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-rw-r--r--usr.sbin/pmccontrol/pmccontrol.c487
1 files changed, 487 insertions, 0 deletions
diff --git a/usr.sbin/pmccontrol/pmccontrol.c b/usr.sbin/pmccontrol/pmccontrol.c
new file mode 100644
index 0000000..c1e2acd
--- /dev/null
+++ b/usr.sbin/pmccontrol/pmccontrol.c
@@ -0,0 +1,487 @@
+/*-
+ * 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>
+__FBSDID("$FreeBSD$");
+
+#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 = t > npmc ? 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 defined(__i386__) || defined(__amd64__)
+ if (pc->pm_cputype == PMC_CPU_INTEL_PIV &&
+ CPU_ISSET(cpu, &logical_cpus_mask))
+ continue; /* skip P4-style 'logical' cpus */
+#endif
+ 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;
+
+ 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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