On 06/20/2011 04:02 PM, Gilles Chanteperdrix wrote:
To make proper benchmarks, you should:
- let the latency run long
- provide some load, you can use the dohell script in xenomai-head to
generate the load.
I've generated a load using 'dd if=/dev/zero of=/dev/null' one for each
core (8 in total), which is roughly the way how xeno-test does it. The
test was running for 30 min, which is not very long but I should see the
long latencies by that time, I think at least.
That said, having some spikes is not abnormal. The real question is to
know whether the latencies your get are sufficient for your application.
Well, I think it should be OK for peak latencies < 20 us, that is what
I'm getting now.
ioctl(RTTST_RTIOC_SWTEST_CREATE_KTASK): Cannot allocate memory
You have to increase CONFIG_XENO_OPT_SYS_STACKPOOLSZ.
It is 128 Kb now. Should it be more? Is there any (thumb) rule for this
value?
Best wishes,
Jakub
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