#include <sys/types.h>
#include <fts.h>
#include <assert.h>
+#include <sys/mman.h>
+#include <lttng/lttng.h>
+#include <lttng/lttngtop-helper.h>
#include "lttngtoptypes.h"
#include "cputop.h"
unsigned long last_display_update = 0;
int quit = 0;
+/* LIVE */
+/* list of FDs available for being read with snapshots */
+struct mmap_stream_list mmap_list;
+GPtrArray *lttng_consumer_stream_array;
+int sessiond_metadata, consumerd_metadata;
+
enum {
OPT_NONE = 0,
OPT_HELP,
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);
}
opt_input_path = poptGetArg(pc);
- if (!opt_input_path) {
- ret = -EINVAL;
- goto end;
- }
+
end:
if (pc) {
poptFreeContext(pc);
return ret;
}
+ssize_t read_subbuffer(struct lttng_consumer_stream *kconsumerd_fd,
+ struct lttng_consumer_local_data *ctx)
+{
+ unsigned long len;
+ int err;
+ long ret = 0;
+ int infd = helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd);
+
+ if (helper_get_lttng_consumer_stream_output(kconsumerd_fd) == LTTNG_EVENT_SPLICE) {
+ /* Get the next subbuffer */
+ printf("get_next : %d\n", infd);
+ err = helper_kernctl_get_next_subbuf(infd);
+ if (err != 0) {
+ ret = errno;
+ perror("Reserving sub buffer failed (everything is normal, "
+ "it is due to concurrency)");
+ goto end;
+ }
+ /* read the whole subbuffer */
+ err = helper_kernctl_get_padded_subbuf_size(infd, &len);
+ if (err != 0) {
+ ret = errno;
+ perror("Getting sub-buffer len failed.");
+ goto end;
+ }
+ printf("len : %ld\n", len);
+
+ /* splice the subbuffer to the tracefile */
+ ret = helper_lttng_consumer_on_read_subbuffer_splice(ctx, kconsumerd_fd, len);
+ if (ret < 0) {
+ /*
+ * display the error but continue processing to try
+ * to release the subbuffer
+ */
+ fprintf(stderr,"Error splicing to tracefile\n");
+ }
+ printf("ret : %ld\n", ret);
+ printf("put_next : %d\n", infd);
+ err = helper_kernctl_put_next_subbuf(infd);
+ if (err != 0) {
+ ret = errno;
+ perror("Reserving sub buffer failed (everything is normal, "
+ "it is due to concurrency)");
+ goto end;
+ }
+// sem_post(&metadata_available);
+ }
+
+end:
+ return 0;
+}
+
+int on_update_fd(int key, uint32_t state)
+{
+ /* let the lib handle the metadata FD */
+ if (key == sessiond_metadata)
+ return 0;
+ return 1;
+}
+
+int on_recv_fd(struct lttng_consumer_stream *kconsumerd_fd)
+{
+ int ret;
+ struct mmap_stream *new_info;
+ size_t tmp_mmap_len;
+
+ printf("Receiving %d\n", helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd));
+ /* Opening the tracefile in write mode */
+ if (helper_get_lttng_consumer_stream_path_name(kconsumerd_fd) != NULL) {
+ ret = open(helper_get_lttng_consumer_stream_path_name(kconsumerd_fd),
+ O_WRONLY|O_CREAT|O_TRUNC, S_IRWXU|S_IRWXG|S_IRWXO);
+ if (ret < 0) {
+ perror("open");
+ goto end;
+ }
+ helper_set_lttng_consumer_stream_out_fd(kconsumerd_fd, ret);
+ }
+
+ if (helper_get_lttng_consumer_stream_output(kconsumerd_fd) == LTTNG_EVENT_MMAP) {
+ new_info = malloc(sizeof(struct mmap_stream));
+ new_info->fd = helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd);
+ bt_list_add(&new_info->list, &mmap_list.head);
+
+ /* get the len of the mmap region */
+ ret = helper_kernctl_get_mmap_len(helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd),
+ &tmp_mmap_len);
+ if (ret != 0) {
+ ret = errno;
+ perror("helper_kernctl_get_mmap_len");
+ goto end;
+ }
+ helper_set_lttng_consumer_stream_mmap_len(kconsumerd_fd, tmp_mmap_len);
+ printf("mmap len : %ld\n", tmp_mmap_len);
+
+ helper_set_lttng_consumer_stream_mmap_base(kconsumerd_fd,
+ mmap(NULL, helper_get_lttng_consumer_stream_mmap_len(kconsumerd_fd),
+ PROT_READ, MAP_PRIVATE, helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd), 0));
+ if (helper_get_lttng_consumer_stream_mmap_base(kconsumerd_fd) == MAP_FAILED) {
+ perror("Error mmaping");
+ ret = -1;
+ goto end;
+ }
+
+ g_ptr_array_add(lttng_consumer_stream_array, kconsumerd_fd);
+ ret = 1;
+ } else {
+ consumerd_metadata = helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd);
+ sessiond_metadata = helper_get_lttng_consumer_stream_key(kconsumerd_fd);
+ ret = 0;
+ }
+
+end:
+ return ret;
+}
+
+
+int setup_consumer(char *command_sock_path, pthread_t *threads,
+ struct lttng_consumer_local_data *ctx)
+{
+ int ret = 0;
+
+ ctx = helper_lttng_consumer_create(HELPER_LTTNG_CONSUMER_KERNEL,
+ read_subbuffer, NULL, on_recv_fd, on_update_fd);
+ if (!ctx)
+ goto end;
+
+ unlink(command_sock_path);
+ helper_lttng_consumer_set_command_sock_path(ctx, command_sock_path);
+ helper_lttng_consumer_init();
+
+ /* Create the thread to manage the receive of fd */
+ ret = pthread_create(&threads[0], NULL, helper_lttng_consumer_thread_receive_fds,
+ (void *) ctx);
+ if (ret != 0) {
+ perror("pthread_create");
+ goto end;
+ }
+ /* Create thread to manage the polling/writing of traces */
+ ret = pthread_create(&threads[1], NULL, helper_lttng_consumer_thread_poll_fds,
+ (void *) ctx);
+ if (ret != 0) {
+ perror("pthread_create");
+ goto end;
+ }
+
+end:
+ return ret;
+}
+
+int setup_live_tracing()
+{
+ struct lttng_domain dom;
+ struct lttng_channel chan;
+ char *channel_name = "mmapchan";
+ struct lttng_consumer_local_data *ctx = NULL;
+ struct lttng_event ev;
+ int ret = 0;
+ char *command_sock_path = "/tmp/consumerd_sock";
+ static pthread_t threads[2]; /* recv_fd, poll */
+ struct lttng_event_context kctxpid, kctxcomm, kctxppid, kctxtid;
+ /* list of snapshots currently not consumed */
+ GPtrArray *available_snapshots;
+
+ struct lttng_handle *handle;
+
+ BT_INIT_LIST_HEAD(&mmap_list.head);
+
+ lttng_consumer_stream_array = g_ptr_array_new();
+
+ if ((ret = setup_consumer(command_sock_path, threads, ctx)) < 0) {
+ fprintf(stderr,"error setting up consumer\n");
+ goto end;
+ }
+
+ available_snapshots = g_ptr_array_new();
+
+ /* setup the session */
+ dom.type = LTTNG_DOMAIN_KERNEL;
+
+ ret = system("rm -rf /tmp/livesession");
+
+ if ((ret = lttng_create_session("test", "/tmp/livesession")) < 0) {
+ fprintf(stderr,"error creating the session : %s\n",
+ helper_lttcomm_get_readable_code(ret));
+ goto end;
+ }
+
+ if ((handle = lttng_create_handle("test", &dom)) == NULL) {
+ fprintf(stderr,"error creating handle\n");
+ goto end;
+ }
+
+ if ((ret = lttng_register_consumer(handle, command_sock_path)) < 0) {
+ fprintf(stderr,"error registering consumer : %s\n",
+ helper_lttcomm_get_readable_code(ret));
+ goto end;
+ }
+
+ strcpy(chan.name, channel_name);
+ chan.attr.overwrite = 1;
+// chan.attr.subbuf_size = 32768;
+ chan.attr.subbuf_size = 1048576; /* 1MB */
+ chan.attr.num_subbuf = 4;
+ chan.attr.switch_timer_interval = 0;
+ chan.attr.read_timer_interval = 200;
+ chan.attr.output = LTTNG_EVENT_MMAP;
+
+ if ((ret = lttng_enable_channel(handle, &chan)) < 0) {
+ fprintf(stderr,"error creating channel : %s\n", helper_lttcomm_get_readable_code(ret));
+ goto end;
+ }
+
+ sprintf(ev.name, "sched_switch");
+ ev.type = LTTNG_EVENT_TRACEPOINT;
+
+ //if ((ret = lttng_enable_event(handle, NULL, channel_name)) < 0) {
+ if ((ret = lttng_enable_event(handle, &ev, channel_name)) < 0) {
+ fprintf(stderr,"error enabling event : %s\n", helper_lttcomm_get_readable_code(ret));
+ goto end;
+ }
+
+ kctxpid.ctx = LTTNG_EVENT_CONTEXT_PID;
+ lttng_add_context(handle, &kctxpid, NULL, NULL);
+ kctxppid.ctx = LTTNG_EVENT_CONTEXT_PPID;
+ lttng_add_context(handle, &kctxppid, NULL, NULL);
+ kctxcomm.ctx = LTTNG_EVENT_CONTEXT_PROCNAME;
+ lttng_add_context(handle, &kctxcomm, NULL, NULL);
+ kctxtid.ctx = LTTNG_EVENT_CONTEXT_TID;
+ lttng_add_context(handle, &kctxtid, NULL, NULL);
+
+ if ((ret = lttng_start_tracing("test")) < 0) {
+ fprintf(stderr,"error starting tracing : %s\n", helper_lttcomm_get_readable_code(ret));
+ goto end;
+ }
+
+ helper_kernctl_buffer_flush(consumerd_metadata);
+ sleep(10);
+
+ lttng_stop_tracing("test");
+ lttng_destroy_session("test");
+
+ /* block until metadata is ready */
+ //sem_init(&metadata_available, 0, 0);
+
+ //init_lttngtop();
+
+end:
+ return ret;
+}
+
int main(int argc, char **argv)
{
int ret;
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");
+ if (!opt_input_path) {
+ printf("live tracing enabled\n");
+ setup_live_tracing();
goto end;
- }
+ } else {
+ 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;
+ }
- pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
- pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);
+ 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);
+ iter_trace(bt_ctx);
- quit = 1;
- pthread_join(display_thread, NULL);
- pthread_join(timer_thread, NULL);
+ quit = 1;
+ pthread_join(display_thread, NULL);
+ pthread_join(timer_thread, NULL);
+ }
end:
- bt_context_put(bt_ctx);
+ if (bt_ctx)
+ bt_context_put(bt_ctx);
+
return 0;
}
projects / lttngtop.git / commitdiff
