Re: Minimum timing resolution in Ubuntu/Linaro on the PandaBoard ES

On 02/07/2012 02:43 PM, Somebody in the thread at some point said:

Hi -

I'm experiencing what appears to be a minimum clock resolution issue in using clock_gettime() on a PandaBoard ES running ubuntu.

Actually this is a known problem

https://bugs.launchpad.net/linaro-landing-team-ti/+bug/873453

Dave Long has been looking at it for a while, it's reported solved on 4430 Panda now, but on 4460 Panda he currently believes that there's an issue with latency at 32kHz timer register read action, ie, the cpu can read stale data from there under some circumstances.

He mentioned yesterday that this was getting discussed on the Arm Linux mailing list too.

-Andy