| ??? 12/20/09 01:42 Read: times |
#171787 - Watchdogs are useful even if they don't help with debugging Responding to: ???'s previous message |
That may be irrelevant.
If you do have a device with a MTBF between hanging of 100 years and you use 1000 such devices for infrastructure, you will then have 10 units hang every year. This may be caused by a bug. Or maybe a very, very strong magnetic or electric disturbance. If the unit hangs until some comes visiting it, someone is going to be upset. If the problem can be solved by a silent reboot, then people will be serviced. Ever seen an automated teller machine showing a Windows blue screen? A silent reboot and reactivation would have allowed people to get their money. What about getting to a bus stop and seeing a black sign, instead of the time remaining until the next bus? Finding "why" is for the developers. The customer wants running products, which is something completely different. It is way better if the steering box in your car reboots, than if it shuts down when you are busy overtaking another car on a heavily trafficed road. |
| Topic | Author | Date |
| Micro D.I.I. Reset question | 01/01/70 00:00 | |
| if the wind blows from the west | 01/01/70 00:00 | |
| Monostable multivibrator or watchdog | 01/01/70 00:00 | |
| the problem with watchdogs | 01/01/70 00:00 | |
| Watchdogs are useful even if they don't help with debugging | 01/01/70 00:00 | |
| it's not just for debugging ... | 01/01/70 00:00 | |
| Oh yes it can! | 01/01/70 00:00 | |
| It's not as widespread as I'd hoped | 01/01/70 00:00 | |
| the best I have seen | 01/01/70 00:00 | |
| watchdog interrupt | 01/01/70 00:00 | |
That would help, but not in production | 01/01/70 00:00 |