gem5 / arm / linux / 3510c7aa069aa83a2de6dab2b41401a198317bdc / . / include / linux / sched / loadavg.h

#ifndef _LINUX_SCHED_LOADAVG_H | |

#define _LINUX_SCHED_LOADAVG_H | |

/* | |

* These are the constant used to fake the fixed-point load-average | |

* counting. Some notes: | |

* - 11 bit fractions expand to 22 bits by the multiplies: this gives | |

* a load-average precision of 10 bits integer + 11 bits fractional | |

* - if you want to count load-averages more often, you need more | |

* precision, or rounding will get you. With 2-second counting freq, | |

* the EXP_n values would be 1981, 2034 and 2043 if still using only | |

* 11 bit fractions. | |

*/ | |

extern unsigned long avenrun[]; /* Load averages */ | |

extern void get_avenrun(unsigned long *loads, unsigned long offset, int shift); | |

#define FSHIFT 11 /* nr of bits of precision */ | |

#define FIXED_1 (1<<FSHIFT) /* 1.0 as fixed-point */ | |

#define LOAD_FREQ (5*HZ+1) /* 5 sec intervals */ | |

#define EXP_1 1884 /* 1/exp(5sec/1min) as fixed-point */ | |

#define EXP_5 2014 /* 1/exp(5sec/5min) */ | |

#define EXP_15 2037 /* 1/exp(5sec/15min) */ | |

#define CALC_LOAD(load,exp,n) \ | |

load *= exp; \ | |

load += n*(FIXED_1-exp); \ | |

load >>= FSHIFT; | |

extern void calc_global_load(unsigned long ticks); | |

#endif /* _LINUX_SCHED_LOADAVG_H */ |