/*- * Copyright (c) 2003-2008, Joseph Koshy * Copyright (c) 2007 The FreeBSD Foundation * All rights reserved. * * Portions of this software were developed by A. Joseph Koshy under * sponsorship from the FreeBSD Foundation and Google, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pmcstat.h" /* * A given invocation of pmcstat(8) can manage multiple PMCs of both * the system-wide and per-process variety. Each of these could be in * 'counting mode' or in 'sampling mode'. * * For 'counting mode' PMCs, pmcstat(8) will periodically issue a * pmc_read() at the configured time interval and print out the value * of the requested PMCs. * * For 'sampling mode' PMCs it can log to a file for offline analysis, * or can analyse sampling data "on the fly", either by converting * samples to printed textual form or by creating gprof(1) compatible * profiles, one per program executed. When creating gprof(1) * profiles it can optionally merge entries from multiple processes * for a given executable into a single profile file. * * pmcstat(8) can also execute a command line and attach PMCs to the * resulting child process. The protocol used is as follows: * * - parent creates a socketpair for two way communication and * fork()s. * - subsequently: * * /Parent/ /Child/ * * - Wait for childs token. * - Sends token. * - Awaits signal to start. * - Attaches PMCs to the child's pid * and starts them. Sets up * monitoring for the child. * - Signals child to start. * - Receives signal, attempts exec(). * * After this point normal processing can happen. */ /* Globals */ int pmcstat_displayheight = DEFAULT_DISPLAY_HEIGHT; int pmcstat_displaywidth = DEFAULT_DISPLAY_WIDTH; static int pmcstat_sockpair[NSOCKPAIRFD]; static int pmcstat_kq; static kvm_t *pmcstat_kvm; static struct kinfo_proc *pmcstat_plist; struct pmcstat_args args; static void pmcstat_clone_event_descriptor(struct pmcstat_ev *ev, const cpuset_t *cpumask) { int cpu, mcpu; struct pmcstat_ev *ev_clone; mcpu = sizeof(*cpumask) * NBBY; for (cpu = 0; cpu < mcpu; cpu++) { if (!CPU_ISSET(cpu, cpumask)) continue; if ((ev_clone = malloc(sizeof(*ev_clone))) == NULL) errx(EX_SOFTWARE, "ERROR: Out of memory"); (void) memset(ev_clone, 0, sizeof(*ev_clone)); ev_clone->ev_count = ev->ev_count; ev_clone->ev_cpu = cpu; ev_clone->ev_cumulative = ev->ev_cumulative; ev_clone->ev_flags = ev->ev_flags; ev_clone->ev_mode = ev->ev_mode; ev_clone->ev_name = strdup(ev->ev_name); ev_clone->ev_pmcid = ev->ev_pmcid; ev_clone->ev_saved = ev->ev_saved; ev_clone->ev_spec = strdup(ev->ev_spec); STAILQ_INSERT_TAIL(&args.pa_events, ev_clone, ev_next); } } static void pmcstat_get_cpumask(const char *cpuspec, cpuset_t *cpumask) { int cpu; const char *s; char *end; CPU_ZERO(cpumask); s = cpuspec; do { cpu = strtol(s, &end, 0); if (cpu < 0 || end == s) errx(EX_USAGE, "ERROR: Illegal CPU specification \"%s\".", cpuspec); CPU_SET(cpu, cpumask); s = end + strspn(end, ", \t"); } while (*s); } void pmcstat_attach_pmcs(void) { struct pmcstat_ev *ev; struct pmcstat_target *pt; int count; /* Attach all process PMCs to target processes. */ count = 0; STAILQ_FOREACH(ev, &args.pa_events, ev_next) { if (PMC_IS_SYSTEM_MODE(ev->ev_mode)) continue; SLIST_FOREACH(pt, &args.pa_targets, pt_next) if (pmc_attach(ev->ev_pmcid, pt->pt_pid) == 0) count++; else if (errno != ESRCH) err(EX_OSERR, "ERROR: cannot attach pmc \"%s\" to process %d", ev->ev_name, (int)pt->pt_pid); } if (count == 0) errx(EX_DATAERR, "ERROR: No processes were attached to."); } void pmcstat_cleanup(void) { struct pmcstat_ev *ev, *tmp; /* release allocated PMCs. */ STAILQ_FOREACH_SAFE(ev, &args.pa_events, ev_next, tmp) if (ev->ev_pmcid != PMC_ID_INVALID) { if (pmc_stop(ev->ev_pmcid) < 0) err(EX_OSERR, "ERROR: cannot stop pmc 0x%x \"%s\"", ev->ev_pmcid, ev->ev_name); if (pmc_release(ev->ev_pmcid) < 0) err(EX_OSERR, "ERROR: cannot release pmc 0x%x \"%s\"", ev->ev_pmcid, ev->ev_name); free(ev->ev_name); free(ev->ev_spec); STAILQ_REMOVE(&args.pa_events, ev, pmcstat_ev, ev_next); free(ev); } /* de-configure the log file if present. */ if (args.pa_flags & (FLAG_HAS_PIPE | FLAG_HAS_OUTPUT_LOGFILE)) (void) pmc_configure_logfile(-1); if (args.pa_logparser) { pmclog_close(args.pa_logparser); args.pa_logparser = NULL; } pmcstat_shutdown_logging(); } void pmcstat_create_process(void) { char token; pid_t pid; struct kevent kev; struct pmcstat_target *pt; if (socketpair(AF_UNIX, SOCK_STREAM, 0, pmcstat_sockpair) < 0) err(EX_OSERR, "ERROR: cannot create socket pair"); switch (pid = fork()) { case -1: err(EX_OSERR, "ERROR: cannot fork"); /*NOTREACHED*/ case 0: /* child */ (void) close(pmcstat_sockpair[PARENTSOCKET]); /* Write a token to tell our parent we've started executing. */ if (write(pmcstat_sockpair[CHILDSOCKET], "+", 1) != 1) err(EX_OSERR, "ERROR (child): cannot write token"); /* Wait for our parent to signal us to start. */ if (read(pmcstat_sockpair[CHILDSOCKET], &token, 1) < 0) err(EX_OSERR, "ERROR (child): cannot read token"); (void) close(pmcstat_sockpair[CHILDSOCKET]); /* exec() the program requested */ execvp(*args.pa_argv, args.pa_argv); /* and if that fails, notify the parent */ kill(getppid(), SIGCHLD); err(EX_OSERR, "ERROR: execvp \"%s\" failed", *args.pa_argv); /*NOTREACHED*/ default: /* parent */ (void) close(pmcstat_sockpair[CHILDSOCKET]); break; } /* Ask to be notified via a kevent when the target process exits. */ EV_SET(&kev, pid, EVFILT_PROC, EV_ADD|EV_ONESHOT, NOTE_EXIT, 0, NULL); if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) err(EX_OSERR, "ERROR: cannot monitor child process %d", pid); if ((pt = malloc(sizeof(*pt))) == NULL) errx(EX_SOFTWARE, "ERROR: Out of memory."); pt->pt_pid = pid; SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next); /* Wait for the child to signal that its ready to go. */ if (read(pmcstat_sockpair[PARENTSOCKET], &token, 1) < 0) err(EX_OSERR, "ERROR (parent): cannot read token"); return; } void pmcstat_find_targets(const char *spec) { int n, nproc, pid, rv; struct pmcstat_target *pt; char errbuf[_POSIX2_LINE_MAX], *end; static struct kinfo_proc *kp; regex_t reg; regmatch_t regmatch; /* First check if we've been given a process id. */ pid = strtol(spec, &end, 0); if (end != spec && pid >= 0) { if ((pt = malloc(sizeof(*pt))) == NULL) goto outofmemory; pt->pt_pid = pid; SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next); return; } /* Otherwise treat arg as a regular expression naming processes. */ if (pmcstat_kvm == NULL) { if ((pmcstat_kvm = kvm_openfiles(NULL, "/dev/null", NULL, 0, errbuf)) == NULL) err(EX_OSERR, "ERROR: Cannot open kernel \"%s\"", errbuf); if ((pmcstat_plist = kvm_getprocs(pmcstat_kvm, KERN_PROC_PROC, 0, &nproc)) == NULL) err(EX_OSERR, "ERROR: Cannot get process list: %s", kvm_geterr(pmcstat_kvm)); } else nproc = 0; if ((rv = regcomp(®, spec, REG_EXTENDED|REG_NOSUB)) != 0) { regerror(rv, ®, errbuf, sizeof(errbuf)); err(EX_DATAERR, "ERROR: Failed to compile regex \"%s\": %s", spec, errbuf); } for (n = 0, kp = pmcstat_plist; n < nproc; n++, kp++) { if ((rv = regexec(®, kp->ki_comm, 1, ®match, 0)) == 0) { if ((pt = malloc(sizeof(*pt))) == NULL) goto outofmemory; pt->pt_pid = kp->ki_pid; SLIST_INSERT_HEAD(&args.pa_targets, pt, pt_next); } else if (rv != REG_NOMATCH) { regerror(rv, ®, errbuf, sizeof(errbuf)); errx(EX_SOFTWARE, "ERROR: Regex evalation failed: %s", errbuf); } } regfree(®); return; outofmemory: errx(EX_SOFTWARE, "Out of memory."); /*NOTREACHED*/ } void pmcstat_kill_process(void) { struct pmcstat_target *pt; assert(args.pa_flags & FLAG_HAS_COMMANDLINE); /* * If a command line was specified, it would be the very first * in the list, before any other processes specified by -t. */ pt = SLIST_FIRST(&args.pa_targets); assert(pt != NULL); if (kill(pt->pt_pid, SIGINT) != 0) err(EX_OSERR, "ERROR: cannot signal child process"); } void pmcstat_start_pmcs(void) { struct pmcstat_ev *ev; STAILQ_FOREACH(ev, &args.pa_events, ev_next) { assert(ev->ev_pmcid != PMC_ID_INVALID); if (pmc_start(ev->ev_pmcid) < 0) { warn("ERROR: Cannot start pmc 0x%x \"%s\"", ev->ev_pmcid, ev->ev_name); pmcstat_cleanup(); exit(EX_OSERR); } } } void pmcstat_print_headers(void) { struct pmcstat_ev *ev; int c, w; (void) fprintf(args.pa_printfile, PRINT_HEADER_PREFIX); STAILQ_FOREACH(ev, &args.pa_events, ev_next) { if (PMC_IS_SAMPLING_MODE(ev->ev_mode)) continue; c = PMC_IS_SYSTEM_MODE(ev->ev_mode) ? 's' : 'p'; if (ev->ev_fieldskip != 0) (void) fprintf(args.pa_printfile, "%*s", ev->ev_fieldskip, ""); w = ev->ev_fieldwidth - ev->ev_fieldskip - 2; if (c == 's') (void) fprintf(args.pa_printfile, "s/%02d/%-*s ", ev->ev_cpu, w-3, ev->ev_name); else (void) fprintf(args.pa_printfile, "p/%*s ", w, ev->ev_name); } (void) fflush(args.pa_printfile); } void pmcstat_print_counters(void) { int extra_width; struct pmcstat_ev *ev; pmc_value_t value; extra_width = sizeof(PRINT_HEADER_PREFIX) - 1; STAILQ_FOREACH(ev, &args.pa_events, ev_next) { /* skip sampling mode counters */ if (PMC_IS_SAMPLING_MODE(ev->ev_mode)) continue; if (pmc_read(ev->ev_pmcid, &value) < 0) err(EX_OSERR, "ERROR: Cannot read pmc \"%s\"", ev->ev_name); (void) fprintf(args.pa_printfile, "%*ju ", ev->ev_fieldwidth + extra_width, (uintmax_t) ev->ev_cumulative ? value : (value - ev->ev_saved)); if (ev->ev_cumulative == 0) ev->ev_saved = value; extra_width = 0; } (void) fflush(args.pa_printfile); } /* * Print output */ void pmcstat_print_pmcs(void) { static int linecount = 0; /* check if we need to print a header line */ if (++linecount > pmcstat_displayheight) { (void) fprintf(args.pa_printfile, "\n"); linecount = 1; } if (linecount == 1) pmcstat_print_headers(); (void) fprintf(args.pa_printfile, "\n"); pmcstat_print_counters(); return; } /* * Do process profiling * * If a pid was specified, attach each allocated PMC to the target * process. Otherwise, fork a child and attach the PMCs to the child, * and have the child exec() the target program. */ void pmcstat_start_process(void) { /* Signal the child to proceed. */ if (write(pmcstat_sockpair[PARENTSOCKET], "!", 1) != 1) err(EX_OSERR, "ERROR (parent): write of token failed"); (void) close(pmcstat_sockpair[PARENTSOCKET]); } 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 -F file\t write a system-wide callgraph (Kcachegrind format)" " to \"file\"\n" "\t -G file\t write a system-wide callgraph to \"file\"\n" "\t -M file\t print executable/gmon file map to \"file\"\n" "\t -N\t\t (toggle) capture callchains\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 -T\t\t start in top mode\n" "\t -W\t\t (toggle) show counts per context switch\n" "\t -a \t print sampled PCs and callgraph to \"file\"\n" "\t -c cpu-list\t set cpus for subsequent system-wide PMCs\n" "\t -d\t\t (toggle) track descendants\n" "\t -f spec\t pass \"spec\" to as plugin option\n" "\t -g\t\t produce gprof(1) compatible profiles\n" "\t -k dir\t\t set the path to the kernel\n" "\t -l secs\t set duration time\n" "\t -m file\t print sampled PCs to \"file\"\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 -q\t\t suppress verbosity\n" "\t -r fsroot\t specify FS root directory\n" "\t -s spec\t allocate a system-wide counting PMC\n" "\t -t process-spec attach to running processes matching " "\"process-spec\"\n" "\t -v\t\t increase verbosity\n" "\t -w secs\t set printing time interval\n" "\t -z depth\t limit callchain display depth" ); } /* * At exit handler for top mode */ void pmcstat_topexit(void) { if (!args.pa_toptty) return; /* * Shutdown ncurses. */ clrtoeol(); refresh(); endwin(); } /* * Main */ int main(int argc, char **argv) { cpuset_t cpumask; double interval; double duration; int hcpu, option, npmc, ncpu; int c, check_driver_stats, current_sampling_count; int do_callchain, do_descendants, do_logproccsw, do_logprocexit; int do_print, do_read; size_t dummy; int graphdepth; int pipefd[2], rfd; int use_cumulative_counts; short cf, cb; char *end, *tmp; const char *errmsg, *graphfilename; enum pmcstat_state runstate; struct pmc_driverstats ds_start, ds_end; struct pmcstat_ev *ev; struct sigaction sa; struct kevent kev; struct winsize ws; struct stat sb; char buffer[PATH_MAX]; check_driver_stats = 0; current_sampling_count = DEFAULT_SAMPLE_COUNT; do_callchain = 1; do_descendants = 0; do_logproccsw = 0; do_logprocexit = 0; use_cumulative_counts = 0; graphfilename = "-"; args.pa_required = 0; args.pa_flags = 0; args.pa_verbosity = 1; args.pa_logfd = -1; args.pa_fsroot = ""; args.pa_kernel = strdup("/boot/kernel"); args.pa_samplesdir = "."; args.pa_printfile = stderr; args.pa_graphdepth = DEFAULT_CALLGRAPH_DEPTH; args.pa_graphfile = NULL; args.pa_interval = DEFAULT_WAIT_INTERVAL; args.pa_mapfilename = NULL; args.pa_inputpath = NULL; args.pa_outputpath = NULL; args.pa_pplugin = PMCSTAT_PL_NONE; args.pa_plugin = PMCSTAT_PL_NONE; args.pa_ctdumpinstr = 1; args.pa_topmode = PMCSTAT_TOP_DELTA; args.pa_toptty = 0; args.pa_topcolor = 0; args.pa_mergepmc = 0; args.pa_duration = 0.0; STAILQ_INIT(&args.pa_events); SLIST_INIT(&args.pa_targets); bzero(&ds_start, sizeof(ds_start)); bzero(&ds_end, sizeof(ds_end)); ev = NULL; CPU_ZERO(&cpumask); /* * The initial CPU mask specifies all non-halted CPUS in the * system. */ dummy = sizeof(int); if (sysctlbyname("hw.ncpu", &ncpu, &dummy, NULL, 0) < 0) err(EX_OSERR, "ERROR: Cannot determine the number of CPUs"); for (hcpu = 0; hcpu < ncpu; hcpu++) CPU_SET(hcpu, &cpumask); while ((option = getopt(argc, argv, "CD:EF:G:M:NO:P:R:S:TWa:c:df:gk:l:m:n:o:p:qr:s:t:vw:z:")) != -1) switch (option) { case 'a': /* Annotate + callgraph */ args.pa_flags |= FLAG_DO_ANNOTATE; args.pa_plugin = PMCSTAT_PL_ANNOTATE_CG; graphfilename = optarg; break; case 'C': /* cumulative values */ use_cumulative_counts = !use_cumulative_counts; args.pa_required |= FLAG_HAS_COUNTING_PMCS; break; case 'c': /* CPU */ if (optarg[0] == '*' && optarg[1] == '\0') { for (hcpu = 0; hcpu < ncpu; hcpu++) CPU_SET(hcpu, &cpumask); } else pmcstat_get_cpumask(optarg, &cpumask); args.pa_flags |= FLAGS_HAS_CPUMASK; args.pa_required |= FLAG_HAS_SYSTEM_PMCS; break; case 'D': if (stat(optarg, &sb) < 0) err(EX_OSERR, "ERROR: Cannot stat \"%s\"", optarg); if (!S_ISDIR(sb.st_mode)) errx(EX_USAGE, "ERROR: \"%s\" is not a directory.", optarg); args.pa_samplesdir = optarg; args.pa_flags |= FLAG_HAS_SAMPLESDIR; args.pa_required |= FLAG_DO_GPROF; break; case 'd': /* toggle descendents */ do_descendants = !do_descendants; args.pa_required |= FLAG_HAS_PROCESS_PMCS; break; case 'F': /* produce a system-wide calltree */ args.pa_flags |= FLAG_DO_CALLGRAPHS; args.pa_plugin = PMCSTAT_PL_CALLTREE; graphfilename = optarg; break; case 'f': /* plugins options */ if (args.pa_plugin == PMCSTAT_PL_NONE) err(EX_USAGE, "ERROR: Need -g/-G/-m/-T."); pmcstat_pluginconfigure_log(optarg); break; case 'G': /* produce a system-wide callgraph */ args.pa_flags |= FLAG_DO_CALLGRAPHS; args.pa_plugin = PMCSTAT_PL_CALLGRAPH; graphfilename = optarg; break; case 'g': /* produce gprof compatible profiles */ args.pa_flags |= FLAG_DO_GPROF; args.pa_pplugin = PMCSTAT_PL_CALLGRAPH; args.pa_plugin = PMCSTAT_PL_GPROF; break; case 'k': /* pathname to the kernel */ free(args.pa_kernel); args.pa_kernel = strdup(optarg); args.pa_required |= FLAG_DO_ANALYSIS; args.pa_flags |= FLAG_HAS_KERNELPATH; break; case 'l': /* time duration in seconds */ duration = strtod(optarg, &end); if (*end != '\0' || duration <= 0) errx(EX_USAGE, "ERROR: Illegal duration time " "value \"%s\".", optarg); args.pa_flags |= FLAG_HAS_DURATION; args.pa_duration = duration; break; case 'm': args.pa_flags |= FLAG_DO_ANNOTATE; args.pa_plugin = PMCSTAT_PL_ANNOTATE; graphfilename = optarg; break; case 'E': /* log process exit */ do_logprocexit = !do_logprocexit; args.pa_required |= (FLAG_HAS_PROCESS_PMCS | FLAG_HAS_COUNTING_PMCS | FLAG_HAS_OUTPUT_LOGFILE); break; case 'M': /* mapfile */ args.pa_mapfilename = optarg; break; case 'N': do_callchain = !do_callchain; args.pa_required |= FLAG_HAS_SAMPLING_PMCS; 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_COMMANDLINE | FLAG_HAS_TARGET); } if (option == 'P' || option == 'S') { args.pa_flags |= FLAG_HAS_SAMPLING_PMCS; args.pa_required |= (FLAG_HAS_PIPE | FLAG_HAS_OUTPUT_LOGFILE); } 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') { hcpu = sizeof(cpumask) * NBBY; for (hcpu--; hcpu >= 0; hcpu--) if (CPU_ISSET(hcpu, &cpumask)) break; ev->ev_cpu = hcpu; } else ev->ev_cpu = PMC_CPU_ANY; ev->ev_flags = 0; if (do_callchain) ev->ev_flags |= PMC_F_CALLCHAIN; 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_events, ev, ev_next); if (option == 's' || option == 'S') { hcpu = CPU_ISSET(ev->ev_cpu, &cpumask); CPU_CLR(ev->ev_cpu, &cpumask); pmcstat_clone_event_descriptor(ev, &cpumask); if (hcpu != 0) CPU_SET(ev->ev_cpu, &cpumask); } 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_printfile != NULL && args.pa_printfile != stdout && args.pa_printfile != stderr) (void) fclose(args.pa_printfile); if ((args.pa_printfile = fopen(optarg, "w")) == NULL) errx(EX_OSERR, "ERROR: cannot open \"%s\" for writing.", optarg); args.pa_flags |= FLAG_DO_PRINT; break; case 'O': /* sampling output */ if (args.pa_outputpath) errx(EX_USAGE, "ERROR: option -O may only be specified once."); args.pa_outputpath = optarg; args.pa_flags |= FLAG_HAS_OUTPUT_LOGFILE; break; case 'q': /* quiet mode */ args.pa_verbosity = 0; break; case 'r': /* root FS path */ args.pa_fsroot = optarg; break; case 'R': /* read an existing log file */ if (args.pa_inputpath != NULL) errx(EX_USAGE, "ERROR: option -R may only be specified once."); args.pa_inputpath = optarg; if (args.pa_printfile == stderr) args.pa_printfile = stdout; args.pa_flags |= FLAG_READ_LOGFILE; break; case 't': /* target pid or process name */ pmcstat_find_targets(optarg); args.pa_flags |= FLAG_HAS_TARGET; args.pa_required |= FLAG_HAS_PROCESS_PMCS; break; case 'T': /* top mode */ args.pa_flags |= FLAG_DO_TOP; args.pa_plugin = PMCSTAT_PL_CALLGRAPH; args.pa_ctdumpinstr = 0; args.pa_mergepmc = 1; if (args.pa_printfile == stderr) args.pa_printfile = stdout; break; case 'v': /* verbose */ args.pa_verbosity++; 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_OUTPUT_LOGFILE); break; case 'z': graphdepth = strtod(optarg, &end); if (*end != '\0' || graphdepth <= 0) errx(EX_USAGE, "ERROR: Illegal callchain depth \"%s\".", optarg); args.pa_graphdepth = graphdepth; args.pa_required |= FLAG_DO_CALLGRAPHS; break; case '?': default: pmcstat_show_usage(); break; } args.pa_argc = (argc -= optind); args.pa_argv = (argv += optind); /* If we read from logfile and no specified CPU mask use * the maximum CPU count. */ if ((args.pa_flags & FLAG_READ_LOGFILE) && (args.pa_flags & FLAGS_HAS_CPUMASK) == 0) CPU_FILL(&cpumask); args.pa_cpumask = cpumask; /* For selecting CPUs using -R. */ if (argc) /* command line present */ args.pa_flags |= FLAG_HAS_COMMANDLINE; if (args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS | FLAG_DO_ANNOTATE | FLAG_DO_TOP)) args.pa_flags |= FLAG_DO_ANALYSIS; /* * Check invocation syntax. */ /* disallow -O and -R together */ if (args.pa_outputpath && args.pa_inputpath) errx(EX_USAGE, "ERROR: options -O and -R are mutually exclusive."); /* disallow -T and -l together */ if ((args.pa_flags & FLAG_HAS_DURATION) && (args.pa_flags & FLAG_DO_TOP)) errx(EX_USAGE, "ERROR: options -T and -l are mutually " "exclusive."); /* -m option is allowed with -R only. */ if (args.pa_flags & FLAG_DO_ANNOTATE && args.pa_inputpath == NULL) errx(EX_USAGE, "ERROR: option %s requires an input file", args.pa_plugin == PMCSTAT_PL_ANNOTATE ? "-m" : "-a"); /* -m option is not allowed combined with -g or -G. */ if (args.pa_flags & FLAG_DO_ANNOTATE && args.pa_flags & (FLAG_DO_GPROF | FLAG_DO_CALLGRAPHS)) errx(EX_USAGE, "ERROR: option -m and -g | -G are mutually exclusive"); if (args.pa_flags & FLAG_READ_LOGFILE) { errmsg = NULL; if (args.pa_flags & FLAG_HAS_COMMANDLINE) errmsg = "a command line specification"; else if (args.pa_flags & FLAG_HAS_TARGET) errmsg = "option -t"; else if (!STAILQ_EMPTY(&args.pa_events)) 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_events)) /* All other uses require a PMC spec. */ pmcstat_show_usage(); /* check for -t pid without a process PMC spec */ if ((args.pa_required & FLAG_HAS_TARGET) && (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_COMMANDLINE | FLAG_HAS_TARGET)) == 0) errx(EX_USAGE, "ERROR: options -d, -E, -p, -P, and -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_COMMANDLINE | FLAG_HAS_TARGET)) && (args.pa_flags & (FLAG_HAS_COMMANDLINE | FLAG_HAS_TARGET)) == 0) errx(EX_USAGE, "ERROR: options -P and -p 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, and -W require a process mode PMC to be specified." ); /* check for -c cpu with no system mode PMCs or logfile. */ if ((args.pa_required & FLAG_HAS_SYSTEM_PMCS) && (args.pa_flags & FLAG_HAS_SYSTEM_PMCS) == 0 && (args.pa_flags & FLAG_READ_LOGFILE) == 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, -W and -o 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, -n and -O require at least one sampling mode PMC to be specified." ); /* check if -g/-G/-m/-T are being used correctly */ if ((args.pa_flags & FLAG_DO_ANALYSIS) && !(args.pa_flags & (FLAG_HAS_SAMPLING_PMCS|FLAG_READ_LOGFILE))) errx(EX_USAGE, "ERROR: options -g/-G/-m/-T require sampling PMCs or -R to be specified." ); /* check if -O was spuriously specified */ if ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) && (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) errx(EX_USAGE, "ERROR: option -O is used only with options -E, -P, -S and -W." ); /* -k kernel path require -g/-G/-m/-T or -R */ if ((args.pa_flags & FLAG_HAS_KERNELPATH) && (args.pa_flags & FLAG_DO_ANALYSIS) == 0 && (args.pa_flags & FLAG_READ_LOGFILE) == 0) errx(EX_USAGE, "ERROR: option -k is only used with -g/-R/-m/-T."); /* -D only applies to gprof output mode (-g) */ if ((args.pa_flags & FLAG_HAS_SAMPLESDIR) && (args.pa_flags & FLAG_DO_GPROF) == 0) errx(EX_USAGE, "ERROR: option -D is only used with -g."); /* -M mapfile requires -g or -R */ if (args.pa_mapfilename != NULL && (args.pa_flags & FLAG_DO_GPROF) == 0 && (args.pa_flags & FLAG_READ_LOGFILE) == 0) errx(EX_USAGE, "ERROR: option -M is only used with -g/-R."); /* * Disallow textual output of sampling PMCs if counting PMCs * have also been asked for, mostly because the combined output * is difficult to make sense of. */ if ((args.pa_flags & FLAG_HAS_COUNTING_PMCS) && (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) && ((args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE) == 0)) errx(EX_USAGE, "ERROR: option -O is required if counting and sampling PMCs are specified together." ); /* * Check if "-k kerneldir" was specified, and if whether * 'kerneldir' actually refers to a file. If so, use * `dirname path` to determine the kernel directory. */ if (args.pa_flags & FLAG_HAS_KERNELPATH) { (void) snprintf(buffer, sizeof(buffer), "%s%s", args.pa_fsroot, args.pa_kernel); if (stat(buffer, &sb) < 0) err(EX_OSERR, "ERROR: Cannot locate kernel \"%s\"", buffer); if (!S_ISREG(sb.st_mode) && !S_ISDIR(sb.st_mode)) errx(EX_USAGE, "ERROR: \"%s\": Unsupported file type.", buffer); if (!S_ISDIR(sb.st_mode)) { tmp = args.pa_kernel; args.pa_kernel = strdup(dirname(args.pa_kernel)); free(tmp); (void) snprintf(buffer, sizeof(buffer), "%s%s", args.pa_fsroot, args.pa_kernel); if (stat(buffer, &sb) < 0) err(EX_OSERR, "ERROR: Cannot stat \"%s\"", buffer); if (!S_ISDIR(sb.st_mode)) errx(EX_USAGE, "ERROR: \"%s\" is not a directory.", buffer); } } /* * If we have a callgraph be created, select the outputfile. */ if (args.pa_flags & FLAG_DO_CALLGRAPHS) { if (strcmp(graphfilename, "-") == 0) args.pa_graphfile = args.pa_printfile; else { args.pa_graphfile = fopen(graphfilename, "w"); if (args.pa_graphfile == NULL) err(EX_OSERR, "ERROR: cannot open \"%s\" for writing", graphfilename); } } if (args.pa_flags & FLAG_DO_ANNOTATE) { args.pa_graphfile = fopen(graphfilename, "w"); if (args.pa_graphfile == NULL) err(EX_OSERR, "ERROR: cannot open \"%s\" for writing", graphfilename); } /* if we've been asked to process a log file, skip init */ if ((args.pa_flags & FLAG_READ_LOGFILE) == 0) { if (pmc_init() < 0) err(EX_UNAVAILABLE, "ERROR: Initialization of the pmc(3) library failed" ); 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 a kqueue */ if ((pmcstat_kq = kqueue()) < 0) err(EX_OSERR, "ERROR: Cannot allocate kqueue"); /* Setup the logfile as the source. */ if (args.pa_flags & FLAG_READ_LOGFILE) { /* * Print the log in textual form if we haven't been * asked to generate profiling information. */ if ((args.pa_flags & FLAG_DO_ANALYSIS) == 0) args.pa_flags |= FLAG_DO_PRINT; pmcstat_initialize_logging(); rfd = pmcstat_open_log(args.pa_inputpath, PMCSTAT_OPEN_FOR_READ); if ((args.pa_logparser = pmclog_open(rfd)) == NULL) err(EX_OSERR, "ERROR: Cannot create parser"); if (fcntl(rfd, F_SETFL, O_NONBLOCK) < 0) err(EX_OSERR, "ERROR: fcntl(2) failed"); EV_SET(&kev, rfd, EVFILT_READ, EV_ADD, 0, 0, NULL); if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) err(EX_OSERR, "ERROR: Cannot register kevent"); } /* * Configure the specified log file or setup a default log * consumer via a pipe. */ if (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) { if (args.pa_outputpath) args.pa_logfd = pmcstat_open_log(args.pa_outputpath, PMCSTAT_OPEN_FOR_WRITE); else { /* * process the log on the fly by reading it in * through a pipe. */ if (pipe(pipefd) < 0) err(EX_OSERR, "ERROR: pipe(2) failed"); if (fcntl(pipefd[READPIPEFD], F_SETFL, O_NONBLOCK) < 0) err(EX_OSERR, "ERROR: fcntl(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"); args.pa_logfd = pipefd[WRITEPIPEFD]; args.pa_flags |= FLAG_HAS_PIPE; if ((args.pa_flags & FLAG_DO_TOP) == 0) args.pa_flags |= FLAG_DO_PRINT; args.pa_logparser = pmclog_open(pipefd[READPIPEFD]); } if (pmc_configure_logfile(args.pa_logfd) < 0) err(EX_OSERR, "ERROR: Cannot configure log file"); } /* remember to check for driver errors if we are sampling or logging */ check_driver_stats = (args.pa_flags & FLAG_HAS_SAMPLING_PMCS) || (args.pa_flags & FLAG_HAS_OUTPUT_LOGFILE); /* if (args.pa_flags & FLAG_READ_LOGFILE) { * Allocate PMCs. */ STAILQ_FOREACH(ev, &args.pa_events, 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); 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); } /* compute printout widths */ STAILQ_FOREACH(ev, &args.pa_events, 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 (PMC_IS_SYSTEM_MODE(ev->ev_mode)) header_width += 3; /* 2 digit CPU number + '/' */ 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; } } /* * If our output is being set to a terminal, register a handler * for window size changes. */ if (isatty(fileno(args.pa_printfile))) { if (ioctl(fileno(args.pa_printfile), TIOCGWINSZ, &ws) < 0) err(EX_OSERR, "ERROR: Cannot determine window size"); pmcstat_displayheight = ws.ws_row - 1; pmcstat_displaywidth = ws.ws_col - 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"); args.pa_toptty = 1; } /* * Listen to key input in top mode. */ if (args.pa_flags & FLAG_DO_TOP) { EV_SET(&kev, fileno(stdin), EVFILT_READ, EV_ADD, 0, 0, NULL); if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) err(EX_OSERR, "ERROR: Cannot register kevent"); } 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"); /* * Setup a timer if we have counting mode PMCs needing to be printed or * top mode plugin is active. */ if (((args.pa_flags & FLAG_HAS_COUNTING_PMCS) && (args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) || (args.pa_flags & FLAG_DO_TOP)) { 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"); } /* * Setup a duration timer if we have sampling mode PMCs and * a duration time is set */ if ((args.pa_flags & FLAG_HAS_SAMPLING_PMCS) && (args.pa_flags & FLAG_HAS_DURATION)) { EV_SET(&kev, 0, EVFILT_TIMER, EV_ADD, 0, args.pa_duration * 1000, NULL); if (kevent(pmcstat_kq, &kev, 1, NULL, 0, NULL) < 0) err(EX_OSERR, "ERROR: Cannot register kevent for " "time duration"); } /* attach PMCs to the target process, starting it if specified */ if (args.pa_flags & FLAG_HAS_COMMANDLINE) pmcstat_create_process(); if (check_driver_stats && pmc_get_driver_stats(&ds_start) < 0) err(EX_OSERR, "ERROR: Cannot retrieve driver statistics"); /* Attach process pmcs to the target process. */ if (args.pa_flags & (FLAG_HAS_TARGET | FLAG_HAS_COMMANDLINE)) { if (SLIST_EMPTY(&args.pa_targets)) errx(EX_DATAERR, "ERROR: No matching target processes."); if (args.pa_flags & FLAG_HAS_PROCESS_PMCS) pmcstat_attach_pmcs(); if (pmcstat_kvm) { kvm_close(pmcstat_kvm); pmcstat_kvm = NULL; } } /* start the pmcs */ pmcstat_start_pmcs(); /* start the (commandline) process if needed */ if (args.pa_flags & FLAG_HAS_COMMANDLINE) pmcstat_start_process(); /* initialize logging */ pmcstat_initialize_logging(); /* 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"); /* * Setup the top mode display. */ if (args.pa_flags & FLAG_DO_TOP) { args.pa_flags &= ~FLAG_DO_PRINT; if (args.pa_toptty) { /* * Init ncurses. */ initscr(); if(has_colors() == TRUE) { args.pa_topcolor = 1; start_color(); use_default_colors(); pair_content(0, &cf, &cb); init_pair(1, COLOR_RED, cb); init_pair(2, COLOR_YELLOW, cb); init_pair(3, COLOR_GREEN, cb); } cbreak(); noecho(); nonl(); nodelay(stdscr, 1); intrflush(stdscr, FALSE); keypad(stdscr, TRUE); clear(); /* Get terminal width / height with ncurses. */ getmaxyx(stdscr, pmcstat_displayheight, pmcstat_displaywidth); pmcstat_displayheight--; pmcstat_displaywidth--; atexit(pmcstat_topexit); } } /* * loop till either the target process (if any) exits, or we * are killed by a SIGINT or we reached the time duration. */ runstate = PMCSTAT_RUNNING; do_print = do_read = 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 */ runstate = pmcstat_close_log(); do_print = 1; break; case EVFILT_READ: /* log file data is present */ if (kev.ident == (unsigned)fileno(stdin) && (args.pa_flags & FLAG_DO_TOP)) { if (pmcstat_keypress_log()) runstate = pmcstat_close_log(); } else { do_read = 0; runstate = pmcstat_process_log(); } 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. */ runstate = pmcstat_close_log(); do_print = 1; /* print PMCs at exit */ } else if (kev.ident == SIGINT) { /* Kill the child process if we started it */ if (args.pa_flags & FLAG_HAS_COMMANDLINE) pmcstat_kill_process(); runstate = pmcstat_close_log(); } else if (kev.ident == SIGWINCH) { if (ioctl(fileno(args.pa_printfile), TIOCGWINSZ, &ws) < 0) err(EX_OSERR, "ERROR: Cannot determine window size"); pmcstat_displayheight = ws.ws_row - 1; pmcstat_displaywidth = ws.ws_col - 1; } else assert(0); break; case EVFILT_TIMER: /* time duration reached, exit */ if (args.pa_flags & FLAG_HAS_DURATION) { runstate = PMCSTAT_FINISHED; break; } /* print out counting PMCs */ if ((args.pa_flags & FLAG_DO_TOP) && pmc_flush_logfile() == 0) do_read = 1; do_print = 1; break; } if (do_print && !do_read) { if ((args.pa_required & FLAG_HAS_OUTPUT_LOGFILE) == 0) { pmcstat_print_pmcs(); if (runstate == PMCSTAT_FINISHED && /* final newline */ (args.pa_flags & FLAG_DO_PRINT) == 0) (void) fprintf(args.pa_printfile, "\n"); } if (args.pa_flags & FLAG_DO_TOP) pmcstat_display_log(); do_print = 0; } } while (runstate != PMCSTAT_FINISHED); if ((args.pa_flags & FLAG_DO_TOP) && args.pa_toptty) { pmcstat_topexit(); args.pa_toptty = 0; } /* flush any pending log entries */ if (args.pa_flags & (FLAG_HAS_OUTPUT_LOGFILE | FLAG_HAS_PIPE)) pmc_close_logfile(); pmcstat_cleanup(); free(args.pa_kernel); /* check if the driver lost any samples or events */ if (check_driver_stats) { if (pmc_get_driver_stats(&ds_end) < 0) err(EX_OSERR, "ERROR: Cannot retrieve driver statistics"); if (ds_start.pm_intr_bufferfull != ds_end.pm_intr_bufferfull && args.pa_verbosity > 0) warnx("WARNING: some samples were dropped.\n" "Please consider tuning the \"kern.hwpmc.nsamples\" tunable." ); if (ds_start.pm_buffer_requests_failed != ds_end.pm_buffer_requests_failed && args.pa_verbosity > 0) warnx("WARNING: some events were discarded.\n" "Please consider tuning the \"kern.hwpmc.nbuffers\" tunable." ); } exit(EX_OK); }