378 lines
12 KiB
C
378 lines
12 KiB
C
/*
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* slabtop.c - utility to display kernel slab information.
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*
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* Chris Rivera <cmrivera@ufl.edu>
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* Robert Love <rml@tech9.net>
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*
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* Copyright (C) 2003 Chris Rivera
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <ctype.h>
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#include <errno.h>
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#include <getopt.h>
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#include <locale.h>
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#include <ncurses.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <sys/ioctl.h>
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#include <sys/select.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "c.h"
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#include "fileutils.h"
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#include "nls.h"
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#include "strutils.h"
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#include <proc/procps.h>
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#define DEFAULT_SORT SLAB_NUM_OBJS
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#define CHAINS_ALLOC 150
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#define MAXTBL(t) (int)( sizeof(t) / sizeof(t[0]) )
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static unsigned short Cols, Rows;
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static struct termios Saved_tty;
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static long Delay = 3;
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static int Run_once = 0;
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static struct slabinfo_info *Slab_info;
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enum slabinfo_item Sort_item = DEFAULT_SORT;
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enum slabinfo_sort_order Sort_Order = SLABINFO_SORT_DESCEND;
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enum slabinfo_item Node_items[] = {
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SLAB_NUM_OBJS, SLAB_ACTIVE_OBJS, SLAB_PERCENT_USED,
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SLAB_OBJ_SIZE, SLAB_NUMS_SLABS, SLAB_OBJ_PER_SLAB,
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SLAB_SIZE_TOTAL, SLAB_NAME,
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/* next 2 are sortable but are not displayable,
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thus they need not be represented in the Relative_enums */
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SLAB_PAGES_PER_SLAB, SLAB_ACTIVE_SLABS };
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enum Relative_node {
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nod_OBJS, nod_AOBJS, nod_USE, nod_OSIZE,
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nod_SLABS, nod_OPS, nod_SIZE, nod_NAME };
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#define MAX_ITEMS (int)(sizeof(Node_items) / sizeof(Node_items[0]))
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#define PRINT_line(fmt, ...) if (Run_once) printf(fmt, __VA_ARGS__); else printw(fmt, __VA_ARGS__)
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/*
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* term_resize - set the globals 'Cols' and 'Rows' to the current terminal size
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*/
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static void term_resize (int unusused __attribute__ ((__unused__)))
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{
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struct winsize ws;
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if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) != -1) && ws.ws_row > 10) {
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Cols = ws.ws_col;
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Rows = ws.ws_row;
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} else {
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Cols = 80;
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Rows = 24;
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}
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}
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static void sigint_handler (int unused __attribute__ ((__unused__)))
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{
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Delay = 0;
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}
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static void __attribute__((__noreturn__)) usage (FILE *out)
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{
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fputs(USAGE_HEADER, out);
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fprintf(out, _(" %s [options]\n"), program_invocation_short_name);
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fputs(USAGE_OPTIONS, out);
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fputs(_(" -d, --delay <secs> delay updates\n"), out);
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fputs(_(" -o, --once only display once, then exit\n"), out);
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fputs(_(" -s, --sort <char> specify sort criteria by character (see below)\n"), out);
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fputs(USAGE_SEPARATOR, out);
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fputs(USAGE_HELP, out);
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fputs(USAGE_VERSION, out);
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fputs(_("\nThe following are valid sort criteria:\n"), out);
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fputs(_(" a: sort by number of active objects\n"), out);
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fputs(_(" b: sort by objects per slab\n"), out);
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fputs(_(" c: sort by cache size\n"), out);
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fputs(_(" l: sort by number of slabs\n"), out);
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fputs(_(" v: sort by (non display) number of active slabs\n"), out);
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fputs(_(" n: sort by name\n"), out);
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fputs(_(" o: sort by number of objects (the default)\n"), out);
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fputs(_(" p: sort by (non display) pages per slab\n"), out);
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fputs(_(" s: sort by object size\n"), out);
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fputs(_(" u: sort by cache utilization\n"), out);
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fprintf(out, USAGE_MAN_TAIL("slabtop(1)"));
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exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
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}
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static void set_sort_stuff (const char key)
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{
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Sort_item = DEFAULT_SORT;
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Sort_Order = SLABINFO_SORT_DESCEND;
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switch (tolower(key)) {
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case 'n':
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Sort_item = SLAB_NAME;
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Sort_Order = SLABINFO_SORT_ASCEND;
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break;
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case 'o':
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Sort_item = SLAB_NUM_OBJS;
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break;
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case 'a':
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Sort_item = SLAB_ACTIVE_OBJS;
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break;
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case 's':
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Sort_item = SLAB_OBJ_SIZE;
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break;
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case 'b':
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Sort_item = SLAB_OBJ_PER_SLAB;
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break;
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case 'p':
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Sort_item = SLAB_PAGES_PER_SLAB;
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break;
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case 'l':
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Sort_item = SLAB_NUMS_SLABS;
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break;
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case 'v':
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Sort_item = SLAB_ACTIVE_SLABS;
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break;
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case 'c':
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Sort_item = SLAB_SIZE_TOTAL;
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break;
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case 'u':
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Sort_item = SLAB_PERCENT_USED;
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break;
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default:
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break;
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}
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}
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static void parse_opts (int argc, char **argv)
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{
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static const struct option longopts[] = {
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{ "delay", required_argument, NULL, 'd' },
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{ "sort", required_argument, NULL, 's' },
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{ "once", no_argument, NULL, 'o' },
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, 'V' },
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{ NULL, 0, NULL, 0 }};
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int o;
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while ((o = getopt_long(argc, argv, "d:s:ohV", longopts, NULL)) != -1) {
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switch (o) {
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case 'd':
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errno = 0;
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Delay = strtol_or_err(optarg, _("illegal delay"));
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if (Delay < 1)
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xerrx(EXIT_FAILURE, _("delay must be positive integer"));
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break;
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case 's':
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set_sort_stuff(optarg[0]);
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break;
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case 'o':
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Run_once=1;
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Delay = 0;
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break;
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case 'V':
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printf(PROCPS_NG_VERSION);
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exit(EXIT_SUCCESS);
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case 'h':
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usage(stdout);
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default:
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usage(stderr);
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}
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}
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}
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static void print_summary (void)
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{
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#define totalVAL(e,t) SLABINFO_VAL(e, t, p, Slab_info)
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enum slabinfo_item items[] = {
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SLABS_ACTIVE_OBJS, SLABS_NUM_OBJS,
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SLABS_ACTIVE_SLABS, SLABS_NUMS_SLABS,
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SLABS_CACHES_ACTIVE, SLABS_CACHES_TOTAL,
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SLABS_SIZE_ACTIVE, SLABS_SIZE_TOTAL,
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SLABS_OBJ_SIZE_MIN, SLABS_OBJ_SIZE_AVG,
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SLABS_OBJ_SIZE_MAX
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};
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enum rel_items {
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tot_AOBJS, tot_OBJS, tot_ASLABS, tot_SLABS,
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tot_ACACHES, tot_CACHES, tot_ACTIVE, tot_TOTAL,
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tot_MIN, tot_AVG, tot_MAX
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};
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struct slabinfo_stack *p;
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if (!(p = procps_slabinfo_select(Slab_info, items, MAXTBL(items))))
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xerrx(EXIT_FAILURE, _("Error getting slab summary results"));
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PRINT_line(" %-35s: %u / %u (%.1f%%)\n"
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, /* Translation Hint: Next five strings must not
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* exceed a length of 35 characters. */
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/* xgettext:no-c-format */
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_("Active / Total Objects (% used)")
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, totalVAL(tot_AOBJS, u_int)
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, totalVAL(tot_OBJS, u_int)
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, 100.0 * totalVAL(tot_AOBJS, u_int) / totalVAL(tot_OBJS, u_int));
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PRINT_line(" %-35s: %u / %u (%.1f%%)\n"
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, /* xgettext:no-c-format */
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_("Active / Total Slabs (% used)")
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, totalVAL(tot_ASLABS, u_int)
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, totalVAL(tot_SLABS, u_int)
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, 100.0 * totalVAL(tot_ASLABS, u_int) / totalVAL(tot_SLABS, u_int));
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PRINT_line(" %-35s: %u / %u (%.1f%%)\n"
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, /* xgettext:no-c-format */
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_("Active / Total Caches (% used)")
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, totalVAL(tot_ACACHES, u_int)
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, totalVAL(tot_CACHES, u_int)
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, 100.0 * totalVAL(tot_ACACHES, u_int) / totalVAL(tot_CACHES, u_int));
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PRINT_line(" %-35s: %.2fK / %.2fK (%.1f%%)\n"
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, /* xgettext:no-c-format */
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_("Active / Total Size (% used)")
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, totalVAL(tot_ACTIVE, ul_int) / 1024.0
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, totalVAL(tot_TOTAL, ul_int) / 1024.0
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, 100.0 * totalVAL(tot_ACTIVE, ul_int) / totalVAL(tot_TOTAL, ul_int));
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PRINT_line(" %-35s: %.2fK / %.2fK / %.2fK\n\n"
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, _("Minimum / Average / Maximum Object")
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, totalVAL(tot_MIN, u_int) / 1024.0
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, totalVAL(tot_AVG, u_int) / 1024.0
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, totalVAL(tot_MAX, u_int) / 1024.0);
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#undef totalVAL
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}
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static void print_headings (void)
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{
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/* Translation Hint: Please keep alignment of the
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* following intact. */
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PRINT_line("%-78s\n", _(" OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME"));
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}
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static void print_details (struct slabinfo_stack *stack)
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{
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#define nodeVAL(e,t) SLABINFO_VAL(e, t, stack, Slab_info)
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PRINT_line("%6u %6u %3u%% %7.2fK %6u %8u %9luK %-23s\n"
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, nodeVAL(nod_OBJS, u_int)
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, nodeVAL(nod_AOBJS, u_int)
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, nodeVAL(nod_USE, u_int)
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, nodeVAL(nod_OSIZE, u_int) / 1024.0
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, nodeVAL(nod_SLABS, u_int)
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, nodeVAL(nod_OPS, u_int)
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, nodeVAL(nod_SIZE, ul_int) / 1024
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, nodeVAL(nod_NAME, str));
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return;
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#undef nodeVAL
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}
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int main(int argc, char *argv[])
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{
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int is_tty, rc = EXIT_SUCCESS;
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unsigned short old_rows;
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#ifdef HAVE_PROGRAM_INVOCATION_NAME
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program_invocation_name = program_invocation_short_name;
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#endif
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setlocale (LC_ALL, "");
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bindtextdomain(PACKAGE, LOCALEDIR);
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textdomain(PACKAGE);
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atexit(close_stdout);
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parse_opts(argc, argv);
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if (procps_slabinfo_new(&Slab_info) < 0)
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xerr(EXIT_FAILURE, _("Unable to create slabinfo structure"));
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if (!Run_once) {
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is_tty = isatty(STDIN_FILENO);
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if (is_tty && tcgetattr(STDIN_FILENO, &Saved_tty) == -1)
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xwarn(_("terminal setting retrieval"));
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old_rows = Rows;
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term_resize(0);
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initscr();
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resizeterm(Rows, Cols);
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signal(SIGWINCH, term_resize);
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signal(SIGINT, sigint_handler);
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}
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do {
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struct slabinfo_reap *reaped;
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struct timeval tv;
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fd_set readfds;
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int i;
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if (!(reaped = procps_slabinfo_reap(Slab_info, Node_items, MAXTBL(Node_items)))) {
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xwarn(_("Unable to get slabinfo node data"));
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rc = EXIT_FAILURE;
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break;
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}
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if (!(procps_slabinfo_sort(Slab_info, reaped->stacks, reaped->total, Sort_item, Sort_Order))) {
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xwarn(_("Unable to sort slab nodes"));
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rc = EXIT_FAILURE;
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break;
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}
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if (Run_once) {
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print_summary();
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print_headings();
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for (i = 0; i < reaped->total; i++)
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print_details(reaped->stacks[i]);
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break;
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}
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if (old_rows != Rows) {
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resizeterm(Rows, Cols);
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old_rows = Rows;
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}
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move(0, 0);
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print_summary();
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attron(A_REVERSE);
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print_headings();
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attroff(A_REVERSE);
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for (i = 0; i < Rows - 8 && i < reaped->total; i++)
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print_details(reaped->stacks[i]);
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refresh();
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FD_ZERO(&readfds);
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FD_SET(STDIN_FILENO, &readfds);
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tv.tv_sec = Delay;
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tv.tv_usec = 0;
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if (select(STDOUT_FILENO, &readfds, NULL, NULL, &tv) > 0) {
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char c;
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if (read(STDIN_FILENO, &c, 1) != 1
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|| (c == 'Q' || c == 'q'))
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break;
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set_sort_stuff(c);
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}
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// made zero by sigint_handler()
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} while (Delay);
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if (!Run_once) {
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if (is_tty)
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tcsetattr(STDIN_FILENO, TCSAFLUSH, &Saved_tty);
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endwin();
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}
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procps_slabinfo_unref(&Slab_info);
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return rc;
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}
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