[LITMUS^RT] high miss ratio for low task utilization

[jp walters]

> Please start the tracing first, then launch the tasks. Otherwise we don't
> get task parameter infos and the process name in the trace. (Trace records
> are discarded if no recording tracer is present. )
>
> I'm pretty sure that I did the first time.  But, to be sure, I repeated
the experiments.  I see the same results.  Can you confirm that it's
reasonable to be using the tools from:

https://github.com/brandenburg/sched-trace-tools

to pull the data out of the binary logs?  After the tasks ran to
completion, I simply ran:

job_stats st-simple-0.bin > cpu0 (for each st-simple-* and cpu*)

Now, grepping through the output, I see the following:
root at ubuntu-qemu:~/simple# grep "NAME=" *
cpu0:# task NAME=<unknown> PID=3973 COST=0 PERIOD=0 CPU=-1
cpu0:# task NAME=<unknown> PID=3972 COST=0 PERIOD=0 CPU=-1
cpu0:# task NAME=<unknown> PID=3974 COST=0 PERIOD=0 CPU=-1
cpu1:# task NAME=<unknown> PID=3974 COST=0 PERIOD=0 CPU=-1
cpu1:# task NAME=<unknown> PID=3973 COST=0 PERIOD=0 CPU=-1
cpu1:# task NAME=<unknown> PID=3972 COST=0 PERIOD=0 CPU=-1
cpu2:# task NAME=<unknown> PID=3974 COST=0 PERIOD=0 CPU=-1
cpu2:# task NAME=<unknown> PID=3972 COST=0 PERIOD=0 CPU=-1
cpu2:# task NAME=<unknown> PID=3973 COST=0 PERIOD=0 CPU=-1
cpu3:# task NAME=<unknown> PID=3974 COST=0 PERIOD=0 CPU=-1
cpu3:# task NAME=<unknown> PID=3972 COST=0 PERIOD=0 CPU=-1
cpu3:# task NAME=<unknown> PID=3973 COST=0 PERIOD=0 CPU=-1
cpu4:# task NAME=<unknown> PID=3973 COST=0 PERIOD=0 CPU=-1
cpu4:# task NAME=<unknown> PID=3972 COST=0 PERIOD=0 CPU=-1
cpu4:# task NAME=<unknown> PID=3974 COST=0 PERIOD=0 CPU=-1
cpu5:# task NAME=<unknown> PID=3973 COST=0 PERIOD=0 CPU=-1
cpu5:# task NAME=<unknown> PID=3972 COST=0 PERIOD=0 CPU=-1
cpu5:# task NAME=<unknown> PID=3974 COST=0 PERIOD=0 CPU=-1
cpu6:# task NAME=<unknown> PID=3974 COST=0 PERIOD=0 CPU=-1
cpu6:# task NAME=<unknown> PID=3972 COST=0 PERIOD=0 CPU=-1
cpu6:# task NAME=<unknown> PID=3973 COST=0 PERIOD=0 CPU=-1
cpu7:# task NAME=<unknown> PID=3973 COST=0 PERIOD=0 CPU=-1
cpu7:# task NAME=<unknown> PID=3972 COST=0 PERIOD=0 CPU=-1
cpu7:# task NAME=<unknown> PID=3974 COST=0 PERIOD=0 CPU=-1

I appreciate all of your help.

best,
JP



> Thanks,
> Björn
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