mirror of
https://git.FreeBSD.org/src.git
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ebccf1e3a6
and documentation into -CURRENT. Bump FreeBSD_version. Reviewed by: alc, jhb (kernel changes)
729 lines
19 KiB
C
729 lines
19 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/types.h>
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#include <sys/event.h>
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#include <sys/queue.h>
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#include <sys/time.h>
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#include <sys/ttycom.h>
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#include <sys/wait.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 <math.h>
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#include <pmc.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdint.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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/* Operation modes */
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#define FLAG_HAS_PID 0x00000001
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#define FLAG_HAS_WAIT_INTERVAL 0x00000002
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#define FLAG_HAS_LOG_FILE 0x00000004
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#define FLAG_HAS_PROCESS 0x00000008
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#define FLAG_USING_SAMPLING 0x00000010
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#define FLAG_USING_COUNTING 0x00000020
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#define FLAG_USING_PROCESS_PMC 0x00000040
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#define DEFAULT_SAMPLE_COUNT 65536
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#define DEFAULT_WAIT_INTERVAL 5.0
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#define DEFAULT_DISPLAY_HEIGHT 23
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#define DEFAULT_LOGFILE_NAME "pmcstat.out"
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#define PRINT_HEADER_PREFIX "# "
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#define READPIPEFD 0
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#define WRITEPIPEFD 1
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#define NPIPEFD 2
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struct pmcstat_ev {
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STAILQ_ENTRY(pmcstat_ev) ev_next;
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char *ev_spec; /* event specification */
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char *ev_name; /* (derived) event name */
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enum pmc_mode ev_mode; /* desired mode */
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int ev_count; /* associated count if in sampling mode */
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int ev_cpu; /* specific cpu if requested */
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int ev_descendants; /* attach to descendants */
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int ev_cumulative; /* show cumulative counts */
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int ev_fieldwidth; /* print width */
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int ev_fieldskip; /* #leading spaces */
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pmc_value_t ev_saved; /* saved value for incremental counts */
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pmc_id_t ev_pmcid; /* allocated ID */
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};
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struct pmcstat_args {
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int pa_flags;
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pid_t pa_pid;
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FILE *pa_outputfile;
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FILE *pa_logfile;
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double pa_interval;
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int pa_argc;
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char **pa_argv;
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STAILQ_HEAD(, pmcstat_ev) pa_head;
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} args;
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int pmcstat_interrupt = 0;
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int pmcstat_displayheight = DEFAULT_DISPLAY_HEIGHT;
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int pmcstat_pipefd[NPIPEFD];
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int pmcstat_kq;
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/* Function prototypes */
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void pmcstat_cleanup(struct pmcstat_args *_a);
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void pmcstat_print_counters(struct pmcstat_args *_a);
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void pmcstat_print_headers(struct pmcstat_args *_a);
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void pmcstat_print_pmcs(struct pmcstat_args *_a);
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void pmcstat_setup_process(struct pmcstat_args *_a);
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void pmcstat_show_usage(void);
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void pmcstat_start_pmcs(struct pmcstat_args *_a);
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void pmcstat_start_process(struct pmcstat_args *_a);
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/*
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* cleanup
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*/
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void
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pmcstat_cleanup(struct pmcstat_args *a)
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{
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struct pmcstat_ev *ev, *tmp;
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/* de-configure the log file if present. */
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if (a->pa_flags & FLAG_USING_SAMPLING) {
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(void) pmc_configure_logfile(-1);
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(void) fclose(a->pa_logfile);
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}
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/* release allocated PMCs. */
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STAILQ_FOREACH_SAFE(ev, &a->pa_head, ev_next, tmp)
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if (ev->ev_pmcid != PMC_ID_INVALID) {
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if (pmc_release(ev->ev_pmcid) < 0)
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err(EX_OSERR, "ERROR: cannot release pmc "
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"%d \"%s\"", ev->ev_pmcid, ev->ev_name);
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free(ev->ev_name);
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free(ev->ev_spec);
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STAILQ_REMOVE(&a->pa_head, ev, pmcstat_ev, ev_next);
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free(ev);
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}
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}
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void
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pmcstat_start_pmcs(struct pmcstat_args *a)
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{
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struct pmcstat_ev *ev;
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STAILQ_FOREACH(ev, &args.pa_head, ev_next) {
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assert(ev->ev_pmcid != PMC_ID_INVALID);
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if (pmc_start(ev->ev_pmcid) < 0) {
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warn("ERROR: Cannot start pmc %d \"%s\"",
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ev->ev_pmcid, ev->ev_name);
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pmcstat_cleanup(a);
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}
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}
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}
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void
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pmcstat_print_headers(struct pmcstat_args *a)
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{
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struct pmcstat_ev *ev;
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int c;
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(void) fprintf(a->pa_outputfile, PRINT_HEADER_PREFIX);
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STAILQ_FOREACH(ev, &a->pa_head, ev_next) {
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if (PMC_IS_SAMPLING_MODE(ev->ev_mode))
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continue;
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c = PMC_IS_SYSTEM_MODE(ev->ev_mode) ? 's' : 'p';
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if (ev->ev_fieldskip != 0) {
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(void) fprintf(a->pa_outputfile, "%*s%c/%*s ",
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ev->ev_fieldskip, "", c,
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ev->ev_fieldwidth - ev->ev_fieldskip - 2,
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ev->ev_name);
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} else
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(void) fprintf(a->pa_outputfile, "%c/%*s ",
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c, ev->ev_fieldwidth - 2, ev->ev_name);
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}
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(void) fflush(a->pa_outputfile);
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}
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void
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pmcstat_print_counters(struct pmcstat_args *a)
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{
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int extra_width;
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struct pmcstat_ev *ev;
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pmc_value_t value;
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extra_width = sizeof(PRINT_HEADER_PREFIX) - 1;
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STAILQ_FOREACH(ev, &a->pa_head, ev_next) {
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/* skip sampling mode counters */
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if (PMC_IS_SAMPLING_MODE(ev->ev_mode))
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continue;
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if (pmc_read(ev->ev_pmcid, &value) < 0)
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err(EX_OSERR, "ERROR: Cannot read pmc "
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"\"%s\"", ev->ev_name);
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(void) fprintf(a->pa_outputfile, "%*ju ",
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ev->ev_fieldwidth + extra_width, (uintmax_t)
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ev->ev_cumulative ? value : (value - ev->ev_saved));
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if (ev->ev_cumulative == 0)
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ev->ev_saved = value;
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extra_width = 0;
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}
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(void) fflush(a->pa_outputfile);
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}
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/*
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* Print output
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*/
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void
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pmcstat_print_pmcs(struct pmcstat_args *a)
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{
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static int linecount = 0;
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if (++linecount > pmcstat_displayheight) {
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(void) fprintf(a->pa_outputfile, "\n");
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linecount = 1;
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}
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if (linecount == 1)
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pmcstat_print_headers(a);
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(void) fprintf(a->pa_outputfile, "\n");
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pmcstat_print_counters(a);
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return;
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}
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/*
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* Do process profiling
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*
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* If a pid was specified, attach each allocated PMC to the target
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* process. Otherwise, fork a child and attach the PMCs to the child,
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* and have the child exec() the target program.
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*/
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void
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pmcstat_setup_process(struct pmcstat_args *a)
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{
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char token;
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struct pmcstat_ev *ev;
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struct kevent kev;
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if (a->pa_flags & FLAG_HAS_PID) {
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STAILQ_FOREACH(ev, &args.pa_head, ev_next)
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if (pmc_attach(ev->ev_pmcid, a->pa_pid) != 0)
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err(EX_OSERR, "ERROR: cannot attach pmc \"%s\" to "
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"process %d", ev->ev_name, (int) a->pa_pid);
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} else {
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/*
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* We need to fork a new process and startup the child
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* using execvp(). Before doing the exec() the child
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* process reads its pipe for a token so that the parent
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* can finish doing its pmc_attach() calls.
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*/
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if (pipe(pmcstat_pipefd) < 0)
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err(EX_OSERR, "ERROR: cannot create pipe");
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switch (a->pa_pid = fork()) {
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case -1:
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err(EX_OSERR, "ERROR: cannot fork");
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/*NOTREACHED*/
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case 0: /* child */
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/* wait for our parent to signal us */
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(void) close(pmcstat_pipefd[WRITEPIPEFD]);
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if (read(pmcstat_pipefd[READPIPEFD], &token, 1) < 0)
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err(EX_OSERR, "ERROR (child): cannot read "
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"token");
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(void) close(pmcstat_pipefd[READPIPEFD]);
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/* exec() the program requested */
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execvp(*args.pa_argv, args.pa_argv);
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err(EX_OSERR, "ERROR (child): execvp failed");
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/*NOTREACHED*/
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default: /* parent */
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(void) close(pmcstat_pipefd[READPIPEFD]);
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/* attach all our PMCs to the child */
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STAILQ_FOREACH(ev, &args.pa_head, ev_next)
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if (PMC_IS_VIRTUAL_MODE(ev->ev_mode) &&
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pmc_attach(ev->ev_pmcid, a->pa_pid) != 0)
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err(EX_OSERR, "ERROR: cannot attach pmc "
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"\"%s\" to process %d", ev->ev_name,
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(int) a->pa_pid);
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}
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}
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/* Ask to be notified via a kevent when the child exits */
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EV_SET(&kev, a->pa_pid, EVFILT_PROC, EV_ADD, NOTE_EXIT, 0, 0);
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if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
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err(EX_OSERR, "ERROR: cannot monitor process %d",
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a->pa_pid);
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return;
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}
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void
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pmcstat_start_process(struct pmcstat_args *a)
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{
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/* nothing to do: target is already running */
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if (a->pa_flags & FLAG_HAS_PID)
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return;
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/* write token to child to state that we are ready */
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if (write(pmcstat_pipefd[WRITEPIPEFD], "+", 1) != 1)
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err(EX_OSERR, "ERROR: write failed");
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(void) close(pmcstat_pipefd[WRITEPIPEFD]);
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}
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void
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pmcstat_show_usage(void)
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{
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errx(EX_USAGE,
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"[options] [commandline]\n"
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"\t Measure process and/or system performance using hardware\n"
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"\t performance monitoring counters.\n"
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"\t Options include:\n"
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"\t -C\t\t toggle showing cumulative counts\n"
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"\t -O file\t set sampling log file to \"file\"\n"
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"\t -P spec\t allocate process-private sampling PMC\n"
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"\t -S spec\t allocate system-wide sampling PMC\n"
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"\t -c cpu\t\t set default cpu\n"
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"\t -d\t\t toggle tracking descendants\n"
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"\t -n rate\t set sampling rate\n"
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"\t -o file\t send print output to \"file\"\n"
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"\t -p spec\t allocate process-private counting PMC\n"
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"\t -s spec\t allocate system-wide counting PMC\n"
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"\t -t pid\t attach to running process with pid \"pid\"\n"
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"\t -w secs\t set printing time interval"
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);
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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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double interval;
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int option, npmc, ncpu;
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int c, current_cpu, current_sampling_count;
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int running;
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int do_descendants, use_cumulative_counts;
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pid_t pid;
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char *end;
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struct pmcstat_ev *ev;
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struct pmc_op_getpmcinfo *ppmci;
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struct sigaction sa;
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struct kevent kev;
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struct winsize ws;
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current_cpu = 0;
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current_sampling_count = DEFAULT_SAMPLE_COUNT;
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do_descendants = 0;
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use_cumulative_counts = 0;
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args.pa_flags = 0;
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args.pa_pid = (pid_t) -1;
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args.pa_logfile = NULL;
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args.pa_outputfile = stderr;
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args.pa_interval = DEFAULT_WAIT_INTERVAL;
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STAILQ_INIT(&args.pa_head);
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ev = NULL;
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while ((option = getopt(argc, argv, "CO:P:S:c:dn:o:p:s:t:w:")) != -1)
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switch (option) {
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case 'C': /* cumulative values */
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use_cumulative_counts = !use_cumulative_counts;
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break;
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case 'c': /* CPU */
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current_cpu = strtol(optarg, &end, 0);
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if (*end != '\0' || current_cpu < 0)
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errx(EX_USAGE,
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"ERROR: Illegal CPU number \"%s\"",
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optarg);
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break;
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case 'd': /* toggle descendents */
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do_descendants = !do_descendants;
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break;
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case 'p': /* process virtual counting PMC */
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case 's': /* system-wide counting PMC */
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case 'P': /* process virtual sampling PMC */
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case 'S': /* system-wide sampling PMC */
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if ((ev = malloc(sizeof(*ev))) == NULL)
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errx(EX_SOFTWARE, "ERROR: Out of memory");
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switch (option) {
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case 'p': ev->ev_mode = PMC_MODE_TC; break;
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case 's': ev->ev_mode = PMC_MODE_SC; break;
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case 'P': ev->ev_mode = PMC_MODE_TS; break;
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case 'S': ev->ev_mode = PMC_MODE_SS; break;
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}
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if (option == 'P' || option == 'p')
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args.pa_flags |= FLAG_USING_PROCESS_PMC;
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if (option == 'P' || option == 'S')
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args.pa_flags |= FLAG_USING_SAMPLING;
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if (option == 'p' || option == 's')
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args.pa_flags |= FLAG_USING_COUNTING;
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ev->ev_spec = strdup(optarg);
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if (option == 'S' || option == 'P')
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ev->ev_count = current_sampling_count;
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else
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ev->ev_count = -1;
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if (option == 'S' || option == 's')
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ev->ev_cpu = current_cpu;
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else
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ev->ev_cpu = PMC_CPU_ANY;
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ev->ev_descendants = do_descendants;
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ev->ev_cumulative = use_cumulative_counts;
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ev->ev_saved = 0LL;
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ev->ev_pmcid = PMC_ID_INVALID;
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/* extract event name */
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c = strcspn(optarg, ", \t");
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ev->ev_name = malloc(c + 1);
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(void) strncpy(ev->ev_name, optarg, c);
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*(ev->ev_name + c) = '\0';
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STAILQ_INSERT_TAIL(&args.pa_head, ev, ev_next);
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break;
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case 'n': /* sampling count */
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current_sampling_count = strtol(optarg, &end, 0);
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if (*end != '\0' || current_sampling_count <= 0)
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errx(EX_USAGE,
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"ERROR: Illegal count value \"%s\"",
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optarg);
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break;
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case 'o': /* outputfile */
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if (args.pa_outputfile != NULL)
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(void) fclose(args.pa_outputfile);
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if ((args.pa_outputfile = fopen(optarg, "w")) == NULL)
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errx(EX_OSERR, "ERROR: cannot open \"%s\" for "
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"writing", optarg);
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case 'O': /* sampling output */
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if (args.pa_logfile != NULL)
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(void) fclose(args.pa_logfile);
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if ((args.pa_logfile = fopen(optarg, "w")) == NULL)
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errx(EX_OSERR, "ERROR: cannot open \"%s\" for "
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"writing", optarg);
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break;
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case 't': /* target pid */
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pid = strtol(optarg, &end, 0);
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if (*end != '\0' || pid <= 0)
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errx(EX_USAGE, "ERROR: Illegal pid value "
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"\"%s\"", optarg);
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args.pa_flags |= FLAG_HAS_PID;
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args.pa_pid = pid;
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break;
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case 'w': /* wait interval */
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interval = strtod(optarg, &end);
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if (*end != '\0' || interval <= 0)
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errx(EX_USAGE, "ERROR: Illegal wait interval "
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"value \"%s\"", optarg);
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args.pa_flags |= FLAG_HAS_WAIT_INTERVAL;
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args.pa_interval = interval;
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|
|
break;
|
|
|
|
case '?':
|
|
default:
|
|
pmcstat_show_usage();
|
|
break;
|
|
|
|
}
|
|
|
|
args.pa_argc = (argc -= optind);
|
|
args.pa_argv = (argv += optind);
|
|
|
|
if (argc)
|
|
args.pa_flags |= FLAG_HAS_PROCESS;
|
|
|
|
/*
|
|
* Check invocation syntax.
|
|
*/
|
|
|
|
if (STAILQ_EMPTY(&args.pa_head)) {
|
|
warnx("ERROR: At least one PMC event must be specified");
|
|
pmcstat_show_usage();
|
|
}
|
|
|
|
if (argc == 0) {
|
|
if (args.pa_pid == -1) {
|
|
if (args.pa_flags & FLAG_USING_PROCESS_PMC)
|
|
errx(EX_USAGE, "ERROR: the -P or -p options "
|
|
"require a target process");
|
|
} else if ((args.pa_flags & FLAG_USING_PROCESS_PMC) == 0)
|
|
errx(EX_USAGE,
|
|
"ERROR: option -t requires a process-mode pmc "
|
|
"specification");
|
|
} else if (args.pa_pid != -1)
|
|
errx(EX_USAGE,
|
|
"ERROR: option -t cannot be specified with a command "
|
|
"name");
|
|
|
|
if (pmc_init() < 0)
|
|
err(EX_UNAVAILABLE,
|
|
"ERROR: Initialization of the pmc(3) library failed");
|
|
|
|
if ((ncpu = pmc_ncpu()) < 0)
|
|
err(EX_OSERR, "ERROR: Cannot determine the number CPUs "
|
|
"on the system");
|
|
|
|
if ((npmc = pmc_npmc(0)) < 0) /* assume all CPUs are identical */
|
|
err(EX_OSERR, "ERROR: Cannot determine the number of PMCs "
|
|
"on CPU %d", 0);
|
|
|
|
/*
|
|
* Allocate PMCs.
|
|
*/
|
|
|
|
if (pmc_pmcinfo(0, &ppmci) < 0)
|
|
err(EX_OSERR, "ERROR: cannot retrieve pmc information");
|
|
|
|
assert(ppmci != NULL);
|
|
|
|
STAILQ_FOREACH(ev, &args.pa_head, ev_next)
|
|
if (pmc_allocate(ev->ev_spec, ev->ev_mode,
|
|
(ev->ev_descendants ? PMC_F_DESCENDANTS : 0),
|
|
ev->ev_cpu, &ev->ev_pmcid) < 0)
|
|
err(EX_OSERR, "ERROR: Cannot allocate %s-mode pmc with "
|
|
"specification \"%s\"",
|
|
PMC_IS_SYSTEM_MODE(ev->ev_mode) ? "system" : "process",
|
|
ev->ev_spec);
|
|
|
|
/* compute printout widths */
|
|
STAILQ_FOREACH(ev, &args.pa_head, ev_next) {
|
|
int pmc_width;
|
|
int pmc_display_width;
|
|
int pmc_header_width;
|
|
|
|
pmc_width = ppmci->pm_pmcs[ev->ev_pmcid].pm_width;
|
|
pmc_header_width = strlen(ev->ev_name) + 2; /* prefix '%c|' */
|
|
pmc_display_width = (int) floor(pmc_width / 3.32193) + 1;
|
|
|
|
if (pmc_header_width > pmc_display_width) {
|
|
ev->ev_fieldskip = 0;
|
|
ev->ev_fieldwidth = pmc_header_width;
|
|
} else {
|
|
ev->ev_fieldskip = pmc_display_width -
|
|
pmc_header_width;
|
|
ev->ev_fieldwidth = pmc_display_width;
|
|
}
|
|
}
|
|
|
|
/* Allocate a kqueue */
|
|
if ((pmcstat_kq = kqueue()) < 0)
|
|
err(EX_OSERR, "ERROR: Cannot allocate kqueue");
|
|
|
|
/*
|
|
* If our output is being set to a terminal, register a handler
|
|
* for window size changes.
|
|
*/
|
|
|
|
if (isatty(fileno(args.pa_outputfile))) {
|
|
|
|
if (ioctl(fileno(args.pa_outputfile), TIOCGWINSZ, &ws) < 0)
|
|
err(EX_OSERR, "ERROR: Cannot determine window size");
|
|
|
|
pmcstat_displayheight = ws.ws_row - 1;
|
|
|
|
EV_SET(&kev, SIGWINCH, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
|
|
|
|
if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
|
|
err(EX_OSERR, "ERROR: Cannot register kevent for "
|
|
"SIGWINCH");
|
|
}
|
|
|
|
EV_SET(&kev, SIGINT, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
|
|
|
|
if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
|
|
err(EX_OSERR, "ERROR: Cannot register kevent for SIGINT");
|
|
|
|
if (args.pa_flags & FLAG_USING_SAMPLING) {
|
|
|
|
/*
|
|
* configure log file
|
|
*/
|
|
|
|
if (args.pa_logfile == NULL)
|
|
if ((args.pa_logfile =
|
|
fopen(DEFAULT_LOGFILE_NAME, "w")) == NULL)
|
|
err(EX_CANTCREAT, "ERROR: Cannot open sampling "
|
|
"log file \"%s\"", DEFAULT_LOGFILE_NAME);
|
|
|
|
if (pmc_configure_logfile(fileno(args.pa_logfile)) < 0)
|
|
err(EX_OSERR, "ERROR: Cannot configure sampling "
|
|
"log");
|
|
|
|
STAILQ_FOREACH(ev, &args.pa_head, ev_next)
|
|
if (PMC_IS_SAMPLING_MODE(ev->ev_mode) &&
|
|
pmc_set(ev->ev_pmcid, ev->ev_count) < 0)
|
|
err(EX_OSERR, "ERROR: Cannot set sampling count "
|
|
"for PMC \"%s\"", ev->ev_name);
|
|
}
|
|
|
|
/* setup a timer for any counting mode PMCs */
|
|
if (args.pa_flags & FLAG_USING_COUNTING) {
|
|
EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0,
|
|
args.pa_interval * 1000, NULL);
|
|
|
|
if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
|
|
err(EX_OSERR, "ERROR: Cannot register kevent for "
|
|
"timer");
|
|
}
|
|
|
|
/* attach PMCs to the target process, starting it if specified */
|
|
if (args.pa_flags & FLAG_HAS_PROCESS)
|
|
pmcstat_setup_process(&args);
|
|
|
|
/* start the pmcs */
|
|
pmcstat_start_pmcs(&args);
|
|
|
|
/* start the (commandline) process if needed */
|
|
if (args.pa_flags & FLAG_HAS_PROCESS)
|
|
pmcstat_start_process(&args);
|
|
|
|
/* Handle SIGINT using the kqueue loop */
|
|
sa.sa_handler = SIG_IGN;
|
|
sa.sa_flags = 0;
|
|
(void) sigemptyset(&sa.sa_mask);
|
|
|
|
if (sigaction(SIGINT, &sa, NULL) < 0)
|
|
err(EX_OSERR, "ERROR: Cannot install signal handler");
|
|
|
|
/*
|
|
* loop till either the target process (if any) exits, or we
|
|
* are killed by a SIGINT.
|
|
*/
|
|
|
|
running = 1;
|
|
do {
|
|
if ((c = kevent(pmcstat_kq, NULL, 0, &kev, 1, NULL)) <= 0) {
|
|
if (errno != EINTR)
|
|
err(EX_OSERR, "ERROR: kevent failed");
|
|
else
|
|
continue;
|
|
}
|
|
|
|
if (kev.flags & EV_ERROR)
|
|
errc(EX_OSERR, kev.data, "ERROR: kevent failed");
|
|
|
|
switch (kev.filter) {
|
|
case EVFILT_PROC: /* target process exited */
|
|
running = 0;
|
|
/* FALLTHROUGH */
|
|
|
|
case EVFILT_TIMER: /* print out counting PMCs */
|
|
pmcstat_print_pmcs(&args);
|
|
|
|
if (running == 0) /* final newline */
|
|
(void) fprintf(args.pa_outputfile, "\n");
|
|
break;
|
|
|
|
case EVFILT_SIGNAL:
|
|
if (kev.ident == SIGINT) {
|
|
/* pass the signal on to the child process */
|
|
if ((args.pa_flags & FLAG_HAS_PROCESS) &&
|
|
(args.pa_flags & FLAG_HAS_PID) == 0)
|
|
if (kill(args.pa_pid, SIGINT) != 0)
|
|
err(EX_OSERR, "cannot kill "
|
|
"child");
|
|
running = 0;
|
|
} else if (kev.ident == SIGWINCH) {
|
|
if (ioctl(fileno(args.pa_outputfile),
|
|
TIOCGWINSZ, &ws) < 0)
|
|
err(EX_OSERR, "ERROR: Cannot determine "
|
|
"window size");
|
|
pmcstat_displayheight = ws.ws_row - 1;
|
|
} else
|
|
assert(0);
|
|
|
|
break;
|
|
}
|
|
|
|
} while (running);
|
|
|
|
pmcstat_cleanup(&args);
|
|
|
|
return 0;
|
|
}
|