On 06/23/2014 12:37 PM, Mattias Gaertner wrote:
Are you sure you need Epiktimer and hardware ticks for TTimer? That
sounds like overkill.
Using a hardware timer in user-space yields the lowest possible overhead
(preventing unnecessary user-space/system-space mode-switches).
If user space access to a hardware timer is not available in an arch, of
course a fallback to system calls is implemented.
Happily (a Linux aware version of) EpikTimer does exactly this and hence
a common source code (improvement of EpikTimer and Usability in NoGUI
would be commonly manageable) seems appropriate.
In fact I hoped that vDSO could provide an arch independent interface to
such timing source, but seemingly vDSO will not reach an appropriate
state in foreseeable future :-( .
-Michael
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