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/* Print vm statistics
Copyright (C) 1996 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <stdio.h>
#include <stddef.h>
#include <argp.h>
#include <error.h>
#include <string.h>
#include <mach.h>
#include <mach/vm_statistics.h>
struct field {
/* Name of the field; used for the option name. */
char *name;
/* A descriptive title used for long output format. */
char *desc;
/* Terse header used for the columnar style output. */
char *hdr;
/* Offset of the integer_t field in a vm_statistics structure */
int offs;
};
/* Returns the byte offset of the field FIELD in a vm_statistics structure. */
#define FOFFS(field) offsetof (struct vm_statistics, field)
/* vm_statistics fields we know about. */
static const struct field fields[] = {
{ "pagesize", "Pagesize", "pgsz", FOFFS (pagesize) },
{ "free", "Free pages", "free", FOFFS (free_count) },
{ "active", "Active pages", "actv", FOFFS (active_count) },
{ "inactive", "Inactive pages", "inac", FOFFS (inactive_count) },
{ "wired", "Wired pages", "wire", FOFFS (wire_count) },
{ "zero-filled", "Zeroed pages", "zeroed", FOFFS (zero_fill_count) },
{ "reactivations","Reactivations", "react", FOFFS (reactivations) },
{ "pageins", "Pageins", "pgins", FOFFS (pageins) },
{ "pageouts", "Pageouts", "pgouts", FOFFS (pageouts) },
{ "faults", "Faults", "pfaults", FOFFS (faults) },
{ "cow-faults", "Cow faults", "cowpfs", FOFFS (cow_faults) },
{ "cache-lookups","Cache lookups", "clkups", FOFFS (lookups) },
{ "cache-hits", "Cache hits", "chits", FOFFS (hits) },
{0}
};
static const struct argp_option options[] = {
{"terse", 't', 0, 0, "Use short one-line output format", 1 },
{"no-header", 'H', 0, 0, "Don't print a descriptive header line"},
{"prefix", 'p', 0, 0, "Always display a description before stats"},
{"no-prefix", 'P', 0, 0, "Never display a description before stats"},
/* A header for all the individual field options. */
{ 0,0,0,0, "Selecting which statistics to show:", 2},
{0}
};
static const char *args_doc = 0;
static const char *doc = 0;
int
main (int argc, char **argv)
{
error_t err;
const struct field *field;
struct vm_statistics stats;
int num_fields = 0; /* Number of vm_fields known. */
unsigned long output_fields = 0; /* A bit per field, from 0. */
int terse = 0, print_heading = 1, print_prefix = -1;
/* Parse our options... */
error_t parse_opt (int key, char *arg, struct argp_state *state)
{
if (key < 0)
/* A field option. */
output_fields |= (1 << (-1 - key));
else
switch (key)
{
case 't': terse = 1; break;
case 'p': print_prefix = 1; break;
case 'P': print_prefix = 0; break;
case 'H': print_heading = 0; break;
default: return EINVAL;
}
return 0;
}
struct argp_option *field_opts;
int field_opts_size;
struct argp field_argp = { 0, parse_opt };
const struct argp *parents[] = { &field_argp, 0 };
const struct argp argp = { options, parse_opt, args_doc, doc, parents };
/* See how many fields we know about. */
for (field = fields; field->name; field++)
num_fields++;
/* Construct an options vector for them. */
field_opts_size = ((num_fields + 1) * sizeof (struct argp_option));
field_opts = alloca (field_opts_size);
bzero (field_opts, field_opts_size);
for (field = fields; field->name; field++)
{
int which = field - fields;
struct argp_option *opt = &field_opts[which];
opt->name = field->name;
opt->key = -1 - which; /* options are numbered -1 ... -(N - 1). */
opt->doc = field->desc;
opt->group = 2;
}
/* No need to terminate FIELD_OPTS because the bzero above's done so. */
field_argp.options = field_opts;
/* Parse our arguments. */
argp_parse (&argp, argc, argv, 0, 0);
if (output_fields == 0)
output_fields = ~0; /* By default, show all fields. */
/* Actually fetch the statistics. */
err = vm_statistics (mach_task_self (), &stats);
if (err)
error (2, err, "vm_statistics");
/* Print them. */
if (terse)
{
int first = 1;
if (print_heading)
{
int which;
for (which = 0; which < num_fields; which++)
if (output_fields & (1 << which))
{
if (first)
first = 0;
else
putchar (' ');
fputs (fields[which].hdr, stdout);
}
putchar ('\n');
}
first = 1;
for (field = fields; field->name; field++)
if (output_fields & (1 << (field - fields)))
{
int width = strlen (field->hdr);
if (first)
first = 0;
else
putchar (' ');
printf ("%*d", width,
*(integer_t *)((char *)&stats + field->offs));
}
putchar ('\n');
}
else
/* Verbose output. */
{
int max_desc_width = 0;
if (print_prefix < 0)
/* By default, only print a prefix if there are multiple fields. */
print_prefix = (output_fields & (output_fields - 1));
if (print_prefix)
/* Find the widest description string, so we can align the output. */
for (field = fields; field->name; field++)
if (output_fields & (1 << (field - fields)))
{
int desc_len = strlen (field->desc);
if (desc_len > max_desc_width)
max_desc_width = desc_len;
}
for (field = fields; field->name; field++)
if (output_fields & (1 << (field - fields)))
if (print_prefix)
printf ("%s:%*d\n",
field->desc,
max_desc_width + 5 - strlen (field->desc),
*(integer_t *)((char *)&stats + field->offs));
else
printf ("%d\n", *(integer_t *)((char *)&stats + field->offs));
}
exit (0);
}
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