linux/net/ceph/crush/crush_ln_table.h

/*
 * Ceph - scalable distributed file system
 *
 * Copyright (C) 2015 Intel Corporation All Rights Reserved
 *
 * This is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 2.1, as published by the Free Software
 * Foundation.  See file COPYING.
 *
 */

#ifndef CEPH_CRUSH_LN_H
#define CEPH_CRUSH_LN_H

#ifdef __KERNEL__
# include <linux/types.h>
#else
# include "crush_compat.h"
#endif

/*
 * RH_LH_tbl[2*k] = 2^48/(1.0+k/128.0)
 * RH_LH_tbl[2*k+1] = 2^48*log2(1.0+k/128.0)
 */
static __s64 __RH_LH_tbl[128*2+2] = …;

/*
 * LL_tbl[k] = 2^48*log2(1.0+k/2^15)
 */
static __s64 __LL_tbl[256] = …;

#endif