tools/perf/trace/beauty/sched_policy.c

   1 // SPDX-License-Identifier: GPL-2.0
   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         const char *policies[] = {
  21                 "NORMAL", "FIFO", "RR", "BATCH", "ISO", "IDLE", "DEADLINE",
  22         };
  23         size_t printed;
  24         int policy = arg->val,
  25             flags = policy & ~SCHED_POLICY_MASK;
  26
  27         policy &= SCHED_POLICY_MASK;
  28         if (policy <= SCHED_DEADLINE)
  29                 printed = scnprintf(bf, size, "%s", policies[policy]);
  30         else
  31                 printed = scnprintf(bf, size, "%#x", policy);
  32
  33 #define P_POLICY_FLAG(n) \
  34         if (flags & SCHED_##n) { \
  35                 printed += scnprintf(bf + printed, size - printed, "|%s", #n); \
  36                 flags &= ~SCHED_##n; \
  37         }
  38
  39         P_POLICY_FLAG(RESET_ON_FORK);
  40 #undef P_POLICY_FLAG
  41
  42         if (flags)
  43                 printed += scnprintf(bf + printed, size - printed, "|%#x", flags);
  44
  45         return printed;
  46 }
  47
  48 #define SCA_SCHED_POLICY syscall_arg__scnprintf_sched_policy