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/*-
* Copyright (c) 2014
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/sysctl.h>
#include <string.h>
#include "systat.h"
#include "extern.h"
struct zfield{
uint64_t arcstats;
uint64_t arcstats_demand_data;
uint64_t arcstats_demand_metadata;
uint64_t arcstats_prefetch_data;
uint64_t arcstats_prefetch_metadata;
uint64_t zfetchstats;
uint64_t arcstats_l2;
uint64_t vdev_cache_stats;
};
static struct zarcstats {
struct zfield hits;
struct zfield misses;
} curstat, initstat, oldstat;
static void
getinfo(struct zarcstats *ls);
WINDOW *
openzarc(void)
{
return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
}
void
closezarc(WINDOW *w)
{
if (w == NULL)
return;
wclear(w);
wrefresh(w);
delwin(w);
}
void
labelzarc(void)
{
wmove(wnd, 0, 0); wclrtoeol(wnd);
mvwprintw(wnd, 0, 31+1, "%4.4s %7.7s %7.7s %12.12s %12.12s",
"rate", "hits", "misses", "total hits", "total misses");
#define L(row, str) mvwprintw(wnd, row, 5, str); \
mvwprintw(wnd, row, 31, ":"); \
mvwprintw(wnd, row, 31+4, "%%")
L(1, "arcstats");
L(2, "arcstats.demand_data");
L(3, "arcstats.demand_metadata");
L(4, "arcstats.prefetch_data");
L(5, "arcstats.prefetch_metadata");
L(6, "zfetchstats");
L(7, "arcstats.l2");
L(8, "vdev_cache_stats");
#undef L
}
static int calc(uint64_t hits, uint64_t misses)
{
if( hits )
return 100 * hits / ( hits + misses );
else
return 0;
}
static void
domode(struct zarcstats *delta, struct zarcstats *rate)
{
#define DO(stat) \
delta->hits.stat = (curstat.hits.stat - oldstat.hits.stat); \
delta->misses.stat = (curstat.misses.stat - oldstat.misses.stat); \
rate->hits.stat = calc(delta->hits.stat, delta->misses.stat)
DO(arcstats);
DO(arcstats_demand_data);
DO(arcstats_demand_metadata);
DO(arcstats_prefetch_data);
DO(arcstats_prefetch_metadata);
DO(zfetchstats);
DO(arcstats_l2);
DO(vdev_cache_stats);
DO(arcstats);
DO(arcstats_demand_data);
DO(arcstats_demand_metadata);
DO(arcstats_prefetch_data);
DO(arcstats_prefetch_metadata);
DO(zfetchstats);
DO(arcstats_l2);
DO(vdev_cache_stats);
#undef DO
}
void
showzarc(void)
{
struct zarcstats delta, rate;
memset(&delta, 0, sizeof delta);
memset(&rate, 0, sizeof rate);
domode(&delta, &rate);
#define DO(stat, row, col, fmt) \
mvwprintw(wnd, row, col, fmt, stat)
#define R(row, stat) DO(rate.hits.stat, row, 31+1, "%3lu")
#define H(row, stat) DO(delta.hits.stat, row, 31+1+5, "%7lu"); \
DO(curstat.hits.stat, row, 31+1+5+8+8, "%12lu")
#define M(row, stat) DO(delta.misses.stat, row, 31+1+5+8, "%7lu"); \
DO(curstat.misses.stat, row, 31+1+5+8+8+13, "%12lu")
#define E(row, stat) R(row, stat); H(row, stat); M(row, stat);
E(1, arcstats);
E(2, arcstats_demand_data);
E(3, arcstats_demand_metadata);
E(4, arcstats_prefetch_data);
E(5, arcstats_prefetch_metadata);
E(6, zfetchstats);
E(7, arcstats_l2);
E(8, vdev_cache_stats);
#undef DO
#undef E
#undef M
#undef H
#undef R
}
int
initzarc(void)
{
getinfo(&initstat);
curstat = oldstat = initstat;
return 1;
}
void
resetzarc(void)
{
initzarc();
}
static void
getinfo(struct zarcstats *ls)
{
size_t size = sizeof( ls->hits.arcstats );
if ( sysctlbyname("kstat.zfs.misc.arcstats.hits",
&ls->hits.arcstats, &size, NULL, 0 ) != 0 )
return;
GETSYSCTL("kstat.zfs.misc.arcstats.misses",
ls->misses.arcstats);
GETSYSCTL("kstat.zfs.misc.arcstats.demand_data_hits",
ls->hits.arcstats_demand_data);
GETSYSCTL("kstat.zfs.misc.arcstats.demand_data_misses",
ls->misses.arcstats_demand_data);
GETSYSCTL("kstat.zfs.misc.arcstats.demand_metadata_hits",
ls->hits.arcstats_demand_metadata);
GETSYSCTL("kstat.zfs.misc.arcstats.demand_metadata_misses",
ls->misses.arcstats_demand_metadata);
GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_data_hits",
ls->hits.arcstats_prefetch_data);
GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_data_misses",
ls->misses.arcstats_prefetch_data);
GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_metadata_hits",
ls->hits.arcstats_prefetch_metadata);
GETSYSCTL("kstat.zfs.misc.arcstats.prefetch_metadata_misses",
ls->misses.arcstats_prefetch_metadata);
GETSYSCTL("kstat.zfs.misc.zfetchstats.hits",
ls->hits.zfetchstats);
GETSYSCTL("kstat.zfs.misc.zfetchstats.misses",
ls->misses.zfetchstats);
GETSYSCTL("kstat.zfs.misc.arcstats.l2_hits",
ls->hits.arcstats_l2);
GETSYSCTL("kstat.zfs.misc.arcstats.l2_misses",
ls->misses.arcstats_l2);
GETSYSCTL("kstat.zfs.misc.vdev_cache_stats.hits",
ls->hits.vdev_cache_stats);
GETSYSCTL("kstat.zfs.misc.vdev_cache_stats.misses",
ls->misses.vdev_cache_stats);
}
void
fetchzarc(void)
{
oldstat = curstat;
getinfo(&curstat);
}
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