X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=src%2Flttngtop.cpp;fp=src%2Flttngtop.cpp;h=43afe48ea21df41050ef1d44f2ba88f98066c8ce;hb=715cf83c121d2aeac7ae030d49ff5a31bd6b9ac5;hp=0000000000000000000000000000000000000000;hpb=62895477c7e60525e63e9e5117f92b34d467d0e6;p=lttngtop.git diff --git a/src/lttngtop.cpp b/src/lttngtop.cpp new file mode 100644 index 0000000..43afe48 --- /dev/null +++ b/src/lttngtop.cpp @@ -0,0 +1,717 @@ +/* + * Copyright (C) 2011-2012 Julien Desfossez + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License Version 2 as + * published by the Free Software Foundation; + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include +#include +#include +extern "C" { +#include +#include +#include +#include +} +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "lttngtoptypes.h" +#include "cputop.h" +#include "iostreamtop.h" +#include "common.h" +#include "cursesdisplay.h" + +#define DEFAULT_FILE_ARRAY_SIZE 1 + +const char *opt_input_path; + +pthread_t display_thread; +pthread_t timer_thread; + +int quit = 0; +std::string history_file; + +enum { + OPT_NONE = 0, + OPT_HELP, + OPT_LIST, + OPT_VERBOSE, + OPT_DEBUG, + OPT_NAMES, +}; + +static struct poptOption long_options[] = { + /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ + { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL }, + { NULL, 0, 0, NULL, 0, NULL, NULL }, +}; + +void *refresh_thread(void *p) +{ + while (1) { + if (quit) + return NULL; + sem_wait(&pause_sem); + sem_post(&pause_sem); + sem_post(&timer); + sleep(refresh_display/NSEC_PER_SEC); + } +} + +void *ncurses_display(void *p) +{ + sem_wait(&bootstrap); + /* + * Prevent the 1 second delay when we hit ESC + */ + ESCDELAY = 0; + init_ncurses(); + + while (1) { + sem_wait(&timer); + sem_wait(&goodtodisplay); + sem_wait(&pause_sem); + + display(); + + sem_post(&goodtoupdate); + sem_post(&pause_sem); + + if (quit) { + reset_ncurses(); + pthread_exit(0); + } + } +} + +/* + * We soft update each attribute during the execution for perfromance reasons. + * Here we write the actual intervals to disk, which are needed to query history. + */ +void create_intervals(unsigned long timestamp) +{ + StateValue::SharedPtr value; + + for (std::set::iterator i = modified_quarks.begin(); + i != modified_quarks.end(); + i++) { + value = state_system->getCurrentStateValue(*i); + /* To force the creation of an interval (which is what we want) + we need to pass a different value than the current value. + We reapply the correct value afterwards */ + if (std::tr1::dynamic_pointer_cast(value)) { + state_system->modifyAttribute(timestamp, *i, 0); + } else { + state_system->modifyAttribute(timestamp, *i, + StateValue::getNullValue()); + } + state_system->updateCurrentState(*i, value); + } + modified_quarks.clear(); +} + +/* + * hook on each event to check the timestamp and refresh the display if + * necessary + */ +enum bt_cb_ret check_timestamp(struct bt_ctf_event *call_data, + void *private_data) +{ + unsigned long timestamp; + + timestamp = bt_ctf_get_timestamp(call_data); + if (timestamp == -1ULL) + goto error; + + if (last_display_update == 0) + last_display_update = timestamp; + + if (first_display_update == 0) + first_display_update = timestamp; + + if (timestamp - last_display_update >= refresh_display) { + sem_wait(&goodtoupdate); + create_intervals(timestamp); + update_state_on_refresh(last_display_update, timestamp); + sem_post(&goodtodisplay); + sem_post(&bootstrap); + last_display_update = timestamp; + } + return BT_CB_OK; + +error: + fprintf(stderr, "check_timestamp callback error\n"); + return BT_CB_ERROR_STOP; +} + +/* + * get_perf_counter : get or create and return a perf_counter struct for + * either a process or a cpu (specified by root) + */ +Quark get_perf_counter(unsigned long timestamp, Quark root, std::string name) +{ + Quark perf_counter; + + if (state_system->attributeExists(root, "perf/" + name)) { + return state_system->getQuark(root, "perf/" + name); + } else { + perf_counter = state_system->getQuark(root, "perf/" + name); + modify_attribute(timestamp, &perf_counter, "count", 0); + modify_attribute(timestamp, &perf_counter, "visible", 1); + add_in_sequence(timestamp, perf_counter, + state_system->getQuark(root, "perf")); + return perf_counter; + } +} + +void update_perf_value(unsigned long timestamp, Quark proc, Quark cpu, + std::string name, int value) +{ + Quark cpu_perf, process_perf; + int count; + + cpu_perf = get_perf_counter(timestamp, cpu, name); + get_current_attribute_value_int(&cpu_perf, "count", count); + if (count < value) { + process_perf = get_perf_counter(timestamp, proc, name); + increase_attribute( + timestamp, &process_perf, "count", value - count); + modify_attribute(timestamp, &cpu_perf, "count", value); + } +} + +void extract_perf_counter_scope(unsigned long timestamp, + const struct bt_ctf_event *event, + const struct definition *scope, + Quark proc, Quark cpu) +{ + struct definition const * const *list = NULL; + const struct definition *field; + unsigned int count; + int ret; + std::string key; + Quark perf_quark; + + if (!scope) + goto end; + + ret = bt_ctf_get_field_list(event, scope, &list, &count); + if (ret < 0) + goto end; + + if (count == 0) + goto end; + + if (get_current_attribute_value_quark( + NULL, "perf", perf_quark)) { + do { + get_current_attribute_value_string( + &perf_quark, "key", key); + field = bt_ctf_get_field(event, scope, key.c_str()); + if (field) { + int value = bt_ctf_get_uint64(field); + if (bt_ctf_field_get_error()) + continue; + update_perf_value( + timestamp, proc, cpu, key, value); + } + } while (get_current_attribute_value_quark( + &perf_quark, "next", perf_quark)); + } + + +end: + return; +} + +void update_perf_counter(unsigned long timestamp, Quark proc, + const struct bt_ctf_event *event) +{ + Quark cpu; + const struct definition *scope; + + cpu = get_cpu(get_cpu_id(event), timestamp); + + scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT); + extract_perf_counter_scope(timestamp, event, scope, proc, cpu); + + scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT); + extract_perf_counter_scope(timestamp, event, scope, proc, cpu); + + scope = bt_ctf_get_top_level_scope(event, BT_EVENT_CONTEXT); + extract_perf_counter_scope(timestamp, event, scope, proc, cpu); +} + +enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data, + void *private_data) +{ int pid, tid, ppid; + char *comm; + Quark parent, child; + unsigned long timestamp; + + timestamp = bt_ctf_get_timestamp(call_data); + if (timestamp == -1ULL) + goto error; + + pid = get_context_pid(call_data); + if ((unsigned long)pid == -1ULL) { + goto error; + } + tid = get_context_tid(call_data); + if ((unsigned long)tid == -1ULL) { + goto error; + } + ppid = get_context_ppid(call_data); + if ((unsigned long)ppid == -1ULL) { + goto error; + } + comm = get_context_comm(call_data); + if (!comm) { + goto error; + } + + /* find or create the current process */ + if (!find_process_tid(tid, child)) + child = add_proc(tid, comm, timestamp); + update_proc(timestamp, child, pid, tid, ppid, comm); + + if (pid != tid) { + /* find or create the parent */ + if (!find_process_tid(pid, parent)) { + parent = add_proc(pid, comm, timestamp); + modify_attribute(timestamp, &parent, "pid", pid); + } + + /* attach the parent to the current process */ + modify_attribute(timestamp, &parent, "threadparent", parent); + add_thread(timestamp, parent, child); + } + + update_perf_counter(timestamp, child, call_data); + + return BT_CB_OK; + +error: + return BT_CB_ERROR_STOP; +} + +void init_lttngtop() +{ + sem_init(&goodtodisplay, 0, 0); + sem_init(&goodtoupdate, 0, 1); + sem_init(&timer, 0, 1); + sem_init(&bootstrap, 0, 0); + sem_init(&pause_sem, 0, 1); + sem_init(&end_trace_sem, 0, 0); + + // TODO: real file name + std::stringstream ss; + ss << "history" << time(NULL) << ".hst"; + history_file = ss.str(); + IntervalHistoryProvider *ihp = g_new(IntervalHistoryProvider, 1); + new (ihp) IntervalHistoryProvider(history_file); + state_system = g_new(StateSystem, 1); + new (state_system) StateSystem(ihp); + + /* Create global attributes */ + state_system->updateCurrentState( + state_system->getQuark("nbproc"), 0); + state_system->updateCurrentState( + state_system->getQuark("nbnewproc"), 0); + state_system->updateCurrentState( + state_system->getQuark("nbdeadproc"), 0); + state_system->updateCurrentState( + state_system->getQuark("nbthreads"), 0); + state_system->updateCurrentState( + state_system->getQuark("nbnewthreads"), 0); + state_system->updateCurrentState( + state_system->getQuark("nbdeadthreads"), 0); + state_system->updateCurrentState( + state_system->getQuark("nbfiles"), 0); + state_system->updateCurrentState( + state_system->getQuark("nbnewfiles"), 0); + state_system->updateCurrentState( + state_system->getQuark("nbdeadfiles"), 0); +} + +void usage(FILE *fp) +{ + fprintf(fp, "LTTngTop %s\n\n", VERSION); + fprintf(fp, "Usage : lttngtop /path/to/trace\n"); +} + +/* + * Return 0 if caller should continue, < 0 if caller should return + * error, > 0 if caller should exit without reporting error. + */ +static int parse_options(int argc, char **argv) +{ + poptContext pc; + int opt, ret = 0; + + if (argc == 1) { + usage(stdout); + return 1; /* exit cleanly */ + } + + pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0); + poptReadDefaultConfig(pc, 0); + + while ((opt = poptGetNextOpt(pc)) != -1) { + switch (opt) { + case OPT_HELP: + usage(stdout); + ret = 1; /* exit cleanly */ + goto end; + default: + ret = -EINVAL; + goto end; + } + } + + opt_input_path = poptGetArg(pc); + if (!opt_input_path) { + ret = -EINVAL; + goto end; + } +end: + if (pc) { + poptFreeContext(pc); + } + return ret; +} + +void iter_trace(struct bt_context *bt_ctx) +{ + struct bt_ctf_iter *iter; + struct bt_iter_pos begin_pos; + const struct bt_ctf_event *event; + int ret = 0; + + begin_pos.type = bt_iter_pos::BT_SEEK_BEGIN; + iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL); + + /* at each event check if we need to refresh */ + bt_ctf_iter_add_callback(iter, 0, NULL, 0, + check_timestamp, + NULL, NULL, NULL); + /* at each event, verify the status of the process table */ + bt_ctf_iter_add_callback(iter, 0, NULL, 0, + fix_process_table, + NULL, NULL, NULL); + /* to handle the scheduling events */ + bt_ctf_iter_add_callback(iter, + g_quark_from_static_string("sched_switch"), + NULL, 0, handle_sched_switch, NULL, NULL, NULL); + /* to clean up the process table */ + bt_ctf_iter_add_callback(iter, + g_quark_from_static_string("sched_process_free"), + NULL, 0, handle_sched_process_free, NULL, NULL, NULL); + /* to get all the process from the statedumps */ + bt_ctf_iter_add_callback(iter, + g_quark_from_static_string( + "lttng_statedump_process_state"), + NULL, 0, handle_statedump_process_state, + NULL, NULL, NULL); + + /* for IO top */ + bt_ctf_iter_add_callback(iter, + g_quark_from_static_string("exit_syscall"), + NULL, 0, handle_exit_syscall, NULL, NULL, NULL); + bt_ctf_iter_add_callback(iter, + g_quark_from_static_string("sys_write"), + NULL, 0, handle_sys_write, NULL, NULL, NULL); + bt_ctf_iter_add_callback(iter, + g_quark_from_static_string("sys_read"), + NULL, 0, handle_sys_read, NULL, NULL, NULL); + bt_ctf_iter_add_callback(iter, + g_quark_from_static_string("sys_open"), + NULL, 0, handle_sys_open, NULL, NULL, NULL); + bt_ctf_iter_add_callback(iter, + g_quark_from_static_string("sys_close"), + NULL, 0, handle_sys_close, NULL, NULL, NULL); + bt_ctf_iter_add_callback(iter, + g_quark_from_static_string( + "lttng_statedump_file_descriptor"), + NULL, 0, handle_statedump_file_descriptor, + NULL, NULL, NULL); + + while ((event = bt_ctf_iter_read_event(iter)) != NULL) { + ret = bt_iter_next(bt_ctf_get_iter(iter)); + if (ret < 0) + goto end_iter; + } + + /* block until quit, we reached the end of the trace */ + sem_wait(&end_trace_sem); + +end_iter: + bt_ctf_iter_destroy(iter); +} + +/* + * bt_context_add_traces_recursive: Open a trace recursively + * (copied from BSD code in converter/babeltrace.c) + * + * Find each trace present in the subdirectory starting from the given + * path, and add them to the context. The packet_seek parameter can be + * NULL: this specify to use the default format packet_seek. + * + * Return: 0 on success, nonzero on failure. + * Unable to open toplevel: failure. + * Unable to open some subdirectory or file: warn and continue; + */ +int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path, + const char *format_str, + void (*packet_seek)(struct stream_pos *pos, + size_t offset, int whence)) +{ + FTS *tree; + FTSENT *node; + GArray *trace_ids; + char lpath[PATH_MAX]; + char * const paths[2] = { lpath, NULL }; + int ret = -1; + + /* + * Need to copy path, because fts_open can change it. + * It is the pointer array, not the strings, that are constant. + */ + strncpy(lpath, path, PATH_MAX); + lpath[PATH_MAX - 1] = '\0'; + + tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0); + if (tree == NULL) { + fprintf(stderr, "[error] [Context] Cannot traverse \"%s\" for reading.\n", + path); + return -EINVAL; + } + + trace_ids = g_array_new(FALSE, TRUE, sizeof(int)); + + while ((node = fts_read(tree))) { + int dirfd, metafd; + + if (!(node->fts_info & FTS_D)) + continue; + + dirfd = open(node->fts_accpath, 0); + if (dirfd < 0) { + fprintf(stderr, "[error] [Context] Unable to open trace " + "directory file descriptor.\n"); + ret = dirfd; + goto error; + } + metafd = openat(dirfd, "metadata", O_RDONLY); + if (metafd < 0) { + close(dirfd); + ret = -1; + continue; + } else { + int trace_id; + + ret = close(metafd); + if (ret < 0) { + perror("close"); + goto error; + } + ret = close(dirfd); + if (ret < 0) { + perror("close"); + goto error; + } + + trace_id = bt_context_add_trace(ctx, + node->fts_accpath, format_str, + packet_seek, NULL, NULL); + if (trace_id < 0) { + fprintf(stderr, "[warning] [Context] opening trace \"%s\" from %s " + "for reading.\n", node->fts_accpath, path); + /* Allow to skip erroneous traces. */ + continue; + } + g_array_append_val(trace_ids, trace_id); + } + } + + g_array_free(trace_ids, TRUE); + return ret; + +error: + return ret; +} + +static int check_field_requirements(const struct bt_ctf_field_decl *const * field_list, + int field_cnt, int *tid_check, int *pid_check, + int *procname_check, int *ppid_check) +{ + int j; + const char *name; + Quark perf; + Quark perf_root = state_system->getQuark("perf"); + static bool first_perf_counter = true; + + for (j = 0; j < field_cnt; j++) { + name = bt_ctf_get_decl_field_name(field_list[j]); + if (*tid_check == 0) { + if (strncmp(name, "tid", 3) == 0) + (*tid_check)++; + } + if (*pid_check == 0) { + if (strncmp(name, "tid", 3) == 0) + (*pid_check)++; + } + if (*ppid_check == 0) { + if (strncmp(name, "ppid", 4) == 0) + (*ppid_check)++; + } + if (*procname_check == 0) { + if (strncmp(name, "procname", 8) == 0) + (*procname_check)++; + } + if (strncmp(name, "perf_", 5) == 0) { + if (!state_system->attributeExists( + perf_root, name+5)) { + perf = state_system->getQuark(perf_root, name+5); + /* by default, sort on the first perf context */ + if (first_perf_counter) { + modify_attribute(0, &perf, "sort", 1); + first_perf_counter = false; + } + modify_attribute(0, &perf, "visible", 1); + add_in_sequence(0, perf, perf_root); + } + } + } + + if (*tid_check == 1 && *pid_check == 1 && *ppid_check == 1 && + *procname_check == 1) + return 0; + + return -1; +} + +/* + * check_requirements: check if the required context informations are available + * + * If each mandatory context information is available for at least in one + * event, return 0 otherwise return -1. + */ +int check_requirements(struct bt_context *ctx) +{ + unsigned int i, evt_cnt, field_cnt; + struct bt_ctf_event_decl *const * evt_list; + const struct bt_ctf_field_decl *const * field_list; + int tid_check = 0; + int pid_check = 0; + int procname_check = 0; + int ppid_check = 0; + int ret = 0; + + bt_ctf_get_event_decl_list(0, ctx, &evt_list, &evt_cnt); + for (i = 0; i < evt_cnt; i++) { + bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_EVENT_CONTEXT, + &field_list, &field_cnt); + ret = check_field_requirements(field_list, field_cnt, + &tid_check, &pid_check, &procname_check, + &ppid_check); + + bt_ctf_get_decl_fields(evt_list[i], BT_EVENT_CONTEXT, + &field_list, &field_cnt); + ret = check_field_requirements(field_list, field_cnt, + &tid_check, &pid_check, &procname_check, + &ppid_check); + + bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_PACKET_CONTEXT, + &field_list, &field_cnt); + ret = check_field_requirements(field_list, field_cnt, + &tid_check, &pid_check, &procname_check, + &ppid_check); + } + + if (tid_check == 0) { + ret = -1; + fprintf(stderr, "[error] missing tid context information\n"); + } + if (pid_check == 0) { + ret = -1; + fprintf(stderr, "[error] missing pid context information\n"); + } + if (ppid_check == 0) { + ret = -1; + fprintf(stderr, "[error] missing ppid context information\n"); + } + if (procname_check == 0) { + ret = -1; + fprintf(stderr, "[error] missing procname context information\n"); + } + + return ret; +} + +int main(int argc, char **argv) +{ + int ret; + struct bt_context *bt_ctx = NULL; + + ret = parse_options(argc, argv); + if (ret < 0) { + fprintf(stdout, "Error parsing options.\n\n"); + usage(stdout); + exit(EXIT_FAILURE); + } else if (ret > 0) { + exit(EXIT_SUCCESS); + } + + init_lttngtop(); + + bt_ctx = bt_context_create(); + ret = bt_context_add_traces_recursive(bt_ctx, opt_input_path, "ctf", NULL); + if (ret < 0) { + fprintf(stderr, "[error] Opening the trace\n"); + goto end; + } + + ret = check_requirements(bt_ctx); + if (ret < 0) { + fprintf(stderr, "[error] some mandatory contexts were missing, exiting.\n"); + goto end; + } + + pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL); + pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL); + + iter_trace(bt_ctx); + + quit = 1; + pthread_join(display_thread, NULL); + pthread_join(timer_thread, NULL); + +end: + bt_context_put(bt_ctx); + return 0; +}