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      1 /*	$NetBSD: rf_hist.h,v 1.4 2001/10/04 15:58:53 oster Exp $	*/
      2 /*
      3  * rf_hist.h
      4  *
      5  * Histgram operations for RAIDframe stats
      6  */
      7 /*
      8  * Copyright (c) 1995 Carnegie-Mellon University.
      9  * All rights reserved.
     10  *
     11  * Author: Jim Zelenka
     12  *
     13  * Permission to use, copy, modify and distribute this software and
     14  * its documentation is hereby granted, provided that both the copyright
     15  * notice and this permission notice appear in all copies of the
     16  * software, derivative works or modified versions, and any portions
     17  * thereof, and that both notices appear in supporting documentation.
     18  *
     19  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     20  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     21  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     22  *
     23  * Carnegie Mellon requests users of this software to return to
     24  *
     25  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     26  *  School of Computer Science
     27  *  Carnegie Mellon University
     28  *  Pittsburgh PA 15213-3890
     29  *
     30  * any improvements or extensions that they make and grant Carnegie the
     31  * rights to redistribute these changes.
     32  */
     33 
     34 #ifndef _RF__RF_HIST_H_
     35 #define _RF__RF_HIST_H_
     36 
     37 #include <dev/raidframe/raidframevar.h>
     38 
     39 #define RF_HIST_RESOLUTION   5
     40 #define RF_HIST_MIN_VAL      0
     41 #define RF_HIST_MAX_VAL      1000
     42 #define RF_HIST_RANGE        (RF_HIST_MAX_VAL - RF_HIST_MIN_VAL)
     43 #define RF_HIST_NUM_BUCKETS  (RF_HIST_RANGE / RF_HIST_RESOLUTION + 1)
     44 
     45 typedef RF_uint32 RF_Hist_t;
     46 
     47 #define RF_HIST_ADD(_hist_,_val_) { \
     48 	RF_Hist_t val; \
     49 	val = ((RF_Hist_t)(_val_)) / 1000; \
     50 	if (val >= RF_HIST_MAX_VAL) \
     51 		_hist_[RF_HIST_NUM_BUCKETS-1]++; \
     52 	else \
     53 		_hist_[(val - RF_HIST_MIN_VAL) / RF_HIST_RESOLUTION]++; \
     54 }
     55 
     56 #endif				/* !_RF__RF_HIST_H_ */
     57