- Implement sampling modes and logging support in hwpmc(4). - Separate MI and MD parts of hwpmc(4) and allow sharing of PMC implementations across different architectures. Add support for P4 (EMT64) style PMCs to the amd64 code. - New pmcstat(8) options: -E (exit time counts) -W (counts every context switch), -R (print log file). - pmc(3) API changes, improve our ability to keep ABI compatibility in the future. Add more 'alias' names for commonly used events. - bug fixes & documentation.
1091 lines
30 KiB
C
1091 lines
30 KiB
C
/*-
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* Copyright (c) 2003-2005, 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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#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 <pmclog.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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/*
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* A given invocation of pmcstat(8) can manage multiple PMCs of both
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* the system-wide and per-process variety. Each of these could be in
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* 'counting mode' or in 'sampling mode'.
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*
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* For 'counting mode' PMCs, pmcstat(8) will periodically issue a
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* pmc_read() at the configured time interval and print out the value
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* of the requested PMCs.
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*
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* For 'sampling mode' PMCs it can log to a file for offline analysis,
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* or can analyse sampling data "on the fly", either by converting
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* samples to printed textual form or by creating gprof(1) compatible
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* profiles, one per program executed. When creating gprof(1)
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* profiles it can optionally merge entries from multiple processes
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* for a given executable into a single profile file.
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*/
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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_HAS_SAMPLING_PMCS 0x00000010
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#define FLAG_HAS_COUNTING_PMCS 0x00000020
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#define FLAG_HAS_PROCESS_PMCS 0x00000040
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#define FLAG_HAS_SYSTEM_PMCS 0x00000080
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#define FLAG_HAS_PIPE 0x00000100
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#define FLAG_PROCESS_LOGFILE 0x00000200
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#define FLAG_DO_GPROF 0x00000400
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#define FLAG_DO_GPROF_MERGED 0x00000800
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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_BUFFER_SIZE 4096
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#define WRITELOG_MAGIC 0xA55AA55A
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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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enum pmcstat_state {
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PMCSTAT_FINISHED = 0,
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PMCSTAT_EXITING = 1,
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PMCSTAT_RUNNING = 2
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};
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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_flags; /* PMC_F_* */
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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_required;
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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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void *pa_logparser;
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char *pa_outputdir;
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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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int pmcstat_close_log(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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void pmcstat_process_log(struct pmcstat_args *_a);
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int pmcstat_print_log(struct pmcstat_args *_a);
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#define PMCSTAT_PRINT_LOG(A,T,...) do { \
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fprintf((A)->pa_outputfile, T "\t" __VA_ARGS__); \
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fprintf((A)->pa_outputfile, "\n"); \
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} while (0)
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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_HAS_LOG_FILE)
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(void) pmc_configure_logfile(-1);
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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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"0x%x \"%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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if (a->pa_logparser) {
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pmclog_close(a->pa_logparser);
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a->pa_logparser = NULL;
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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 0x%x \"%s\"",
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ev->ev_pmcid, ev->ev_name);
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pmcstat_cleanup(a);
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exit(EX_OSERR);
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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, &a->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(*a->pa_argv, a->pa_argv);
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/* and if that fails, notify the parent */
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kill(getppid(), SIGCHLD);
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err(EX_OSERR, "ERROR: execvp \"%s\" failed",
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*a->pa_argv);
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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 target process exits */
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EV_SET(&kev, a->pa_pid, EVFILT_PROC, EV_ADD|EV_ONESHOT, NOTE_EXIT, 0,
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NULL);
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if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
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err(EX_OSERR, "ERROR: cannot monitor child 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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/*
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* Process a log file in offline analysis mode.
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*/
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void
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pmcstat_process_log(struct pmcstat_args *a)
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{
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int runstate;
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/*
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* If gprof style profiles haven't been asked for, just print the
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* log to the current output file.
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*/
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if ((a->pa_flags & (FLAG_DO_GPROF_MERGED|FLAG_DO_GPROF)) == 0) {
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while ((runstate = pmcstat_print_log(a)) == PMCSTAT_RUNNING)
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;
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return;
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}
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/* convert the log to gprof compatible profiles */
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assert(0); /* To be implemented */
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}
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/*
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* Print log entries available in a configured parser.
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*/
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int
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pmcstat_print_log(struct pmcstat_args *a)
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{
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struct pmclog_ev ev;
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while (pmclog_read(a->pa_logparser, &ev) == 0) {
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assert(ev.pl_state == PMCLOG_OK);
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switch (ev.pl_type) {
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case PMCLOG_TYPE_CLOSELOG:
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PMCSTAT_PRINT_LOG(a,"close",);
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break;
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case PMCLOG_TYPE_DROPNOTIFY:
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PMCSTAT_PRINT_LOG(a,"drop",);
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break;
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case PMCLOG_TYPE_INITIALIZE:
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PMCSTAT_PRINT_LOG(a,"init","0x%x \"%s\"",
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ev.pl_u.pl_i.pl_version,
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pmc_name_of_cputype(ev.pl_u.pl_i.pl_arch));
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break;
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case PMCLOG_TYPE_MAPPINGCHANGE:
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PMCSTAT_PRINT_LOG(a,"mapping","%s %d %p %p \"%s\"",
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ev.pl_u.pl_m.pl_type == PMCLOG_MAPPING_INSERT ?
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"insert" : "delete",
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ev.pl_u.pl_m.pl_pid,
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(void *) ev.pl_u.pl_m.pl_start,
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(void *) ev.pl_u.pl_m.pl_end,
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ev.pl_u.pl_m.pl_pathname);
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break;
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case PMCLOG_TYPE_PCSAMPLE:
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PMCSTAT_PRINT_LOG(a,"sample","0x%x %d %p",
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ev.pl_u.pl_s.pl_pmcid,
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ev.pl_u.pl_s.pl_pid,
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(void *) ev.pl_u.pl_s.pl_pc);
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break;
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case PMCLOG_TYPE_PMCALLOCATE:
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PMCSTAT_PRINT_LOG(a,"allocate","0x%x \"%s\" 0x%x",
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ev.pl_u.pl_a.pl_pmcid,
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ev.pl_u.pl_a.pl_evname,
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|
ev.pl_u.pl_a.pl_flags);
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break;
|
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case PMCLOG_TYPE_PMCATTACH:
|
|
PMCSTAT_PRINT_LOG(a,"attach","0x%x %d \"%s\"",
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ev.pl_u.pl_t.pl_pmcid,
|
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ev.pl_u.pl_t.pl_pid,
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|
ev.pl_u.pl_t.pl_pathname);
|
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break;
|
|
case PMCLOG_TYPE_PMCDETACH:
|
|
PMCSTAT_PRINT_LOG(a,"detach","0x%x %d",
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ev.pl_u.pl_d.pl_pmcid,
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|
ev.pl_u.pl_d.pl_pid);
|
|
break;
|
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case PMCLOG_TYPE_PROCCSW:
|
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PMCSTAT_PRINT_LOG(a,"csw","0x%x %d %jd",
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ev.pl_u.pl_c.pl_pmcid,
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ev.pl_u.pl_c.pl_pid,
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ev.pl_u.pl_c.pl_value);
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break;
|
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case PMCLOG_TYPE_PROCEXEC:
|
|
PMCSTAT_PRINT_LOG(a,"exec","%d \"%s\"",
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ev.pl_u.pl_x.pl_pid,
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ev.pl_u.pl_x.pl_pathname);
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break;
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case PMCLOG_TYPE_PROCEXIT:
|
|
PMCSTAT_PRINT_LOG(a,"exitvalue","0x%x %d %jd",
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ev.pl_u.pl_e.pl_pmcid,
|
|
ev.pl_u.pl_e.pl_pid,
|
|
ev.pl_u.pl_e.pl_value);
|
|
break;
|
|
case PMCLOG_TYPE_PROCFORK:
|
|
PMCSTAT_PRINT_LOG(a,"fork","%d %d",
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|
ev.pl_u.pl_f.pl_oldpid,
|
|
ev.pl_u.pl_f.pl_newpid);
|
|
break;
|
|
case PMCLOG_TYPE_USERDATA:
|
|
PMCSTAT_PRINT_LOG(a,"user","0x%x",
|
|
ev.pl_u.pl_u.pl_userdata);
|
|
break;
|
|
case PMCLOG_TYPE_SYSEXIT:
|
|
PMCSTAT_PRINT_LOG(a,"exit","%d",
|
|
ev.pl_u.pl_se.pl_pid);
|
|
break;
|
|
default:
|
|
fprintf(a->pa_outputfile, "unknown %d",
|
|
ev.pl_type);
|
|
}
|
|
}
|
|
|
|
if (ev.pl_state == PMCLOG_EOF)
|
|
return PMCSTAT_FINISHED;
|
|
else if (ev.pl_state == PMCLOG_REQUIRE_DATA)
|
|
return PMCSTAT_RUNNING;
|
|
|
|
err(EX_DATAERR, "ERROR: event parsing failed "
|
|
"(record %jd, offset 0x%jx)",
|
|
(uintmax_t) ev.pl_count + 1, ev.pl_offset);
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
/*
|
|
* Close a logfile, after first flushing all in-module queued data.
|
|
*/
|
|
|
|
int
|
|
pmcstat_close_log(struct pmcstat_args *a)
|
|
{
|
|
if (pmc_flush_logfile() < 0 ||
|
|
pmc_configure_logfile(-1) < 0)
|
|
err(EX_OSERR, "ERROR: logging failed");
|
|
a->pa_flags &= ~FLAG_HAS_LOG_FILE;
|
|
return a->pa_flags & FLAG_HAS_PIPE ? PMCSTAT_EXITING :
|
|
PMCSTAT_FINISHED;
|
|
}
|
|
|
|
void
|
|
pmcstat_show_usage(void)
|
|
{
|
|
errx(EX_USAGE,
|
|
"[options] [commandline]\n"
|
|
"\t Measure process and/or system performance using hardware\n"
|
|
"\t performance monitoring counters.\n"
|
|
"\t Options include:\n"
|
|
"\t -C\t\t (toggle) show cumulative counts\n"
|
|
"\t -D path\t create profiles in directory \"path\"\n"
|
|
"\t -E\t\t (toggle) show counts at process exit\n"
|
|
"\t -O file\t send log output to \"file\"\n"
|
|
"\t -P spec\t allocate a process-private sampling PMC\n"
|
|
"\t -R file\t read events from \"file\"\n"
|
|
"\t -S spec\t allocate a system-wide sampling PMC\n"
|
|
"\t -W\t\t (toggle) show counts per context switch\n"
|
|
"\t -c cpu\t\t set cpu for subsequent system-wide PMCs\n"
|
|
"\t -d\t\t (toggle) track descendants\n"
|
|
"\t -g\t\t produce gprof(1) compatible profiles\n"
|
|
"\t -m\t\t merge gprof(1) profiles for executables\n"
|
|
"\t -n rate\t set sampling rate\n"
|
|
"\t -o file\t send print output to \"file\"\n"
|
|
"\t -p spec\t allocate a process-private counting PMC\n"
|
|
"\t -s spec\t allocate a system-wide counting PMC\n"
|
|
"\t -t pid\t\t attach to running process with pid \"pid\"\n"
|
|
"\t -w secs\t set printing time interval"
|
|
);
|
|
}
|
|
|
|
/*
|
|
* Main
|
|
*/
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
double interval;
|
|
int option, npmc, ncpu;
|
|
int c, current_cpu, current_sampling_count;
|
|
int do_print, do_descendants;
|
|
int do_logproccsw, do_logprocexit;
|
|
int logfd;
|
|
int pipefd[2];
|
|
int use_cumulative_counts;
|
|
pid_t pid;
|
|
char *end;
|
|
const char *errmsg;
|
|
enum pmcstat_state runstate;
|
|
struct pmcstat_ev *ev;
|
|
struct sigaction sa;
|
|
struct kevent kev;
|
|
struct winsize ws;
|
|
|
|
current_cpu = 0;
|
|
current_sampling_count = DEFAULT_SAMPLE_COUNT;
|
|
do_descendants = 0;
|
|
do_logproccsw = 0;
|
|
do_logprocexit = 0;
|
|
use_cumulative_counts = 0;
|
|
args.pa_required = 0;
|
|
args.pa_flags = 0;
|
|
args.pa_pid = (pid_t) -1;
|
|
args.pa_logfile = NULL;
|
|
args.pa_outputdir = NULL;
|
|
args.pa_outputfile = stderr;
|
|
args.pa_interval = DEFAULT_WAIT_INTERVAL;
|
|
STAILQ_INIT(&args.pa_head);
|
|
|
|
ev = NULL;
|
|
|
|
while ((option = getopt(argc, argv, "CD:EO:P:R:S:Wc:dgmn:o:p:s:t:w:"))
|
|
!= -1)
|
|
switch (option) {
|
|
case 'C': /* cumulative values */
|
|
use_cumulative_counts = !use_cumulative_counts;
|
|
args.pa_required |= FLAG_HAS_COUNTING_PMCS;
|
|
break;
|
|
|
|
case 'c': /* CPU */
|
|
current_cpu = strtol(optarg, &end, 0);
|
|
if (*end != '\0' || current_cpu < 0)
|
|
errx(EX_USAGE,
|
|
"ERROR: Illegal CPU number \"%s\".",
|
|
optarg);
|
|
args.pa_required |= FLAG_HAS_SYSTEM_PMCS;
|
|
break;
|
|
|
|
case 'd': /* toggle descendents */
|
|
do_descendants = !do_descendants;
|
|
args.pa_required |= FLAG_HAS_PROCESS_PMCS;
|
|
break;
|
|
|
|
case 'D':
|
|
args.pa_outputdir = optarg;
|
|
break;
|
|
|
|
case 'g': /* produce gprof compatible profiles */
|
|
args.pa_flags |= FLAG_DO_GPROF;
|
|
args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
|
|
break;
|
|
|
|
case 'm': /* produce merged profiles */
|
|
args.pa_flags |= FLAG_DO_GPROF_MERGED;
|
|
args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
|
|
break;
|
|
|
|
case 'E': /* log process exit */
|
|
do_logprocexit = !do_logprocexit;
|
|
args.pa_required |= (FLAG_HAS_PROCESS_PMCS |
|
|
FLAG_HAS_COUNTING_PMCS | FLAG_HAS_LOG_FILE);
|
|
break;
|
|
|
|
case 'p': /* process virtual counting PMC */
|
|
case 's': /* system-wide counting PMC */
|
|
case 'P': /* process virtual sampling PMC */
|
|
case 'S': /* system-wide sampling PMC */
|
|
if ((ev = malloc(sizeof(*ev))) == NULL)
|
|
errx(EX_SOFTWARE, "ERROR: Out of memory.");
|
|
|
|
switch (option) {
|
|
case 'p': ev->ev_mode = PMC_MODE_TC; break;
|
|
case 's': ev->ev_mode = PMC_MODE_SC; break;
|
|
case 'P': ev->ev_mode = PMC_MODE_TS; break;
|
|
case 'S': ev->ev_mode = PMC_MODE_SS; break;
|
|
}
|
|
|
|
if (option == 'P' || option == 'p') {
|
|
args.pa_flags |= FLAG_HAS_PROCESS_PMCS;
|
|
args.pa_required |= (FLAG_HAS_PROCESS |
|
|
FLAG_HAS_PID);
|
|
}
|
|
|
|
if (option == 'P' || option == 'S') {
|
|
args.pa_flags |= FLAG_HAS_SAMPLING_PMCS;
|
|
args.pa_required |= FLAG_HAS_LOG_FILE;
|
|
}
|
|
|
|
if (option == 'p' || option == 's')
|
|
args.pa_flags |= FLAG_HAS_COUNTING_PMCS;
|
|
|
|
if (option == 's' || option == 'S')
|
|
args.pa_flags |= FLAG_HAS_SYSTEM_PMCS;
|
|
|
|
ev->ev_spec = strdup(optarg);
|
|
|
|
if (option == 'S' || option == 'P')
|
|
ev->ev_count = current_sampling_count;
|
|
else
|
|
ev->ev_count = -1;
|
|
|
|
if (option == 'S' || option == 's')
|
|
ev->ev_cpu = current_cpu;
|
|
else
|
|
ev->ev_cpu = PMC_CPU_ANY;
|
|
|
|
ev->ev_flags = 0;
|
|
if (do_descendants)
|
|
ev->ev_flags |= PMC_F_DESCENDANTS;
|
|
if (do_logprocexit)
|
|
ev->ev_flags |= PMC_F_LOG_PROCEXIT;
|
|
if (do_logproccsw)
|
|
ev->ev_flags |= PMC_F_LOG_PROCCSW;
|
|
|
|
ev->ev_cumulative = use_cumulative_counts;
|
|
|
|
ev->ev_saved = 0LL;
|
|
ev->ev_pmcid = PMC_ID_INVALID;
|
|
|
|
/* extract event name */
|
|
c = strcspn(optarg, ", \t");
|
|
ev->ev_name = malloc(c + 1);
|
|
(void) strncpy(ev->ev_name, optarg, c);
|
|
*(ev->ev_name + c) = '\0';
|
|
|
|
STAILQ_INSERT_TAIL(&args.pa_head, ev, ev_next);
|
|
|
|
break;
|
|
|
|
case 'R': /* read an existing log file */
|
|
if ((logfd = open(optarg, O_RDONLY, 0)) < 0)
|
|
err(EX_OSERR, "ERROR: Cannot open \"%s\" for "
|
|
"reading", optarg);
|
|
if ((args.pa_logparser = pmclog_open(logfd))
|
|
== NULL)
|
|
err(EX_OSERR, "ERROR: Cannot create parser");
|
|
args.pa_flags |= FLAG_PROCESS_LOGFILE;
|
|
break;
|
|
|
|
case 'n': /* sampling count */
|
|
current_sampling_count = strtol(optarg, &end, 0);
|
|
if (*end != '\0' || current_sampling_count <= 0)
|
|
errx(EX_USAGE,
|
|
"ERROR: Illegal count value \"%s\".",
|
|
optarg);
|
|
args.pa_required |= FLAG_HAS_SAMPLING_PMCS;
|
|
break;
|
|
|
|
case 'o': /* outputfile */
|
|
if (args.pa_outputfile != NULL)
|
|
(void) fclose(args.pa_outputfile);
|
|
if ((args.pa_outputfile = fopen(optarg, "w")) == NULL)
|
|
errx(EX_OSERR, "ERROR: cannot open \"%s\" for "
|
|
"writing.", optarg);
|
|
args.pa_required |= FLAG_HAS_COUNTING_PMCS;
|
|
break;
|
|
|
|
case 'O': /* sampling output */
|
|
if (args.pa_logfile != NULL)
|
|
errx(EX_OSERR, "ERROR: option -O may only be "
|
|
"specified once.");
|
|
if ((args.pa_logfile = fopen(optarg, "w")) == NULL)
|
|
errx(EX_OSERR, "ERROR: cannot open \"%s\" for "
|
|
"writing.", optarg);
|
|
args.pa_flags |= FLAG_HAS_LOG_FILE;
|
|
break;
|
|
|
|
case 't': /* target pid */
|
|
pid = strtol(optarg, &end, 0);
|
|
if (*end != '\0' || pid <= 0)
|
|
errx(EX_USAGE, "ERROR: Illegal pid value "
|
|
"\"%s\".", optarg);
|
|
|
|
args.pa_flags |= FLAG_HAS_PID;
|
|
args.pa_required |= FLAG_HAS_PROCESS_PMCS;
|
|
args.pa_pid = pid;
|
|
break;
|
|
|
|
case 'w': /* wait interval */
|
|
interval = strtod(optarg, &end);
|
|
if (*end != '\0' || interval <= 0)
|
|
errx(EX_USAGE, "ERROR: Illegal wait interval "
|
|
"value \"%s\".", optarg);
|
|
args.pa_flags |= FLAG_HAS_WAIT_INTERVAL;
|
|
args.pa_interval = interval;
|
|
break;
|
|
|
|
case 'W': /* toggle LOG_CSW */
|
|
do_logproccsw = !do_logproccsw;
|
|
args.pa_required |= (FLAG_HAS_PROCESS_PMCS |
|
|
FLAG_HAS_COUNTING_PMCS | FLAG_HAS_LOG_FILE);
|
|
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 (args.pa_flags & FLAG_PROCESS_LOGFILE) {
|
|
errmsg = NULL;
|
|
if (args.pa_flags & FLAG_HAS_PROCESS)
|
|
errmsg = "a command line specification";
|
|
else if (args.pa_flags & FLAG_HAS_PID)
|
|
errmsg = "option -t";
|
|
else if (!STAILQ_EMPTY(&args.pa_head))
|
|
errmsg = "a PMC event specification";
|
|
if (errmsg)
|
|
errx(EX_USAGE, "ERROR: option -R may not be used with "
|
|
"%s.", errmsg);
|
|
} else if (STAILQ_EMPTY(&args.pa_head)) {
|
|
warnx("ERROR: At least one PMC event must be specified");
|
|
pmcstat_show_usage();
|
|
}
|
|
|
|
/* check for -t pid without a process PMC spec */
|
|
if ((args.pa_required & FLAG_HAS_PID) &&
|
|
(args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0)
|
|
errx(EX_USAGE, "ERROR: option -t requires a process mode PMC "
|
|
"to be specified.");
|
|
|
|
/* check for process-mode options without a command or -t pid */
|
|
if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
|
|
(args.pa_flags & (FLAG_HAS_PROCESS | FLAG_HAS_PID)) == 0)
|
|
errx(EX_USAGE, "ERROR: options -d,-E,-p,-P,-W require a "
|
|
"command line or target process.");
|
|
|
|
/* check for -p | -P without a target process of some sort */
|
|
if ((args.pa_required & (FLAG_HAS_PROCESS | FLAG_HAS_PID)) &&
|
|
(args.pa_flags & (FLAG_HAS_PROCESS | FLAG_HAS_PID)) == 0)
|
|
errx(EX_USAGE, "ERROR: the -P or -p options require a "
|
|
"target process or a command line.");
|
|
|
|
/* check for process-mode options without a process-mode PMC */
|
|
if ((args.pa_required & FLAG_HAS_PROCESS_PMCS) &&
|
|
(args.pa_flags & FLAG_HAS_PROCESS_PMCS) == 0)
|
|
errx(EX_USAGE, "ERROR: options -d,-E,-W require a "
|
|
"process mode PMC to be specified.");
|
|
|
|
/* check for -c cpu and not system mode PMCs */
|
|
if ((args.pa_required & FLAG_HAS_SYSTEM_PMCS) &&
|
|
(args.pa_flags & FLAG_HAS_SYSTEM_PMCS) == 0)
|
|
errx(EX_USAGE, "ERROR: option -c requires at least one "
|
|
"system mode PMC to be specified.");
|
|
|
|
/* check for counting mode options without a counting PMC */
|
|
if ((args.pa_required & FLAG_HAS_COUNTING_PMCS) &&
|
|
(args.pa_flags & FLAG_HAS_COUNTING_PMCS) == 0)
|
|
errx(EX_USAGE, "ERROR: options -C,-o,-W require at least one "
|
|
"counting mode PMC to be specified.");
|
|
|
|
/* check for sampling mode options without a sampling PMC spec */
|
|
if ((args.pa_required & FLAG_HAS_SAMPLING_PMCS) &&
|
|
(args.pa_flags & FLAG_HAS_SAMPLING_PMCS) == 0)
|
|
errx(EX_USAGE, "ERROR: options -n,-O require at least one "
|
|
"sampling mode PMC to be specified.");
|
|
|
|
if ((args.pa_flags & (FLAG_HAS_PID | FLAG_HAS_PROCESS)) ==
|
|
(FLAG_HAS_PID | FLAG_HAS_PROCESS))
|
|
errx(EX_USAGE,
|
|
"ERROR: option -t cannot be specified with a command "
|
|
"line.");
|
|
|
|
/* check if -O was spuriously specified */
|
|
if ((args.pa_flags & FLAG_HAS_LOG_FILE) &&
|
|
(args.pa_required & FLAG_HAS_LOG_FILE) == 0)
|
|
errx(EX_USAGE,
|
|
"ERROR: option -O is used only with options "
|
|
"-E,-P,-S and -W.");
|
|
|
|
/* if we've been asked to process a log file, do that and exit */
|
|
if (args.pa_flags & FLAG_PROCESS_LOGFILE) {
|
|
pmcstat_process_log(&args);
|
|
exit(EX_OK);
|
|
}
|
|
|
|
/* otherwise, we've been asked to collect data */
|
|
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.
|
|
*/
|
|
|
|
STAILQ_FOREACH(ev, &args.pa_head, ev_next)
|
|
if (pmc_allocate(ev->ev_spec, ev->ev_mode,
|
|
ev->ev_flags, 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 counter_width;
|
|
int display_width;
|
|
int header_width;
|
|
|
|
(void) pmc_width(ev->ev_pmcid, &counter_width);
|
|
header_width = strlen(ev->ev_name) + 2; /* prefix '%c|' */
|
|
display_width = (int) floor(counter_width / 3.32193) + 1;
|
|
|
|
if (header_width > display_width) {
|
|
ev->ev_fieldskip = 0;
|
|
ev->ev_fieldwidth = header_width;
|
|
} else {
|
|
ev->ev_fieldskip = display_width -
|
|
header_width;
|
|
ev->ev_fieldwidth = 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");
|
|
|
|
EV_SET(&kev, SIGIO, 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 SIGIO");
|
|
|
|
/*
|
|
* An exec() failure of a forked child is signalled by the
|
|
* child sending the parent a SIGCHLD. We don't register an
|
|
* actual signal handler for SIGCHLD, but instead use our
|
|
* kqueue to pick up the signal.
|
|
*/
|
|
EV_SET(&kev, SIGCHLD, 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 SIGCHLD");
|
|
|
|
/*
|
|
* Configure the specified log file or setup a default log
|
|
* consumer via a pipe.
|
|
*/
|
|
if (args.pa_required & FLAG_HAS_LOG_FILE) {
|
|
|
|
if (args.pa_logfile == NULL) {
|
|
if (pipe(pipefd) < 0)
|
|
err(EX_OSERR, "ERROR: pipe(2) failed");
|
|
|
|
EV_SET(&kev, pipefd[READPIPEFD], EVFILT_READ, EV_ADD,
|
|
0, 0, NULL);
|
|
|
|
if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0)
|
|
err(EX_OSERR, "ERROR: Cannot register kevent");
|
|
|
|
logfd = pipefd[WRITEPIPEFD];
|
|
|
|
args.pa_flags |= (FLAG_HAS_PIPE | FLAG_HAS_LOG_FILE);
|
|
args.pa_logparser = pmclog_open(pipefd[READPIPEFD]);
|
|
} else
|
|
logfd = fileno(args.pa_logfile);
|
|
|
|
if (pmc_configure_logfile(logfd) < 0)
|
|
err(EX_OSERR, "ERROR: Cannot configure log file");
|
|
|
|
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_HAS_COUNTING_PMCS) {
|
|
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.
|
|
*/
|
|
runstate = PMCSTAT_RUNNING;
|
|
do_print = 0;
|
|
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 has exited */
|
|
if (args.pa_flags & FLAG_HAS_LOG_FILE)
|
|
runstate = pmcstat_close_log(&args);
|
|
break;
|
|
|
|
case EVFILT_READ: /* log file data is present */
|
|
runstate = pmcstat_print_log(&args);
|
|
break;
|
|
|
|
case EVFILT_SIGNAL:
|
|
if (kev.ident == SIGCHLD) {
|
|
/*
|
|
* The child process sends us a
|
|
* SIGCHLD if its exec() failed. We
|
|
* wait for it to exit and then exit
|
|
* ourselves.
|
|
*/
|
|
(void) wait(&c);
|
|
runstate = PMCSTAT_FINISHED;
|
|
} else if (kev.ident == SIGIO) {
|
|
/*
|
|
* We get a SIGIO if a PMC loses all
|
|
* of its targets, or if logfile
|
|
* writes encounter an error.
|
|
*/
|
|
if (args.pa_flags & FLAG_HAS_LOG_FILE)
|
|
runstate = pmcstat_close_log(&args);
|
|
do_print = 1; /* print PMCs at exit */
|
|
runstate = PMCSTAT_FINISHED;
|
|
} else 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, "ERROR: cannot "
|
|
"signal child process");
|
|
runstate = PMCSTAT_FINISHED;
|
|
} 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;
|
|
|
|
case EVFILT_TIMER: /* print out counting PMCs */
|
|
do_print = 1;
|
|
break;
|
|
|
|
}
|
|
|
|
if (do_print) {
|
|
pmcstat_print_pmcs(&args);
|
|
if (runstate == PMCSTAT_FINISHED) /* final newline */
|
|
(void) fprintf(args.pa_outputfile, "\n");
|
|
do_print = 0;
|
|
}
|
|
|
|
} while (runstate != PMCSTAT_FINISHED);
|
|
|
|
/* flush any pending log entries */
|
|
if (args.pa_flags & FLAG_HAS_LOG_FILE)
|
|
pmc_flush_logfile();
|
|
|
|
pmcstat_cleanup(&args);
|
|
|
|
return 0;
|
|
}
|