[Xen-devel] clock_gettime monotonic & realtime swapped?

[Markus Oberrauter <oberrauter@xxxxxxxxxxx>]

Hi all,

we are currently having a lot of problems with our virtualized server ( 
time jumps 73 minutes backwards ).
I tried to find out how virtualization affects the clock of the client, 
so I´ve downloaded the current xen source ( xen-4.0.0 ) and searched all 
files for "clock".
I don´t think that this will be the cause of our problems here, but I 
found an interesting switch - case statement in extras \ mini-os \ lib \ 
sys.c.
int clock_gettime(clockid_t clk_id, struct timespec *tp)
{
...
case CLOCK_MONOTONIC:
gettimeofday(&tv, NULL);
break;

case CLOCK_REALTIME:
uint64_t nsec = monotonic_clock();
break;
...
}

I had expected that CLOCK_MONOTONIC returns monotonic_clock and 
CLOCK_REALTIME returns gettimeofday().
I hope this was the right place to post this information.

Greetings,
Markus Oberrauter

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