\brief Scheduler public header
*/
-#ifndef HH_Scheduler_
-#define HH_Scheduler_ 1
+#ifndef HH_SENF_Scheduler_Scheduler_
+#define HH_SENF_Scheduler_Scheduler_ 1
// Custom includes
#include "../Utils/Logger/SenfLog.hh"
#include "FdEvent.hh"
#include "TimerEvent.hh"
#include "SignalEvent.hh"
+#include "EventHook.hh"
//#include "scheduler.mpp"
///////////////////////////////hh.p////////////////////////////////////////
\li senf::scheduler::FdEvent for file descriptor events
\li senf::scheduler::TimerEvent for single-shot deadline timer events
\li senf::scheduler::SignalEvent for UNIX signal events
+ \li senf::scheduler::EventHook for a special event hook
These instance are owned and managed by the user of the scheduler \e not by the scheduler so the
RAII concept can be used.
/** \brief Number of watchdog events */
unsigned hangCount();
+ /** \brief Switch to using hi resolution timers
+
+ By default, timers are implemented directly using epoll. This however restricts the timer
+ resolution to that of the kernel HZ value.
+
+ High resolution timers are implemented either using POSIX timers or, when available, using
+ the Linux special \c timerfd() syscall.
+
+ POSIX timers are delivered using signals. A high timer load this increases the signal load
+ considerably. \c timerfd()'s are delivered on a file descriptor and thus don't have such a
+ scalability issue.
+
+ \warning The timer source must not be switched from a scheduler callback
+ */
+ void hiresTimers();
+
+ /** \brief Switch back to using epoll for timing
+ \see hiresTimers()
+ */
+ void loresTimers();
+
+ /** \brief return \c true, if \c timerfd() timing is available, \c false otherwise
+ \see hiresTimers()
+ */
+ bool haveScalableHiresTimers();
+
/** \brief Restart scheduler
This call will restart all scheduler dispatchers (timers, signals, file descriptors). This