Re: BFS vs. mainline scheduler benchmarks and measurements

[Felix Fietkau]

Ingo Molnar wrote:
> * Felix Fietkau <nbd@xxxxxxxxxxx> wrote:
>> I did some tests with BFS v230 vs CFS on Linux 2.6.30 on a different
>> MIPS device (Atheros AR2317) with 180 MHz and 16 MB RAM. When running
>> iperf tests, I consistently get the following results when running the
>> transfer from the device to my laptop:
>> 
>> CFS: [  5]  0.0-60.0 sec    107 MBytes  15.0 Mbits/sec
>> BFS: [  5]  0.0-60.0 sec    119 MBytes  16.6 Mbits/sec
>> 
>> The transfer speed from my laptop to the device are the same with BFS
>> and CFS. I repeated the tests a few times just to be sure, and I will
>> check vmstat later.
> 
> Which exact mainline kernel have you tried? For anything performance 
> related running latest upstream -git (currently at 202c467) would be 
> recommended.
I used the OpenWrt-patched 2.6.30. Support for the hardware that I
tested with hasn't been merged upstream yet. Do you think that the
scheduler related changes after 2.6.30 are relevant for non-SMP
performance as well? If so, I'll work on a test with latest upstream
-git with the necessary patches when I have time for it.

- Felix
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