/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2003,2004 Joseph Koshy
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/cpuset.h>
#include <sys/sysctl.h>
#include <assert.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <pmc.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
/* Compile time defaults */
#define PMCC_PRINT_USAGE 0
#define PMCC_PRINT_EVENTS 1
#define PMCC_LIST_STATE 2
#define PMCC_ENABLE_DISABLE 3
#define PMCC_SHOW_STATISTICS 4
#define PMCC_CPU_ALL -1
#define PMCC_CPU_WILDCARD '*'
#define PMCC_PMC_ALL -1
#define PMCC_PMC_WILDCARD '*'
#define PMCC_OP_IGNORE 0
#define PMCC_OP_DISABLE 1
#define PMCC_OP_ENABLE 2
#define PMCC_PROGRAM_NAME "pmccontrol"
static STAILQ_HEAD(pmcc_op_list, pmcc_op) head = STAILQ_HEAD_INITIALIZER(head);
struct pmcc_op {
char op_cpu;
char op_pmc;
char op_op;
STAILQ_ENTRY(pmcc_op) op_next;
};
/* Function Prototypes */
#if DEBUG
static void pmcc_init_debug(void);
#endif
static int pmcc_do_list_state(void);
static int pmcc_do_enable_disable(struct pmcc_op_list *);
static int pmcc_do_list_events(void);
/* Globals */
static char usage_message[] =
"Usage:\n"
" " PMCC_PROGRAM_NAME " -L\n"
" " PMCC_PROGRAM_NAME " -l\n"
" " PMCC_PROGRAM_NAME " -s\n"
" " PMCC_PROGRAM_NAME " [-e pmc | -d pmc | -c cpu] ...";
#if DEBUG
static FILE *debug_stream = NULL;
#endif
#if DEBUG
#define DEBUG_MSG(...) \
(void) fprintf(debug_stream, "[pmccontrol] " __VA_ARGS__)
#else
#define DEBUG_MSG(m) /* */
#endif /* !DEBUG */
#if DEBUG
/* log debug messages to a separate file */
static void
pmcc_init_debug(void)
{
char *fn;
fn = getenv("PMCCONTROL_DEBUG");
if (fn != NULL)
{
debug_stream = fopen(fn, "w");
if (debug_stream == NULL)
debug_stream = stderr;
} else
debug_stream = stderr;
}
#endif
static int
pmcc_do_enable_disable(struct pmcc_op_list *op_list)
{
int c, error, i, j, ncpu, npmc, t;
struct pmcc_op *np;
unsigned char *map;
unsigned char op;
int cpu, pmc;
if ((ncpu = pmc_ncpu()) < 0)
err(EX_OSERR, "Unable to determine the number of cpus");
/* Determine the maximum number of PMCs in any CPU. */
npmc = 0;
for (c = 0; c < ncpu; c++) {
if ((t = pmc_npmc(c)) < 0)
err(EX_OSERR,
"Unable to determine the number of PMCs in CPU %d",
c);
npmc = MAX(t, npmc);
}
if (npmc == 0)
errx(EX_CONFIG, "No PMCs found");
if ((map = calloc(npmc, ncpu)) == NULL)
err(EX_SOFTWARE, "Out of memory");
error = 0;
STAILQ_FOREACH(np, op_list, op_next) {
cpu = np->op_cpu;
pmc = np->op_pmc;
op = np->op_op;
if (cpu >= ncpu)
errx(EX_DATAERR, "CPU id too large: \"%d\"", cpu);
if (pmc >= npmc)
errx(EX_DATAERR, "PMC id too large: \"%d\"", pmc);
#define MARKMAP(M,C,P,V) do { \
*((M) + (C)*npmc + (P)) = (V); \
} while (0)
#define SET_PMCS(C,P,V) do { \
if ((P) == PMCC_PMC_ALL) { \
for (j = 0; j < npmc; j++) \
MARKMAP(map, (C), j, (V)); \
} else \
MARKMAP(map, (C), (P), (V)); \
} while (0)
#define MAP(M,C,P) (*((M) + (C)*npmc + (P)))
if (cpu == PMCC_CPU_ALL)
for (i = 0; i < ncpu; i++) {
SET_PMCS(i, pmc, op);
}
else
SET_PMCS(cpu, pmc, op);
}
/* Configure PMCS */
for (i = 0; i < ncpu; i++)
for (j = 0; j < npmc; j++) {
unsigned char b;
b = MAP(map, i, j);
error = 0;
if (b == PMCC_OP_ENABLE)
error = pmc_enable(i, j);
else if (b == PMCC_OP_DISABLE)
error = pmc_disable(i, j);
if (error < 0)
err(EX_OSERR, "%s of PMC %d on CPU %d failed",
b == PMCC_OP_ENABLE ? "Enable" : "Disable",
j, i);
}
return error;
}
static int
pmcc_do_list_state(void)
{
cpuset_t logical_cpus_mask;
long cpusetsize;
size_t setsize;
int c, cpu, n, npmc, ncpu;
struct pmc_info *pd;
struct pmc_pmcinfo *pi;
const struct pmc_cpuinfo *pc;
if (pmc_cpuinfo(&pc) != 0)
err(EX_OSERR, "Unable to determine CPU information");
printf("%d %s CPUs present, with %d PMCs per CPU\n", pc->pm_ncpu,
pmc_name_of_cputype(pc->pm_cputype),
pc->pm_npmc);
/* Determine the set of logical CPUs. */
cpusetsize = sysconf(_SC_CPUSET_SIZE);
if (cpusetsize == -1 || (u_long)cpusetsize > sizeof(cpuset_t))
err(EX_OSERR, "Cannot determine which CPUs are logical");
CPU_ZERO(&logical_cpus_mask);
setsize = (size_t)cpusetsize;
if (sysctlbyname("machdep.logical_cpus_mask", &logical_cpus_mask,
&setsize, NULL, 0) < 0)
CPU_ZERO(&logical_cpus_mask);
ncpu = pc->pm_ncpu;
for (c = cpu = 0; cpu < ncpu; cpu++) {
if (pmc_pmcinfo(cpu, &pi) < 0) {
if (errno == ENXIO)
continue;
err(EX_OSERR, "Unable to get PMC status for CPU %d",
cpu);
}
printf("#CPU %d:\n", c++);
npmc = pmc_npmc(cpu);
printf("#N NAME CLASS STATE ROW-DISP\n");
for (n = 0; n < npmc; n++) {
pd = &pi->pm_pmcs[n];
printf(" %-2d %-16s %-6s %-8s %-10s",
n,
pd->pm_name,
pmc_name_of_class(pd->pm_class),
pd->pm_enabled ? "ENABLED" : "DISABLED",
pmc_name_of_disposition(pd->pm_rowdisp));
if (pd->pm_ownerpid != -1) {
printf(" (pid %d)", pd->pm_ownerpid);
printf(" %-32s",
pmc_name_of_event(pd->pm_event));
if (PMC_IS_SAMPLING_MODE(pd->pm_mode))
printf(" (reload count %jd)",
pd->pm_reloadcount);
}
printf("\n");
}
free(pi);
}
return 0;
}
static int
pmcc_do_list_events(void)
{
enum pmc_class c;
unsigned int i, j, nevents;
const char **eventnamelist;
const struct pmc_cpuinfo *ci;
/* First, try pmu events. */
if (pmc_pmu_enabled()) {
pmc_pmu_print_counters(NULL);
return (0);
}
/* Otherwise, use the legacy pmc(3) interfaces. */
if (pmc_cpuinfo(&ci) != 0)
err(EX_OSERR, "Unable to determine CPU information");
eventnamelist = NULL;
for (i = 0; i < ci->pm_nclass; i++) {
c = ci->pm_classes[i].pm_class;
printf("%s\n", pmc_name_of_class(c));
if (pmc_event_names_of_class(c, &eventnamelist, &nevents) < 0)
err(EX_OSERR,
"ERROR: Cannot find information for event class \"%s\"",
pmc_name_of_class(c));
for (j = 0; j < nevents; j++)
printf("\t%s\n", eventnamelist[j]);
free(eventnamelist);
}
return 0;
}
static int
pmcc_show_statistics(void)
{
struct pmc_driverstats gms;
if (pmc_get_driver_stats(&gms) < 0)
err(EX_OSERR, "ERROR: cannot retrieve driver statistics");
/*
* Print statistics.
*/
#define PRINT(N,V) (void) printf("%-40s %d\n", (N), gms.pm_##V)
PRINT("interrupts processed:", intr_processed);
PRINT("non-PMC interrupts:", intr_ignored);
PRINT("sampling stalls due to space shortages:", intr_bufferfull);
PRINT("system calls:", syscalls);
PRINT("system calls with errors:", syscall_errors);
PRINT("buffer requests:", buffer_requests);
PRINT("buffer requests failed:", buffer_requests_failed);
PRINT("sampling log sweeps:", log_sweeps);
return 0;
}
/*
* Main
*/
int
main(int argc, char **argv)
{
int error, command, currentcpu, option, pmc;
char *dummy;
struct pmcc_op *p;
#if DEBUG
pmcc_init_debug();
#endif
/* parse args */
currentcpu = PMCC_CPU_ALL;
command = PMCC_PRINT_USAGE;
error = 0;
STAILQ_INIT(&head);
while ((option = getopt(argc, argv, ":c:d:e:lLs")) != -1)
switch (option) {
case 'L':
if (command != PMCC_PRINT_USAGE) {
error = 1;
break;
}
command = PMCC_PRINT_EVENTS;
break;
case 'c':
if (command != PMCC_PRINT_USAGE &&
command != PMCC_ENABLE_DISABLE) {
error = 1;
break;
}
command = PMCC_ENABLE_DISABLE;
if (*optarg == PMCC_CPU_WILDCARD)
currentcpu = PMCC_CPU_ALL;
else {
currentcpu = strtoul(optarg, &dummy, 0);
if (*dummy != '\0' || currentcpu < 0)
errx(EX_DATAERR,
"\"%s\" is not a valid CPU id",
optarg);
}
break;
case 'd':
case 'e':
if (command != PMCC_PRINT_USAGE &&
command != PMCC_ENABLE_DISABLE) {
error = 1;
break;
}
command = PMCC_ENABLE_DISABLE;
if (*optarg == PMCC_PMC_WILDCARD)
pmc = PMCC_PMC_ALL;
else {
pmc = strtoul(optarg, &dummy, 0);
if (*dummy != '\0' || pmc < 0)
errx(EX_DATAERR,
"\"%s\" is not a valid PMC id",
optarg);
}
if ((p = malloc(sizeof(*p))) == NULL)
err(EX_SOFTWARE, "Out of memory");
p->op_cpu = currentcpu;
p->op_pmc = pmc;
p->op_op = option == 'd' ? PMCC_OP_DISABLE :
PMCC_OP_ENABLE;
STAILQ_INSERT_TAIL(&head, p, op_next);
break;
case 'l':
if (command != PMCC_PRINT_USAGE) {
error = 1;
break;
}
command = PMCC_LIST_STATE;
break;
case 's':
if (command != PMCC_PRINT_USAGE) {
error = 1;
break;
}
command = PMCC_SHOW_STATISTICS;
break;
case ':':
errx(EX_USAGE,
"Missing argument to option '-%c'", optopt);
break;
case '?':
warnx("Unrecognized option \"-%c\"", optopt);
errx(EX_USAGE, "%s", usage_message);
break;
default:
error = 1;
break;
}
if (command == PMCC_PRINT_USAGE)
(void) errx(EX_USAGE, "%s", usage_message);
if (error)
exit(EX_USAGE);
if (pmc_init() < 0)
err(EX_UNAVAILABLE,
"Initialization of the pmc(3) library failed");
switch (command) {
case PMCC_LIST_STATE:
error = pmcc_do_list_state();
break;
case PMCC_PRINT_EVENTS:
error = pmcc_do_list_events();
break;
case PMCC_SHOW_STATISTICS:
error = pmcc_show_statistics();
break;
case PMCC_ENABLE_DISABLE:
if (STAILQ_EMPTY(&head))
errx(EX_USAGE,
"No PMCs specified to enable or disable");
error = pmcc_do_enable_disable(&head);
break;
default:
assert(0);
}
if (error != 0)
err(EX_OSERR, "Command failed");
exit(0);
}
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