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Re: Task switching problem
On Tue, Jul 05, 2005 at 10:51:05AM +0600, Yuriy Coureelo wrote:
> Dear Sir!
>
> AL> It looks like you get into trouble at 152, 153. There is a
> AL> SCHED_UNLOCK missing.
> Let's take a look at the group of lines 152-160
> The same situation is at lines 139-147, 66-74, 35-43, but there
> everything is ok.
>
> AL> You might also want to enabled more instrumentation calls.
> all the instrumentations are enabled
>
> AL> However its hard to tell what is going on here. You could change
> AL> packages/kernel/current/include/sched.inl
> AL> CYG_INSTRUMENT_SCHED(LOCK,get_sched_lock(),0);
> AL> to
> AL> CYG_INSTRUMENT_SCHED(LOCK,get_sched_lock(),__builtin_return_address(0));
> AL> and the same with the UNLOCK call. You can then get the address of
> AL> what called the lock and unlock functions.
> ok, done, got this:
Do you have assertions enabled? That might also give a clue as to what
is happening. CYGPKG_INFRA_DEBUG is what you need.
>
> Num Thread Time Arg1 Arg2
> 149 06 0x1d90 SCHED_LOCK 0x00000001 0x020053d4 radiorx_data()
> 150 06 0x1d96 MUTEX_UNLOCK 0x0211dfc0 0x00000000 radio_mutex
> 151 06 0x1d9f SCHED_UNLOCK 0x00000001 0x020053d4 radiorx_data()
> 152 06 0x1db4 SCHED_LOCK 0x00000001 0x020054c4 radioErx_proc()
> 153 06 0x1dbc SCHED_LOCK 0x00000002 0x0201adbc _flagwait
> 154 06 0x1dc3 SCHED_UNLOCK 0x00000002 0x0201adbc _flagwait
> 155 06 0x1dcf THREAD_SLEEP 0x0211dfe0 0x00000000 radioErx_thread
> 156 06 0x1dd6 SCHED_LOCK 0x00000002 0x0201ae3c _flagwait
> 157 06 0x1de0 SCHED_UNLOCK 0x00000002 0x0201ae3c _flagwait
> 158 06 0x1dea SCHED_RESCHEDULE 0x00000001 0x00000000
> 159 06 0x1df2 SCHED_RESCHEDULE 0x00000000 0x00000000
> 160 06 0x1e0f THREAD_SWITCH 0x0211dfe0 0x0208cfe4 radioErx_thread => idle_thread
What is happening at 152? Is your code locking the schedular before
calling the flag_wait function?
Andrew
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