tools/perf/trace/beauty/sched_policy.c

   1 // SPDX-License-Identifier: LGPL-2.1
   2 #include <sched.h>
   3
   4 /*
   5  * Not defined anywhere else, probably, just to make sure we
   6  * catch future flags
   7  */
   8 #define SCHED_POLICY_MASK 0xff
   9
  10 #ifndef SCHED_DEADLINE
  11 #define SCHED_DEADLINE 6
  12 #endif
  13 #ifndef SCHED_RESET_ON_FORK
  14 #define SCHED_RESET_ON_FORK 0x40000000
  15 #endif
  16
  17 static size_t syscall_arg__scnprintf_sched_policy(char *bf, size_t size,
  18                                                   struct syscall_arg *arg)
  19 {
  20         bool show_prefix = arg->show_string_prefix;
  21         const char *prefix = "SCHED_";
  22         const char *policies[] = {
  23                 "NORMAL", "FIFO", "RR", "BATCH", "ISO", "IDLE", "DEADLINE",
  24         };
  25         size_t printed;
  26         int policy = arg->val,
  27             flags = policy & ~SCHED_POLICY_MASK;
  28
  29         policy &= SCHED_POLICY_MASK;
  30         if (policy <= SCHED_DEADLINE)
  31                 printed = scnprintf(bf, size, "%s%s", show_prefix ? prefix : "", policies[policy]);
  32         else
  33                 printed = scnprintf(bf, size, "%#x", policy);
  34
  35 #define P_POLICY_FLAG(n) \
  36         if (flags & SCHED_##n) { \
  37                 printed += scnprintf(bf + printed, size - printed, "|%s%s", show_prefix ? prefix : "",  #n); \
  38                 flags &= ~SCHED_##n; \
  39         }
  40
  41         P_POLICY_FLAG(RESET_ON_FORK);
  42 #undef P_POLICY_FLAG
  43
  44         if (flags)
  45                 printed += scnprintf(bf + printed, size - printed, "|%#x", flags);
  46
  47         return printed;
  48 }
  49
  50 #define SCA_SCHED_POLICY syscall_arg__scnprintf_sched_policy