l4/pkg/plr/server/src/logging.cc

   1 #include "log"
   2 #include <l4/plr/measurements.h>
   3 #include <pthread-l4.h>
   4 #include <l4/util/rdtsc.h>
   5 #include <l4/sys/debugger.h>
   6 #include <l4/sys/kdebug.h>
   7 #include <l4/sys/scheduler>
   8 #include <l4/re/env>
   9 #include <l4/re/error_helper>
  10
  11 using L4Re::chksys;
  12
  13 struct timerArgs
  14 {
  15         unsigned cpu;
  16         l4_addr_t timer;
  17 };
  18
  19
  20 static timerArgs global_arg;
  21
  22 void *timerThread(void *argp)
  23 {
  24         char const *name = "Romain::timer";
  25         L4::Cap<L4::Thread> self(pthread_getl4cap(pthread_self()));
  26         l4_debugger_set_object_name(self.cap(), name);
  27
  28         l4_sched_param_t sp = l4_sched_param(2);
  29         sp.affinity = l4_sched_cpu_set(global_arg.cpu, 0);
  30         chksys(L4Re::Env::env()->scheduler()->run_thread(self, sp));
  31
  32         INFO() << "Timer thread. CPU " << global_arg.cpu << ". Timestamp @ 0x" << std::hex << global_arg.timer;
  33
  34         while (1) {
  35                 *((volatile l4_uint64_t*)global_arg.timer) = l4_rdtsc();
  36         }
  37
  38         enter_kdebug("timer returned");
  39
  40         return 0;
  41 }
  42
  43 void
  44 Measurements::EventBuf::launchTimerThread(l4_addr_t timer, unsigned CPU)
  45 {
  46         pthread_t tmr;
  47
  48         global_arg.timer = timer;
  49         global_arg.cpu   = CPU;
  50
  51         int err = pthread_create(&tmr, 0, timerThread, (void*)&global_arg);
  52         if (err) {
  53                 ERROR() << "Error creating timer thread: " << err;
  54                 enter_kdebug();
  55         }
  56 }