RE: Application keep restarting after scheduler is not firing more queue events

Vidar Berg — Mon, 03 Aug 2020 07:51:11 GMT

Maybe you were experiencing a blocked I2C bus (https://www.i2c-bus.org/i2c-primer/analysing-obscure-problems/blocked-bus/)? This would help explain why the device didn't recover after a soft reset.

RE: Application keep restarting after scheduler is not firing more queue events

MeliodasD — Tue, 28 Jul 2020 17:23:33 GMT

the schedule is able to add more events to the queue, because it is called periodically from a timer IRQ. since I made the modification above, I haven't present the issue yet. but I am not sure if it is solved yet

RE: Application keep restarting after scheduler is not firing more queue events

haakonsh — Fri, 24 Jul 2020 13:01:15 GMT

Do you have any logs from the TWI driver?

I find it strange that you're able to schedule new events if you're still locked inside the previous one.

I'm going on vacation for a week, but I'll assign your case to another Tech Supporter.

BR,

Håkon HoldhusI

RE: Application keep restarting after scheduler is not firing more queue events

MeliodasD — Wed, 22 Jul 2020 19:28:41 GMT

Hi haakonsh I am not using TWI pooling, I just wait for a NRF_DRV_TWI_EVT_DONE or any other event to exit from the loop before call the next TWI write/read. recently I added a timeout when entering in the loop, which I am not sure if it is working yet because the issue I am having is pretty hard to replicate

RE: Application keep restarting after scheduler is not firing more queue events

haakonsh — Tue, 21 Jul 2020 17:39:51 GMT

Hey Meliodas, I've taken your case while Susheel is on vacation.

Why do you use TWI in polling mode when it will trigger an event when it's done anyways?

RE: Application keep restarting after scheduler is not firing more queue events

MeliodasD — Fri, 17 Jul 2020 12:24:08 GMT

It is at main context at the moment scheduler gets stuck

I intentionally cut the SCL line to simulate an unresponsive TWI sensor and I had the same behavior or almost it looks like the same.

Then, I added a timeout to the loop where I wait for TWi transfers in case the sensor gets unresponsive to exit from that infinite loop. At the moment it seems working. More later

RE: Application keep restarting after scheduler is not firing more queue events

Susheel Nuguru — Fri, 17 Jul 2020 09:00:55 GMT

[quote user="MeliodasD"]what can cause that the scheduler event/queue event wont fire anymore?[/quote]

Deadlock caused by a race condition with a dependency of a flag
corrupt stack
driver being stuck and not releasing loop

It is hard to say at this point. What is the state of the context the CPU is executing when the scheduler seems stuck. Can you try increasing the scheduler queue size?

RE: Application keep restarting after scheduler is not firing more queue events

MeliodasD — Tue, 14 Jul 2020 19:36:08 GMT

Below log using RTT where I call app_sched_event_put() every 1 second

The output starts with ModuleStarts, when I initialize my module,

QueueSize the Queue size just after calling app_sched_event_put

QueueEvent when the queue is proceeded

Then when I start receive errors at app_sched_event_put

The messages are

app_sched_queue_utilization_get(), Error code from app_sched_event_put(), and timelife in seconds from my app

it shows the queue utilization after some time starts to increase and return error until my device restarts, how can I solve it?

# SEGGER J-Link RTT Viewer V6.44h Terminal Log File
# Compiled: 17:39:12 on May  3 2019
# Logging started @ 14 Jul 2020 15:36:44
00> ModuleStarts!!
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[2] 
00> QueueSize[3] 
00> QueueSize[4] 
00> QueueSize[5] 
00> QueueSize[6] 
00> QueueSize[7] 
00> QueueSize[8] 
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00> QueueSize[76] 
00> QueueSize[77] 
00> QueueSize[78] 
00> QueueSize[79] 
00> QueueSize[80] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[176] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[177]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[178] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[179] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[180] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[181] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[182]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[183]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[184] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[185]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[186] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[187]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[188]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[189]
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00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[194]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[195]
00> ModuleStarts!!		/// MODULE RESTARTED
00> QueueSize[1] 
00> QueueSize[2] 
00> QueueSize[3] 
00> QueueSize[4] 
00> QueueSize[5] 
00> QueueSize[6] 
00> QueueSize[7] 
00> QueueSize[8] 
00> QueueSize[9] 
00> QueueSize[10] 
00> QueueSize[11] 
00> QueueSize[12] 
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00> QueueSize[14] 
00> QueueSize[15] 
00> QueueSize[16] 
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00> QueueSize[79] 
00> QueueSize[80] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[81]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[82]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[83] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[84]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[85] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[86] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[87]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[88]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[89]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[90]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[91]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[92]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[93]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[94]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[95]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[96]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[97]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[98]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[99]
00> ModuleStarts!!		/// MODULE RESTARTED
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[1] 
00> 	QueueEvent!! 
00> QueueSize[2] 
00> 	QueueEvent!! 
00> QueueSize[2] 
00> 	QueueEvent!! 
00> QueueSize[2] 
00> 	QueueEvent!! 
00> QueueSize[2] 
00> 	QueueEvent!! 
00> QueueSize[2] 
00> 	QueueEvent!! 
00> QueueSize[2] 
00> 	QueueEvent!! 
00> QueueSize[2] 
00> 	QueueEvent!! 
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00> 	QueueEvent!! 
00> QueueSize[2] 
00> 	QueueEvent!! 
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00> 	QueueEvent!! 
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00> 	QueueEvent!! 
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00> 	QueueEvent!! 
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00> 	QueueEvent!! 
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00> 	QueueEvent!! 
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00> 	QueueEvent!! 
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00> 	QueueEvent!! 
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00> 	QueueEvent!! 
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00> 	QueueEvent!! 
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00> 	QueueEvent!! 
00> QueueSize[2] 
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00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[141] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[142]
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00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[145]
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00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[147] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[148]
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00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[150] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[151]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[152]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[153] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[154] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[155] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[156] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[157] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[158] 
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[159]
00> QueueSize[80] | app_sched_event_put ERROR  [4] | Lifetime[160] 
00> ModuleStarts!!		/// MODULE RESTARTED

what can cause that the scheduler event/queue event wont fire anymore?