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

[jp walters]

On Fri, Nov 21, 2014 at 11:42 AM, Björn Brandenburg <bbb at mpi-sws.org> wrote:

>
> On 21.11.2014, at 17:31, jp walters <mailinglistjp39 at gmail.com> wrote:
>
> It looks like our emails crossed.
>
> Ah, okay, I misunderstood a little.  I was starting rtspin with the -w
option, then starting st_trace.  When I start st_trace first, then I get
all of the appropriate names, costs, and periods.  So then I’m guessing
that the issue I was having earlier is from the experiment scripts and not
Litmus itself.

best,
JP

Does this still happen if you launch st_trace before starting RT tasks?
>
> Thanks,
> Björn
>
>
>
>
>
>
>
>> # Task,   Job,     Period,   Response, DL Miss?,   Lateness,  Tardiness
>> # task NAME=<unknown> PID=3802 COST=0 PERIOD=0 CPU=-1
>>   3802,     9,          0,   30657540,        0,  -29342460,          0
>>   3802,    13,          0,   32616504,        0,  -27383496,          0
>>   3802,    39,          0,   30793032,        0,  -29206968,          0
>>   3802,    89,          0,   29259038,        0,  -30740962,          0
>>   3802,    93,          0,   29860287,        0,  -30139713,          0
>>   3802,    97,          0,   29485435,        0,  -30514565,          0
>>   3802,   101,          0,   30333923,        0,  -29666077,          0
>>   3802,   131,          0,   30122722,        0,  -29877278,          0
>>   3802,   135,          0,   30649661,        0,  -29350339,          0
>> # task NAME=<unknown> PID=3801 COST=0 PERIOD=0 CPU=-1
>>
>>
>> This looks totally ok. All jobs in this trace have zero tardiness /
>> negative lateness and met their deadlines. I don't see a problem here.
>>
>> - Björn
>>
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>> litmus-dev at lists.litmus-rt.org
>> https://lists.litmus-rt.org/listinfo/litmus-dev
>>
>>
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