488 lines
11 KiB
C
488 lines
11 KiB
C
/*-
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* Copyright (c) 2003,2004 Joseph Koshy
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/cpuset.h>
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#include <sys/sysctl.h>
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#include <assert.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <pmc.h>
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#include <stdarg.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 <sysexits.h>
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#include <unistd.h>
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/* Compile time defaults */
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#define PMCC_PRINT_USAGE 0
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#define PMCC_PRINT_EVENTS 1
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#define PMCC_LIST_STATE 2
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#define PMCC_ENABLE_DISABLE 3
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#define PMCC_SHOW_STATISTICS 4
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#define PMCC_CPU_ALL -1
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#define PMCC_CPU_WILDCARD '*'
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#define PMCC_PMC_ALL -1
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#define PMCC_PMC_WILDCARD '*'
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#define PMCC_OP_IGNORE 0
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#define PMCC_OP_DISABLE 1
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#define PMCC_OP_ENABLE 2
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#define PMCC_PROGRAM_NAME "pmccontrol"
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static STAILQ_HEAD(pmcc_op_list, pmcc_op) head = STAILQ_HEAD_INITIALIZER(head);
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struct pmcc_op {
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char op_cpu;
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char op_pmc;
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char op_op;
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STAILQ_ENTRY(pmcc_op) op_next;
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};
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/* Function Prototypes */
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#if DEBUG
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static void pmcc_init_debug(void);
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#endif
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static int pmcc_do_list_state(void);
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static int pmcc_do_enable_disable(struct pmcc_op_list *);
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static int pmcc_do_list_events(void);
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/* Globals */
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static char usage_message[] =
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"Usage:\n"
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" " PMCC_PROGRAM_NAME " -L\n"
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" " PMCC_PROGRAM_NAME " -l\n"
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" " PMCC_PROGRAM_NAME " -s\n"
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" " PMCC_PROGRAM_NAME " [-e pmc | -d pmc | -c cpu] ...";
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#if DEBUG
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static FILE *debug_stream = NULL;
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#endif
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#if DEBUG
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#define DEBUG_MSG(...) \
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(void) fprintf(debug_stream, "[pmccontrol] " __VA_ARGS__);
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#else
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#define DEBUG_MSG(m) /* */
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#endif /* !DEBUG */
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#if DEBUG
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/* log debug messages to a separate file */
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static void
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pmcc_init_debug(void)
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{
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char *fn;
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fn = getenv("PMCCONTROL_DEBUG");
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if (fn != NULL)
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{
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debug_stream = fopen(fn, "w");
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if (debug_stream == NULL)
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debug_stream = stderr;
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} else
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debug_stream = stderr;
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}
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#endif
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static int
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pmcc_do_enable_disable(struct pmcc_op_list *op_list)
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{
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int c, error, i, j, ncpu, npmc, t;
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struct pmcc_op *np;
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unsigned char *map;
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unsigned char op;
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int cpu, pmc;
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if ((ncpu = pmc_ncpu()) < 0)
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err(EX_OSERR, "Unable to determine the number of cpus");
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/* Determine the maximum number of PMCs in any CPU. */
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npmc = 0;
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for (c = 0; c < ncpu; c++) {
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if ((t = pmc_npmc(c)) < 0)
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err(EX_OSERR,
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"Unable to determine the number of PMCs in CPU %d",
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c);
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npmc = MAX(t, npmc);
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}
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if (npmc == 0)
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errx(EX_CONFIG, "No PMCs found");
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if ((map = calloc(npmc, ncpu)) == NULL)
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err(EX_SOFTWARE, "Out of memory");
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error = 0;
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STAILQ_FOREACH(np, op_list, op_next) {
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cpu = np->op_cpu;
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pmc = np->op_pmc;
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op = np->op_op;
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if (cpu >= ncpu)
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errx(EX_DATAERR, "CPU id too large: \"%d\"", cpu);
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if (pmc >= npmc)
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errx(EX_DATAERR, "PMC id too large: \"%d\"", pmc);
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#define MARKMAP(M,C,P,V) do { \
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*((M) + (C)*npmc + (P)) = (V); \
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} while (0)
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#define SET_PMCS(C,P,V) do { \
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if ((P) == PMCC_PMC_ALL) { \
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for (j = 0; j < npmc; j++) \
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MARKMAP(map, (C), j, (V)); \
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} else \
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MARKMAP(map, (C), (P), (V)); \
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} while (0)
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#define MAP(M,C,P) (*((M) + (C)*npmc + (P)))
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if (cpu == PMCC_CPU_ALL)
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for (i = 0; i < ncpu; i++) {
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SET_PMCS(i, pmc, op);
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}
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else
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SET_PMCS(cpu, pmc, op);
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}
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/* Configure PMCS */
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for (i = 0; i < ncpu; i++)
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for (j = 0; j < npmc; j++) {
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unsigned char b;
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b = MAP(map, i, j);
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error = 0;
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if (b == PMCC_OP_ENABLE)
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error = pmc_enable(i, j);
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else if (b == PMCC_OP_DISABLE)
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error = pmc_disable(i, j);
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if (error < 0)
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err(EX_OSERR, "%s of PMC %d on CPU %d failed",
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b == PMCC_OP_ENABLE ? "Enable" : "Disable",
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j, i);
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}
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return error;
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}
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static int
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pmcc_do_list_state(void)
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{
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cpuset_t logical_cpus_mask;
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long cpusetsize;
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size_t setsize;
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int c, cpu, n, npmc, ncpu;
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struct pmc_info *pd;
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struct pmc_pmcinfo *pi;
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const struct pmc_cpuinfo *pc;
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if (pmc_cpuinfo(&pc) != 0)
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err(EX_OSERR, "Unable to determine CPU information");
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printf("%d %s CPUs present, with %d PMCs per CPU\n", pc->pm_ncpu,
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pmc_name_of_cputype(pc->pm_cputype),
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pc->pm_npmc);
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/* Determine the set of logical CPUs. */
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cpusetsize = sysconf(_SC_CPUSET_SIZE);
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if (cpusetsize == -1 || (u_long)cpusetsize > sizeof(cpuset_t))
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err(EX_OSERR, "Cannot determine which CPUs are logical");
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CPU_ZERO(&logical_cpus_mask);
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setsize = (size_t)cpusetsize;
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if (sysctlbyname("machdep.logical_cpus_mask", &logical_cpus_mask,
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&setsize, NULL, 0) < 0)
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CPU_ZERO(&logical_cpus_mask);
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ncpu = pc->pm_ncpu;
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for (c = cpu = 0; cpu < ncpu; cpu++) {
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#if defined(__i386__) || defined(__amd64__)
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if (pc->pm_cputype == PMC_CPU_INTEL_PIV &&
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CPU_ISSET(cpu, &logical_cpus_mask))
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continue; /* skip P4-style 'logical' cpus */
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#endif
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if (pmc_pmcinfo(cpu, &pi) < 0) {
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if (errno == ENXIO)
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continue;
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err(EX_OSERR, "Unable to get PMC status for CPU %d",
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cpu);
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}
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printf("#CPU %d:\n", c++);
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npmc = pmc_npmc(cpu);
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printf("#N NAME CLASS STATE ROW-DISP\n");
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for (n = 0; n < npmc; n++) {
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pd = &pi->pm_pmcs[n];
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printf(" %-2d %-16s %-6s %-8s %-10s",
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n,
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pd->pm_name,
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pmc_name_of_class(pd->pm_class),
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pd->pm_enabled ? "ENABLED" : "DISABLED",
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pmc_name_of_disposition(pd->pm_rowdisp));
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if (pd->pm_ownerpid != -1) {
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printf(" (pid %d)", pd->pm_ownerpid);
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printf(" %-32s",
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pmc_name_of_event(pd->pm_event));
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if (PMC_IS_SAMPLING_MODE(pd->pm_mode))
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printf(" (reload count %jd)",
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pd->pm_reloadcount);
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}
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printf("\n");
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}
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free(pi);
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}
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return 0;
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}
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static int
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pmcc_do_list_events(void)
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{
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enum pmc_class c;
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unsigned int i, j, nevents;
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const char **eventnamelist;
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const struct pmc_cpuinfo *ci;
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if (pmc_cpuinfo(&ci) != 0)
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err(EX_OSERR, "Unable to determine CPU information");
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eventnamelist = NULL;
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for (i = 0; i < ci->pm_nclass; i++) {
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c = ci->pm_classes[i].pm_class;
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printf("%s\n", pmc_name_of_class(c));
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if (pmc_event_names_of_class(c, &eventnamelist, &nevents) < 0)
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err(EX_OSERR,
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"ERROR: Cannot find information for event class \"%s\"",
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pmc_name_of_class(c));
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for (j = 0; j < nevents; j++)
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printf("\t%s\n", eventnamelist[j]);
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free(eventnamelist);
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}
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return 0;
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}
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static int
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pmcc_show_statistics(void)
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{
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struct pmc_driverstats gms;
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if (pmc_get_driver_stats(&gms) < 0)
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err(EX_OSERR, "ERROR: cannot retrieve driver statistics");
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/*
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* Print statistics.
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*/
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#define PRINT(N,V) (void) printf("%-40s %d\n", (N), gms.pm_##V)
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PRINT("interrupts processed:", intr_processed);
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PRINT("non-PMC interrupts:", intr_ignored);
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PRINT("sampling stalls due to space shortages:", intr_bufferfull);
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PRINT("system calls:", syscalls);
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PRINT("system calls with errors:", syscall_errors);
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PRINT("buffer requests:", buffer_requests);
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PRINT("buffer requests failed:", buffer_requests_failed);
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PRINT("sampling log sweeps:", log_sweeps);
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return 0;
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}
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/*
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* Main
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*/
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int
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main(int argc, char **argv)
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{
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int error, command, currentcpu, option, pmc;
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char *dummy;
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struct pmcc_op *p;
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#if DEBUG
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pmcc_init_debug();
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#endif
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/* parse args */
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currentcpu = PMCC_CPU_ALL;
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command = PMCC_PRINT_USAGE;
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error = 0;
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STAILQ_INIT(&head);
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while ((option = getopt(argc, argv, ":c:d:e:lLs")) != -1)
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switch (option) {
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case 'L':
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if (command != PMCC_PRINT_USAGE) {
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error = 1;
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break;
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}
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command = PMCC_PRINT_EVENTS;
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break;
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case 'c':
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if (command != PMCC_PRINT_USAGE &&
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command != PMCC_ENABLE_DISABLE) {
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error = 1;
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break;
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}
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command = PMCC_ENABLE_DISABLE;
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if (*optarg == PMCC_CPU_WILDCARD)
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currentcpu = PMCC_CPU_ALL;
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else {
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currentcpu = strtoul(optarg, &dummy, 0);
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if (*dummy != '\0' || currentcpu < 0)
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errx(EX_DATAERR,
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"\"%s\" is not a valid CPU id",
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optarg);
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}
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break;
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case 'd':
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case 'e':
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if (command != PMCC_PRINT_USAGE &&
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command != PMCC_ENABLE_DISABLE) {
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error = 1;
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break;
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}
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command = PMCC_ENABLE_DISABLE;
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if (*optarg == PMCC_PMC_WILDCARD)
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pmc = PMCC_PMC_ALL;
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else {
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pmc = strtoul(optarg, &dummy, 0);
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if (*dummy != '\0' || pmc < 0)
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errx(EX_DATAERR,
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"\"%s\" is not a valid PMC id",
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optarg);
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}
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if ((p = malloc(sizeof(*p))) == NULL)
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err(EX_SOFTWARE, "Out of memory");
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p->op_cpu = currentcpu;
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p->op_pmc = pmc;
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p->op_op = option == 'd' ? PMCC_OP_DISABLE :
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PMCC_OP_ENABLE;
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STAILQ_INSERT_TAIL(&head, p, op_next);
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break;
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case 'l':
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if (command != PMCC_PRINT_USAGE) {
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error = 1;
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break;
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}
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command = PMCC_LIST_STATE;
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break;
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case 's':
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if (command != PMCC_PRINT_USAGE) {
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error = 1;
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break;
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}
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command = PMCC_SHOW_STATISTICS;
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break;
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case ':':
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errx(EX_USAGE,
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"Missing argument to option '-%c'", optopt);
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break;
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case '?':
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warnx("Unrecognized option \"-%c\"", optopt);
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errx(EX_USAGE, "%s", usage_message);
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break;
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default:
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error = 1;
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break;
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}
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if (command == PMCC_PRINT_USAGE)
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(void) errx(EX_USAGE, "%s", usage_message);
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if (error)
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exit(EX_USAGE);
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if (pmc_init() < 0)
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err(EX_UNAVAILABLE,
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"Initialization of the pmc(3) library failed");
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switch (command) {
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case PMCC_LIST_STATE:
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error = pmcc_do_list_state();
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break;
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case PMCC_PRINT_EVENTS:
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error = pmcc_do_list_events();
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break;
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case PMCC_SHOW_STATISTICS:
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error = pmcc_show_statistics();
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break;
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case PMCC_ENABLE_DISABLE:
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if (STAILQ_EMPTY(&head))
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errx(EX_USAGE,
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"No PMCs specified to enable or disable");
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error = pmcc_do_enable_disable(&head);
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break;
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default:
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assert(0);
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}
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if (error != 0)
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err(EX_OSERR, "Command failed");
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exit(0);
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}
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