3 ms·

Looks like it's a separate issue than the one found last year, where the FAA directed 787s must be powered off before 248 days of uptime to avoid an integer ove

• justinsaccount 10y ago
  yeah, I'd say if they are saying you need to reboot every 22 days, the actual limit is at least 23.. Why cut things close? 22*3600*24 = 1900800 (x1000 for milliseconds) 23*3600*24 = 1987200 24*3600*24 = 2073600 25*3600*24 = 2160000 and, as it turns out 2^31 / 1000 = 2147483 If they are storing a time value as milliseconds in an signed 32 bit int, that would roll over every ~24:20:30
  • qb45 10y ago
    Haha, I think you nailed it. Windows 95 had exactly the same bug, except that the counter was unsigned so it was taking 48 days to crash. I only hope these machines aren't flying some modified W95 kernel :)