Re: [BENCHMARK] AIM7 fserver regressed in 2.5.70*

[Nick Piggin]

[e-mail] wrote:

>Summary:
>AIM7 fileserver workload behaviour changed with 2.5.70.
>At low task counts (load average), 2.5.70* takes 40% 
>longer than 2.5.69.  As task count increases, regression
>disappears.
>
>Hardware has (4) 700 mhz P3 Xeons.
>3.75 GB RAM
>RAID 0 LUN (hardware raid)
>
>Background:
>AIM7 fserver is the only regressed workload.  In general, 
>2.5.70* has better numbers than 2.5.69* for a variety of
>benchmarks.
>
>
[snip]

>AIM7 fserver workload
>kernel             Tasks  Jobs/Min      Real       CPU
>2.5.69               4	 120.9	      200.5	  32.8
>2.5.69-bk1           4	 122.3	      198.2	  33.8
>2.5.69-mm3           4	 122.3	      198.3	  37.9
>2.5.69-mm5           4	 124.0	      195.5	  38.0
>
      ^^^^^^
I think this was the last kernel Joel tested before a
similar magnitude dropoff in WimMark performance.

>
>2.5.70               4	  79.0	      306.9	  34.2
>2.5.70-mjb1          4	  83.4	      290.8	  33.6
>2.5.70-mm3           4	  71.7	      338.0	  34.9
>2.5.70-mm4	     4    73.9        328.0       33.9
> 
>

I don't know what sort of disk IO fserver does, but it
could be the same problem.