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 * 3. 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("$FreeBSD$");
32
33 #include <sys/types.h>
34 #include <sys/sysctl.h>
35
36 #include <inttypes.h>
37 #include <string.h>
38
39 #include "systat.h"
40 #include "extern.h"
41
42 struct zfield{
43 uint64_t arcstats;
44 uint64_t arcstats_demand_data;
45 uint64_t arcstats_demand_metadata;
46 uint64_t arcstats_prefetch_data;
47 uint64_t arcstats_prefetch_metadata;
48 uint64_t zfetchstats;
49 uint64_t arcstats_l2;
50 uint64_t vdev_cache_stats;
51 };
52
53 static struct zarcstats {
54 struct zfield hits;
55 struct zfield misses;
56 } curstat, initstat, oldstat;
57
58 static void
59 getinfo(struct zarcstats *ls);
60
61 WINDOW *
openzarc(void)62 openzarc(void)
63 {
64 return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
65 }
66
67 void
closezarc(WINDOW * w)68 closezarc(WINDOW *w)
69 {
70 if (w == NULL)
71 return;
72 wclear(w);
73 wrefresh(w);
74 delwin(w);
75 }
76
77 void
labelzarc(void)78 labelzarc(void)
79 {
80 wmove(wnd, 0, 0); wclrtoeol(wnd);
81 mvwprintw(wnd, 0, 31+1, "%4.4s %7.7s %7.7s %12.12s %12.12s",
82 "rate", "hits", "misses", "total hits", "total misses");
83 #define L(row, str) mvwprintw(wnd, row, 5, str); \
84 mvwprintw(wnd, row, 31, ":"); \
85 mvwprintw(wnd, row, 31+4, "%%")
86 L(1, "arcstats");
87 L(2, "arcstats.demand_data");
88 L(3, "arcstats.demand_metadata");
89 L(4, "arcstats.prefetch_data");
90 L(5, "arcstats.prefetch_metadata");
91 L(6, "zfetchstats");
92 L(7, "arcstats.l2");
93 L(8, "vdev_cache_stats");
94 #undef L
95 }
96
calc(uint64_t hits,uint64_t misses)97 static int calc(uint64_t hits, uint64_t misses)
98 {
99 if( hits )
100 return 100 * hits / ( hits + misses );
101 else
102 return 0;
103 }
104
105 static void
domode(struct zarcstats * delta,struct zarcstats * rate)106 domode(struct zarcstats *delta, struct zarcstats *rate)
107 {
108 #define DO(stat) \
109 delta->hits.stat = (curstat.hits.stat - oldstat.hits.stat); \
110 delta->misses.stat = (curstat.misses.stat - oldstat.misses.stat); \
111 rate->hits.stat = calc(delta->hits.stat, delta->misses.stat)
112 DO(arcstats);
113 DO(arcstats_demand_data);
114 DO(arcstats_demand_metadata);
115 DO(arcstats_prefetch_data);
116 DO(arcstats_prefetch_metadata);
117 DO(zfetchstats);
118 DO(arcstats_l2);
119 DO(vdev_cache_stats);
120 DO(arcstats);
121 DO(arcstats_demand_data);
122 DO(arcstats_demand_metadata);
123 DO(arcstats_prefetch_data);
124 DO(arcstats_prefetch_metadata);
125 DO(zfetchstats);
126 DO(arcstats_l2);
127 DO(vdev_cache_stats);
128 #undef DO
129 }
130
131 void
showzarc(void)132 showzarc(void)
133 {
134 struct zarcstats delta, rate;
135
136 memset(&delta, 0, sizeof delta);
137 memset(&rate, 0, sizeof rate);
138
139 domode(&delta, &rate);
140
141 #define DO(stat, row, col, fmt) \
142 mvwprintw(wnd, row, col, fmt, stat)
143 #define R(row, stat) DO(rate.hits.stat, row, 31+1, "%3"PRIu64)
144 #define H(row, stat) DO(delta.hits.stat, row, 31+1+5, "%7"PRIu64); \
145 DO(curstat.hits.stat, row, 31+1+5+8+8, "%12"PRIu64)
146 #define M(row, stat) DO(delta.misses.stat, row, 31+1+5+8, "%7"PRIu64); \
147 DO(curstat.misses.stat, row, 31+1+5+8+8+13, "%12"PRIu64)
148 #define E(row, stat) R(row, stat); H(row, stat); M(row, stat);
149 E(1, arcstats);
150 E(2, arcstats_demand_data);
151 E(3, arcstats_demand_metadata);
152 E(4, arcstats_prefetch_data);
153 E(5, arcstats_prefetch_metadata);
154 E(6, zfetchstats);
155 E(7, arcstats_l2);
156 E(8, vdev_cache_stats);
157 #undef DO
158 #undef E
159 #undef M
160 #undef H
161 #undef R
162 }
163
164 int
initzarc(void)165 initzarc(void)
166 {
167 getinfo(&initstat);
168 curstat = oldstat = initstat;
169 return 1;
170 }
171
172 void
resetzarc(void)173 resetzarc(void)
174 {
175 initzarc();
176 }
177
178 static void
getinfo(struct zarcstats * ls)179 getinfo(struct zarcstats *ls)
180 {
181 size_t size = sizeof( ls->hits.arcstats );
182 if ( sysctlbyname("kstat.zfs.misc.arcstats.hits",
183 &ls->hits.arcstats, &size, NULL, 0 ) != 0 )
184 return;
185 GETSYSCTL("kstat.zfs.misc.arcstats.misses",
186 ls->misses.arcstats);
187 GETSYSCTL("kstat.zfs.misc.arcstats.demand_data_hits",
188 ls->hits.arcstats_demand_data);
189 GETSYSCTL("kstat.zfs.misc.arcstats.demand_data_misses",
190 ls->misses.arcstats_demand_data);
191 GETSYSCTL("kstat.zfs.misc.arcstats.demand_metadata_hits",
192 ls->hits.arcstats_demand_metadata);
193 GETSYSCTL("kstat.zfs.misc.arcstats.demand_metadata_misses",
194 ls->misses.arcstats_demand_metadata);
195 GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_data_hits",
196 ls->hits.arcstats_prefetch_data);
197 GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_data_misses",
198 ls->misses.arcstats_prefetch_data);
199 GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_metadata_hits",
200 ls->hits.arcstats_prefetch_metadata);
201 GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_metadata_misses",
202 ls->misses.arcstats_prefetch_metadata);
203 GETSYSCTL("kstat.zfs.misc.zfetchstats.hits",
204 ls->hits.zfetchstats);
205 GETSYSCTL("kstat.zfs.misc.zfetchstats.misses",
206 ls->misses.zfetchstats);
207 GETSYSCTL("kstat.zfs.misc.arcstats.l2_hits",
208 ls->hits.arcstats_l2);
209 GETSYSCTL("kstat.zfs.misc.arcstats.l2_misses",
210 ls->misses.arcstats_l2);
211 GETSYSCTL("kstat.zfs.misc.vdev_cache_stats.hits",
212 ls->hits.vdev_cache_stats);
213 GETSYSCTL("kstat.zfs.misc.vdev_cache_stats.misses",
214 ls->misses.vdev_cache_stats);
215 }
216
217 void
fetchzarc(void)218 fetchzarc(void)
219 {
220 oldstat = curstat;
221 getinfo(&curstat);
222 }
223