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_ */