SYS_sched_yield    29 src/pkg/runtime/sys_freebsd_arm.s #define SYS_sched_yield (SYS_BASE + 331)
SYS_sched_yield    35 src/pkg/runtime/sys_linux_arm.s #define SYS_sched_yield (SYS_BASE + 158)
SYS_sched_yield    23 src/pkg/runtime/syscall_nacl.h #define SYS_sched_yield 32