Steven Rostedt wrote:
On Thu, 30 Jul 2009, Subrata Modak wrote:
Yup. This is different than prio-wake. Prio-wake creates some number
of threads of varying priorities and puts them to sleep on
pthread_cond_wait and then wakes them with pthread_cond_broadcast, then
tests that the threads were woken in priority order. Fails on
kernels/glibc without requeue pi support as a FUTEX_WAKE(all) was used
for PI mutexes.
So to include this in the ltp/restcases/realtime suite, the test should
make use of the librttest.c and libstats.c apis, standardized argument
parsing, buffered logging mechanism, and standardized output formatting.
I can't get to that for a little while myself, but can assist if you
have any questions. Alternatively we can wait a little while, and
perhaps someone on my team will be able to help merge it with the
realtime test infrastructure in LTP.
That should be fine.
Note,
Please take the following code:
http://rostedt.homelinux.com/code/rt-migrate-test.c
Because I got rid of the old logdev writes (ifdef out) and replaced it
with ftrace. It tries to write to ftrace if possible, but if ftrace is not
configured, it should just ignore it.
Just to be clear, Steven you want us to modify this test case so that it
uses the librttest facilities, including those for standardized argument
parsing, buffered out, and thread creation, then commit this to the
repository? I don't feel it should go in without those changes. We've
expended a lot of effort making the tests in ltp/realtime be consistent
in those areas (they all use some common command line arguments and
coding styles). This ensures that they can be easily maintained along
with the other tests in the suite and that users can know what to expect
from the test in terms of output, etc.
Thanks,
--
Darren Hart
IBM Linux Technology Center
Real-Time Linux Team
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