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Annotation of sys/dev/raidframe/rf_hist.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: rf_hist.h,v 1.3 2002/12/16 07:01:04 tdeval Exp $      */
        !             2: /*     $NetBSD: rf_hist.h,v 1.3 1999/02/05 00:06:12 oster Exp $        */
        !             3:
        !             4: /*
        !             5:  * rf_hist.h
        !             6:  *
        !             7:  * Histgram operations for RAIDframe stats.
        !             8:  */
        !             9: /*
        !            10:  * Copyright (c) 1995 Carnegie-Mellon University.
        !            11:  * All rights reserved.
        !            12:  *
        !            13:  * Author: Jim Zelenka
        !            14:  *
        !            15:  * Permission to use, copy, modify and distribute this software and
        !            16:  * its documentation is hereby granted, provided that both the copyright
        !            17:  * notice and this permission notice appear in all copies of the
        !            18:  * software, derivative works or modified versions, and any portions
        !            19:  * thereof, and that both notices appear in supporting documentation.
        !            20:  *
        !            21:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            22:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
        !            23:  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            24:  *
        !            25:  * Carnegie Mellon requests users of this software to return to
        !            26:  *
        !            27:  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
        !            28:  *  School of Computer Science
        !            29:  *  Carnegie Mellon University
        !            30:  *  Pittsburgh PA 15213-3890
        !            31:  *
        !            32:  * any improvements or extensions that they make and grant Carnegie the
        !            33:  * rights to redistribute these changes.
        !            34:  */
        !            35:
        !            36: #ifndef        _RF__RF_HIST_H_
        !            37: #define        _RF__RF_HIST_H_
        !            38:
        !            39: #include "rf_types.h"
        !            40:
        !            41: #define        RF_HIST_RESOLUTION         5
        !            42: #define        RF_HIST_MIN_VAL            0
        !            43: #define        RF_HIST_MAX_VAL         1000
        !            44: #define        RF_HIST_RANGE           (RF_HIST_MAX_VAL - RF_HIST_MIN_VAL)
        !            45: #define        RF_HIST_NUM_BUCKETS     (RF_HIST_RANGE / RF_HIST_RESOLUTION + 1)
        !            46:
        !            47: typedef RF_uint32 RF_Hist_t;
        !            48:
        !            49: #define        RF_HIST_ADD(_hist_,_val_)       do {                            \
        !            50:        RF_Hist_t val;                                                  \
        !            51:        val = ((RF_Hist_t)(_val_)) / 1000;                              \
        !            52:        if (val >= RF_HIST_MAX_VAL)                                     \
        !            53:                _hist_[RF_HIST_NUM_BUCKETS-1]++;                        \
        !            54:        else                                                            \
        !            55:                _hist_[(val - RF_HIST_MIN_VAL) / RF_HIST_RESOLUTION]++; \
        !            56: } while (0)
        !            57:
        !            58: #endif /* !_RF__RF_HIST_H_ */