Messages in this thread | | | Date | Fri, 22 Apr 2005 14:06:20 -0700 | Subject | Re: [patch] Real-Time Preemption, -RT-2.6.12-rc3-V0.7.46-01 | From | Inaky Perez-Gonzalez <> |
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>>>>> Ingo Molnar <mingo@elte.hu> writes:
>> this includes fixes from Daniel Walker, which could fix the plist >> related slowdown bugs:
> there are still some problems remaining: i just ran Esben Nielsen's > priority-inheritance validation testsuite, and the plist code gives > a worst-case latency of 9.0 msecs.
With which machine is this?
I tried to reproduce with V0.7.45-01 in my 2xPIII 0.9 Ghz I cannot get more than 1.9ms when doing 2000 samples repeatedly (60 iterations and counting).
Did you use other parameters to 'test'?
# cnt=0 # while true > do echo -n "$cnt " > ./test --samples 2000 file.hist 2>&1 | grep maximum; cnt=$(($cnt+1)) > done
With 2.6.12-rc3-V0.7.46-02 I get:
... 2 maximum cycle time: 0.003ms 3 maximum cycle time: 1.706ms 4 maximum cycle time: 1.538ms 5 maximum cycle time: 1.168ms 6 maximum cycle time: 0.003ms 7 maximum cycle time: 0.008ms 8 maximum cycle time: 1.821ms 9 maximum cycle time: 1.013ms 10 maximum cycle time: 1.043ms 11 maximum cycle time: 1.787ms 12 maximum cycle time: 1.519ms 13 ...
roughly the same as with 0.7.45-01:
0 maximum cycle time: 1.872ms 1 maximum cycle time: 0.008ms 2 maximum cycle time: 1.947ms 3 maximum cycle time: 1.902ms 4 maximum cycle time: 1.925ms 5 maximum cycle time: 0.002ms 6 maximum cycle time: 1.950ms 7 maximum cycle time: 0.008ms 8 maximum cycle time: 0.008ms 9 maximum cycle time: 0.008ms 10 maximum cycle time: 1.943ms 11 maximum cycle time: 1.173ms 12 maximum cycle time: 0.008ms 13 maximum cycle time: 0.008ms ...
--
Inaky
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