ltt-control/facilities/timer.xml

   1 <?xml version="1.0"?>
   2 <facility name="timer">
   3   <description>The timer facility has events related to timer events in the kernel.</description>
   4
   5   <type name="itimer_kind">
   6     <enum>
   7       <label name="ITIMER_REAL" value="0"> <description>decrements in real time,
   8       and delivers SIGALRM upon expiration.</description>
   9       <label name="ITIMER_VIRTUAL" value="1"> <description>decrements only when the
  10       process is executing, and delivers SIGVTALRM upon expiration.</description>
  11       <label name="ITIMER_PROF" value="2"> <description>decrements both when the
  12       process executes and when the system is executing on behalf of the
  13       process. Coupled with ITIMER_VIRTUAL, this timer is usually used to
  14       profile the time spent by the application in user and kernel space.
  15       SIGPROF is delivered upon expiration.</description>
  16     </enum>
  17   </type>
  18
  19   <event name="expired">
  20     <description>A timer or itimer has expired.</description>
  21     <field name="pid">
  22                         <description>PID of the process to wake up.</description>
  23                         <uint size="4">
  24                 </field>
  25   </event>
  26
  27   <event name="softirq">
  28     <description>The timer softirq is currently runned.</description>
  29   </event>
  30
  31   <event name="set_itimer">
  32     <description>An interval timer is set.</description>
  33     <field name="which"> <description>kind of interval timer.</description>
  34             <typeref name="itimer_kind">
  35                 </field>
  36     <field name="interval_seconds"><uint size="4"></field>
  37     <field name="interval_microseconds"><uint size="4"></field>
  38     <field name="value_seconds"><uint size="4"></field>
  39     <field name="value_microseconds"><uint size="4"></field>
  40   </event>
  41
  42 </facility>