Since you're into comapring benchmarks, let me contribute something from an
IBM Netfinity server with IBM ServeRaid 3L Controller, Firmware + Kernel
driver 3.60. Server is running with 1 Coppermine 650 Cpu, Kernel is 2.2.15

Test run using tiotest 0.24

Disks: 3x IBM IBM-PSG DNES-309SAHRAJ2A0800 (LVD, 8GB)

Controller set to write-through:

 Dir   Size   BlkSz  Thr#  Read (CPU%)   Write (CPU%)   Seeks (CPU%)
----- ------ ------- ---- ------------- -------------- --------------
/home  200    4096    1   11.5838 8.91% 2.25682 1.45%  158.003 0.90%
/home  200    4096    2   9.28095 5.59% 2.44794 1.48%  185.952 0.79%
/home  200    4096    4   4.18129 2.45% 2.61105 1.57%  210.765 0.94%
/home  200    4096    8   3.74263 2.39% 2.70908 1.68%  234.533 0.90%

Bye, Martin

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