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Hi i want to use a high resolution clock to support my realtime app.
I was using gettimeofday() b4, but now i want to sync time at some machines and now this timebase is no longer a stable one.
So i tried to use not CLOCK_REALTIME and found CLOCK_MONOTONIC.
Had to link librt to my app, compiles fine but :
If i call clock_gettime with clockid CLOCK_MONOTONIC on my target machine, i got a retval of -1, meaning this is not supported by the system.
Running my app with the same kernel on my developing machine, this works quite fine but on the target system (a cyrix C3-2) it just returns -1 !!
Can somebody explain me, why on my cyrix machine it does not work and on a plain P4 desktop it does (with the same (self-compiled) kernel)? Can it be a problem with glibc or really with the hardware ?
I also found out, that on the cyrix, the clock_getres for REALTIME gaves me about 10ms and on the P4 it says about 1ms .....
Does someone know other methods to get a monothonic clock with at least 1ms res ?
Btw, i'm using kernel 2.6.16-16
Last edited by nathan2225; 07-18-2006 at 11:26 AM.
Somehow all the slackware packages (i'm using slackware tgz packages) were compiled with emulated timers, not using the timers offered by the OS.
I tried a debian compiled glibc package and it suddenly worked, hurray !!