zarc.c revision 288306 
1/*-
2 * Copyright (c) 2014
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: head/usr.bin/systat/zarc.c 288306 2015-09-27 09:15:54Z mr $");
32
33#include <sys/types.h>
34#include <sys/sysctl.h>
35
36#include <string.h>
37
38#include "systat.h"
39#include "extern.h"
40
41struct zfield{
42	uint64_t arcstats;
43	uint64_t arcstats_demand_data;
44	uint64_t arcstats_demand_metadata;
45	uint64_t arcstats_prefetch_data;
46	uint64_t arcstats_prefetch_metadata;
47	uint64_t zfetchstats;
48	uint64_t arcstats_l2;
49	uint64_t vdev_cache_stats;
50};
51
52static struct zarcstats {
53	struct zfield hits;
54	struct zfield misses;
55} curstat, initstat, oldstat;
56
57static void
58getinfo(struct zarcstats *ls);
59
60WINDOW *
61openzarc(void)
62{
63	return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
64}
65
66void
67closezarc(WINDOW *w)
68{
69	if (w == NULL)
70		return;
71	wclear(w);
72	wrefresh(w);
73	delwin(w);
74}
75
76void
77labelzarc(void)
78{
79	wmove(wnd, 0, 0); wclrtoeol(wnd);
80	mvwprintw(wnd, 0, 31+1, "%4.4s %7.7s %7.7s %12.12s %12.12s",
81		"rate", "hits", "misses", "total hits", "total misses");
82#define L(row, str) mvwprintw(wnd, row, 5, str); \
83	mvwprintw(wnd, row, 31, ":"); \
84	mvwprintw(wnd, row, 31+4, "%%")
85	L(1, "arcstats");
86	L(2, "arcstats.demand_data");
87	L(3, "arcstats.demand_metadata");
88	L(4, "arcstats.prefetch_data");
89	L(5, "arcstats.prefetch_metadata");
90	L(6, "zfetchstats");
91	L(7, "arcstats.l2");
92	L(8, "vdev_cache_stats");
93#undef L
94}
95
96static int calc(uint64_t hits, uint64_t misses)
97{
98    if( hits )
99	return 100 * hits / ( hits + misses );
100    else
101	return 0;
102}
103
104static void
105domode(struct zarcstats *delta, struct zarcstats *rate)
106{
107#define DO(stat) \
108	delta->hits.stat = (curstat.hits.stat - oldstat.hits.stat); \
109	delta->misses.stat = (curstat.misses.stat - oldstat.misses.stat); \
110	rate->hits.stat = calc(delta->hits.stat, delta->misses.stat)
111	DO(arcstats);
112	DO(arcstats_demand_data);
113	DO(arcstats_demand_metadata);
114	DO(arcstats_prefetch_data);
115	DO(arcstats_prefetch_metadata);
116	DO(zfetchstats);
117	DO(arcstats_l2);
118	DO(vdev_cache_stats);
119	DO(arcstats);
120	DO(arcstats_demand_data);
121	DO(arcstats_demand_metadata);
122	DO(arcstats_prefetch_data);
123	DO(arcstats_prefetch_metadata);
124	DO(zfetchstats);
125	DO(arcstats_l2);
126	DO(vdev_cache_stats);
127#undef DO
128}
129
130void
131showzarc(void)
132{
133	struct zarcstats delta, rate;
134
135	memset(&delta, 0, sizeof delta);
136	memset(&rate, 0, sizeof rate);
137
138	domode(&delta, &rate);
139
140#define DO(stat, row, col, fmt) \
141	mvwprintw(wnd, row, col, fmt, stat)
142#define	R(row, stat) DO(rate.hits.stat, row, 31+1, "%3lu")
143#define	H(row, stat) DO(delta.hits.stat, row, 31+1+5, "%7lu"); \
144	DO(curstat.hits.stat, row, 31+1+5+8+8, "%12lu")
145#define	M(row, stat) DO(delta.misses.stat, row, 31+1+5+8, "%7lu"); \
146	DO(curstat.misses.stat, row, 31+1+5+8+8+13, "%12lu")
147#define	E(row, stat) R(row, stat); H(row, stat); M(row, stat);
148	E(1, arcstats);
149	E(2, arcstats_demand_data);
150	E(3, arcstats_demand_metadata);
151	E(4, arcstats_prefetch_data);
152	E(5, arcstats_prefetch_metadata);
153	E(6, zfetchstats);
154	E(7, arcstats_l2);
155	E(8, vdev_cache_stats);
156#undef DO
157#undef E
158#undef M
159#undef H
160#undef R
161}
162
163int
164initzarc(void)
165{
166	getinfo(&initstat);
167	curstat = oldstat = initstat;
168	return 1;
169}
170
171void
172resetzarc(void)
173{
174	initzarc();
175}
176
177static void
178getinfo(struct zarcstats *ls)
179{
180	size_t size = sizeof( ls->hits.arcstats );
181	if ( sysctlbyname("kstat.zfs.misc.arcstats.hits",
182		&ls->hits.arcstats, &size, NULL, 0 ) != 0 )
183		return;
184	GETSYSCTL("kstat.zfs.misc.arcstats.misses",
185		ls->misses.arcstats);
186	GETSYSCTL("kstat.zfs.misc.arcstats.demand_data_hits",
187		ls->hits.arcstats_demand_data);
188	GETSYSCTL("kstat.zfs.misc.arcstats.demand_data_misses",
189		ls->misses.arcstats_demand_data);
190	GETSYSCTL("kstat.zfs.misc.arcstats.demand_metadata_hits",
191		ls->hits.arcstats_demand_metadata);
192	GETSYSCTL("kstat.zfs.misc.arcstats.demand_metadata_misses",
193		ls->misses.arcstats_demand_metadata);
194	GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_data_hits",
195		ls->hits.arcstats_prefetch_data);
196	GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_data_misses",
197		ls->misses.arcstats_prefetch_data);
198	GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_metadata_hits",
199		ls->hits.arcstats_prefetch_metadata);
200	GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_metadata_misses",
201		ls->misses.arcstats_prefetch_metadata);
202	GETSYSCTL("kstat.zfs.misc.zfetchstats.hits",
203		ls->hits.zfetchstats);
204	GETSYSCTL("kstat.zfs.misc.zfetchstats.misses",
205		ls->misses.zfetchstats);
206	GETSYSCTL("kstat.zfs.misc.arcstats.l2_hits",
207		ls->hits.arcstats_l2);
208	GETSYSCTL("kstat.zfs.misc.arcstats.l2_misses",
209		ls->misses.arcstats_l2);
210	GETSYSCTL("kstat.zfs.misc.vdev_cache_stats.hits",
211		ls->hits.vdev_cache_stats);
212	GETSYSCTL("kstat.zfs.misc.vdev_cache_stats.misses",
213		ls->misses.vdev_cache_stats);
214}
215
216void
217fetchzarc(void)
218{
219	oldstat = curstat;
220	getinfo(&curstat);
221}
222