<qandaentry>

        <question id="scheduler-in-use">

          <para>How can I verify which scheduler is in use on a running system?</para>

        </question>

        <answer>

          <para>Just type:

            <screen>&prompt.root; <userinput>sysctl kern.quantum</userinput></screen>

            If you see

            <screen>unknown oid 'kern.quantum'</screen>

            it means that you use new <quote>SCHED_ULE</quote> scheduler, but

            if you see

            <screen>kern.quantum: 100000</screen>

	     that means your system runs under old <quote>SCHED_4BSD</quote> scheduler.

          </para>

        </answer>

      </qandaentry>

      <qandaentry>

        <question id="scheduler-kern-quantum">

          <para>What does it mean 'kern.quantum'?</para>

        </question>

        <answer>

          <para>It is the maximum number of ticks a process can run without being

            preempted.  It is specific to the 4BSD scheduler, so you can use it

            presence or absence to determine which scheduler is in use.

          </para>

        </answer>

      </qandaentry>