1/*-
2 * Copyright (c) 2014 - 2017, 2019 Yoshihiro Ota
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of the University nor the names of its contributors
13 *    may be used to endorse or promote products derived from this software
14 *    without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD$");
31
32#include <sys/types.h>
33#include <sys/sysctl.h>
34
35#include <inttypes.h>
36#include <string.h>
37#include <err.h>
38#include <libutil.h>
39
40#include "systat.h"
41#include "extern.h"
42#include "devs.h"
43
44struct zfield {
45	uint64_t arcstats;
46	uint64_t arcstats_demand_data;
47	uint64_t arcstats_demand_metadata;
48	uint64_t arcstats_prefetch_data;
49	uint64_t arcstats_prefetch_metadata;
50	uint64_t zfetchstats;
51	uint64_t arcstats_l2;
52	uint64_t vdev_cache_stats;
53};
54
55static struct zarcstats {
56	struct zfield hits;
57	struct zfield misses;
58} curstat, initstat, oldstat;
59
60struct zarcrates {
61	struct zfield current;
62	struct zfield total;
63};
64
65static void
66getinfo(struct zarcstats *ls);
67
68WINDOW *
69openzarc(void)
70{
71
72	return (subwin(stdscr, LINES - 3 - 1, 0, MAINWIN_ROW, 0));
73}
74
75void
76closezarc(WINDOW *w)
77{
78
79	if (w == NULL)
80		return;
81	wclear(w);
82	wrefresh(w);
83	delwin(w);
84}
85
86void
87labelzarc(void)
88{
89	int row = 1;
90
91	wmove(wnd, 0, 0); wclrtoeol(wnd);
92	mvwprintw(wnd, 0, 31+1, "%4.4s %6.6s %6.6s | Total %4.4s %6.6s %6.6s",
93		"Rate", "Hits", "Misses", "Rate", "Hits", "Misses");
94#define L(str) mvwprintw(wnd, row++, 5, \
95		"%-26.26s:   %%               |          %%", #str)
96	L(arcstats);
97	L(arcstats.demand_data);
98	L(arcstats.demand_metadata);
99	L(arcstats.prefetch_data);
100	L(arcstats.prefetch_metadata);
101	L(zfetchstats);
102	L(arcstats.l2);
103	L(vdev_cache_stats);
104#undef L
105	dslabel(12, 0, 18);
106}
107
108static int
109calc_rate(uint64_t hits, uint64_t misses)
110{
111    if(hits)
112	return 100 * hits / (hits + misses);
113    else
114	return 0;
115}
116
117static void
118domode(struct zarcstats *delta, struct zarcrates *rate)
119{
120#define DO(stat) \
121	delta->hits.stat = (curstat.hits.stat - oldstat.hits.stat); \
122	delta->misses.stat = (curstat.misses.stat - oldstat.misses.stat); \
123	rate->current.stat = calc_rate(delta->hits.stat, delta->misses.stat); \
124	rate->total.stat = calc_rate(curstat.hits.stat, curstat.misses.stat)
125	DO(arcstats);
126	DO(arcstats_demand_data);
127	DO(arcstats_demand_metadata);
128	DO(arcstats_prefetch_data);
129	DO(arcstats_prefetch_metadata);
130	DO(zfetchstats);
131	DO(arcstats_l2);
132	DO(vdev_cache_stats);
133	DO(arcstats);
134	DO(arcstats_demand_data);
135	DO(arcstats_demand_metadata);
136	DO(arcstats_prefetch_data);
137	DO(arcstats_prefetch_metadata);
138	DO(zfetchstats);
139	DO(arcstats_l2);
140	DO(vdev_cache_stats);
141#undef DO
142}
143
144void
145showzarc(void)
146{
147	int row = 1;
148	struct zarcstats delta = {};
149	struct zarcrates rate = {};
150
151	domode(&delta, &rate);
152
153#define DO(stat, col, width) \
154	sysputuint64(wnd, row, col, width, stat, HN_DIVISOR_1000)
155#define	RATES(stat) mvwprintw(wnd, row, 31+1, "%3"PRIu64, rate.current.stat);\
156	mvwprintw(wnd, row, 31+1+5+7+7+8, "%3"PRIu64, rate.total.stat)
157#define	HITS(stat) DO(delta.hits.stat, 31+1+5, 6); \
158	DO(curstat.hits.stat, 31+1+5+7+7+8+5, 6)
159#define	MISSES(stat) DO(delta.misses.stat, 31+1+5+7, 6); \
160	DO(curstat.misses.stat, 31+1+5+7+7+8+5+7, 6)
161#define	E(stat) RATES(stat); HITS(stat); MISSES(stat); ++row
162	E(arcstats);
163	E(arcstats_demand_data);
164	E(arcstats_demand_metadata);
165	E(arcstats_prefetch_data);
166	E(arcstats_prefetch_metadata);
167	E(zfetchstats);
168	E(arcstats_l2);
169	E(vdev_cache_stats);
170#undef DO
171#undef E
172#undef MISSES
173#undef HITS
174#undef RATES
175	dsshow(12, 0, 18, &cur_dev, &last_dev);
176}
177
178int
179initzarc(void)
180{
181	dsinit(12);
182	getinfo(&initstat);
183	curstat = oldstat = initstat;
184
185	return 1;
186}
187
188void
189resetzarc(void)
190{
191
192	initzarc();
193}
194
195static void
196getinfo(struct zarcstats *ls)
197{
198	struct devinfo *tmp_dinfo;
199
200	tmp_dinfo = last_dev.dinfo;
201	last_dev.dinfo = cur_dev.dinfo;
202	cur_dev.dinfo = tmp_dinfo;
203
204	last_dev.snap_time = cur_dev.snap_time;
205	dsgetinfo(&cur_dev);
206
207	size_t size = sizeof(ls->hits.arcstats);
208	if (sysctlbyname("kstat.zfs.misc.arcstats.hits",
209		&ls->hits.arcstats, &size, NULL, 0) != 0)
210		return;
211	GETSYSCTL("kstat.zfs.misc.arcstats.misses",
212		ls->misses.arcstats);
213	GETSYSCTL("kstat.zfs.misc.arcstats.demand_data_hits",
214		ls->hits.arcstats_demand_data);
215	GETSYSCTL("kstat.zfs.misc.arcstats.demand_data_misses",
216		ls->misses.arcstats_demand_data);
217	GETSYSCTL("kstat.zfs.misc.arcstats.demand_metadata_hits",
218		ls->hits.arcstats_demand_metadata);
219	GETSYSCTL("kstat.zfs.misc.arcstats.demand_metadata_misses",
220		ls->misses.arcstats_demand_metadata);
221	GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_data_hits",
222		ls->hits.arcstats_prefetch_data);
223	GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_data_misses",
224		ls->misses.arcstats_prefetch_data);
225	GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_metadata_hits",
226		ls->hits.arcstats_prefetch_metadata);
227	GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_metadata_misses",
228		ls->misses.arcstats_prefetch_metadata);
229	GETSYSCTL("kstat.zfs.misc.zfetchstats.hits",
230		ls->hits.zfetchstats);
231	GETSYSCTL("kstat.zfs.misc.zfetchstats.misses",
232		ls->misses.zfetchstats);
233	GETSYSCTL("kstat.zfs.misc.arcstats.l2_hits",
234		ls->hits.arcstats_l2);
235	GETSYSCTL("kstat.zfs.misc.arcstats.l2_misses",
236		ls->misses.arcstats_l2);
237	GETSYSCTL("kstat.zfs.misc.vdev_cache_stats.hits",
238		ls->hits.vdev_cache_stats);
239	GETSYSCTL("kstat.zfs.misc.vdev_cache_stats.misses",
240		ls->misses.vdev_cache_stats);
241}
242
243void
244fetchzarc(void)
245{
246
247	oldstat = curstat;
248	getinfo(&curstat);
249}
250