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Annotation of sys/dev/raidframe/rf_hist.h, Revision 1.1.1.1

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_ */