sys/src/9/port/dtracytimer.c

   1 #include        "u.h"
   2 #include        "../port/lib.h"
   3 #include        "mem.h"
   4 #include        "dat.h"
   5 #include        "fns.h"
   6 #include        "../port/error.h"
   7
   8 #include        <dtracy.h>
   9
  10 static DTProbe *timerprobe;
  11
  12 static void
  13 dtracytimer(void *)
  14 {
  15         DTTrigInfo info;
  16
  17         memset(&info, 0, sizeof(info));
  18         for(;;){
  19                 tsleep(&up->sleep, return0, nil, 1000);
  20                 dtptrigger(timerprobe, &info);
  21         }
  22 }
  23
  24 static void
  25 timerprovide(DTProvider *prov)
  26 {
  27         timerprobe = dtpnew("timer::1s", prov, nil);
  28 }
  29
  30 static int
  31 timerenable(DTProbe *)
  32 {
  33         static int gotkproc;
  34
  35         if(!gotkproc){
  36                 kproc("dtracytimer", dtracytimer, nil);
  37                 gotkproc=1;
  38         }
  39         return 0;
  40 }
  41
  42 static void
  43 timerdisable(DTProbe *)
  44 {
  45 }
  46
  47 DTProvider dtracytimerprov = {
  48         .name = "timer",
  49         .provide = timerprovide,
  50         .enable = timerenable,
  51         .disable = timerdisable,
  52 };