tools/perf/trace/beauty/sched_policy.c

   1 #include <sched.h>
   2
   3 /*
   4  * Not defined anywhere else, probably, just to make sure we
   5  * catch future flags
   6  */
   7 #define SCHED_POLICY_MASK 0xff
   8
   9 #ifndef SCHED_DEADLINE
  10 #define SCHED_DEADLINE 6
  11 #endif
  12 #ifndef SCHED_RESET_ON_FORK
  13 #define SCHED_RESET_ON_FORK 0x40000000
  14 #endif
  15
  16 static size_t syscall_arg__scnprintf_sched_policy(char *bf, size_t size,
  17                                                   struct syscall_arg *arg)
  18 {
  19         const char *policies[] = {
  20                 "NORMAL", "FIFO", "RR", "BATCH", "ISO", "IDLE", "DEADLINE",
  21         };
  22         size_t printed;
  23         int policy = arg->val,
  24             flags = policy & ~SCHED_POLICY_MASK;
  25
  26         policy &= SCHED_POLICY_MASK;
  27         if (policy <= SCHED_DEADLINE)
  28                 printed = scnprintf(bf, size, "%s", policies[policy]);
  29         else
  30                 printed = scnprintf(bf, size, "%#x", policy);
  31
  32 #define P_POLICY_FLAG(n) \
  33         if (flags & SCHED_##n) { \
  34                 printed += scnprintf(bf + printed, size - printed, "|%s", #n); \
  35                 flags &= ~SCHED_##n; \
  36         }
  37
  38         P_POLICY_FLAG(RESET_ON_FORK);
  39 #undef P_POLICY_FLAG
  40
  41         if (flags)
  42                 printed += scnprintf(bf + printed, size - printed, "|%#x", flags);
  43
  44         return printed;
  45 }
  46
  47 #define SCA_SCHED_POLICY syscall_arg__scnprintf_sched_policy