL1	229.41	73.96	64.29	34.81
2.6.39-UL1	224.93	74.61	62.73	35.15
3.1.0-rc4UL1	232.75	75.16	66.03	36.86
3.2.13-UL2	228.17	74.37	64.48	34.57

Ilija's benchmark, wall time in seconds:

	iut2-c198 (R410)	uct2-c200 (1950)	uct2-c150 (Admins.KOI)	uct2-c025 (ACT)
2.6.38-UL1	42.08	86.37	114.26	102.14
2.6.39-UL1	42.61	84.81	162.55	101.48
3.1.0-rc4UL1	41.86	86.58	112.77	102.34
3.2.13-UL2	41.21	86.06	114.69	102.81

Ilija's benchmark, CPU time in seconds:

	iut2-c198 (R410)	uct2-c200 (1950)	uct2-c150 (Admins.KOI)	uct2-c025 (ACT)
2.6.38-UL1	35.86	79.84	109.21	98.32
2.6.39-UL1	36.46	78.83	109.98	97.60
3.1.0-rc4UL1	35.71	79.50	107.55	97.75
3.2.13-UL2	35.74	79.36	109.52	98.89

-- LincolnBryant - 18 Sep 2012

• hepspec.jpg:
  

• ilijaCPUbench.jpg: