[Buildroot] times() - problem ?

Vellemans, Noel Noel.Vellemans at visionBMS.com
Thu Sep 3 15:44:32 UTC 2009


Hi


Don't know if this is the correct mailing-list to post this problem, if
not... maybe someone can point me to the correct list, or even better,
someone can point me in a direction ... Where to look for.



Buildroot (release 2009.08)
uClibc 0.9.30.1
Busybox 1.14.3
Kernel 2.6.28.10 (with Atmel patches)
GCC 4.3.3
Target AT91SAM9G20 (arm platform)


Please have a look at the following code snapshot to 'show' the problem.


while(1)
{   
   sleep(1);
   printf("\n[0x%lX ticks, %lu ticks, %ld
ticks]",times(NULL),times(NULL),times(NULL));
   fflush(stdout);
}

// this code has the following output... ..
/// .. Some 'good' lines removed ... But after some time ...
[0xFFFFEEB8 ticks, 4294962872 ticks, -4424 ticks]
[0xFFFFEF1E ticks, 4294962974 ticks, -4322 ticks]
[0xFFFFEF84 ticks, 4294963076 ticks, -4220 ticks]
[0xFFFFEFEA ticks, 4294963178 ticks, -4118 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0xFFFFFFFF ticks, 4294967295 ticks, -1 ticks]
[0x40 ticks, 64 ticks, 64 ticks]
[0xA6 ticks, 166 ticks, 166 ticks]
[0x10C ticks, 268 ticks, 268 ticks]
[0x172 ticks, 370 ticks, 370 ticks]
[0x23E ticks, 574 ticks, 574 ticks]
[0x2A4 ticks, 676 ticks, 676 ticks]


// 
The output shows...that the timer (return value from times(NULL))
freezes for some time.
( if this happens the times result is always somewhere around -4096 )

There are some busybox-tools (like 'ps' and some others) that are having
strange effects/results due to this problem.



Any hints?


Regards Noel.



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