diff options
Diffstat (limited to 'collectors/ebpf.plugin/ebpf_swap.c')
| -rw-r--r-- | collectors/ebpf.plugin/ebpf_swap.c | 1030 |
1 files changed, 0 insertions, 1030 deletions
diff --git a/collectors/ebpf.plugin/ebpf_swap.c b/collectors/ebpf.plugin/ebpf_swap.c deleted file mode 100644 index fb007f92..00000000 --- a/collectors/ebpf.plugin/ebpf_swap.c +++ /dev/null @@ -1,1030 +0,0 @@ -// SPDX-License-Identifier: GPL-3.0-or-later - -#include "ebpf.h" -#include "ebpf_swap.h" - -static char *swap_dimension_name[NETDATA_SWAP_END] = { "read", "write" }; -static netdata_syscall_stat_t swap_aggregated_data[NETDATA_SWAP_END]; -static netdata_publish_syscall_t swap_publish_aggregated[NETDATA_SWAP_END]; - -static netdata_idx_t swap_hash_values[NETDATA_SWAP_END]; -static netdata_idx_t *swap_values = NULL; - -netdata_publish_swap_t *swap_vector = NULL; - -struct config swap_config = { .first_section = NULL, - .last_section = NULL, - .mutex = NETDATA_MUTEX_INITIALIZER, - .index = { .avl_tree = { .root = NULL, .compar = appconfig_section_compare }, - .rwlock = AVL_LOCK_INITIALIZER } }; - -static ebpf_local_maps_t swap_maps[] = {{.name = "tbl_pid_swap", .internal_input = ND_EBPF_DEFAULT_PID_SIZE, - .user_input = 0, - .type = NETDATA_EBPF_MAP_RESIZABLE | NETDATA_EBPF_MAP_PID, - .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, -#ifdef LIBBPF_MAJOR_VERSION - .map_type = BPF_MAP_TYPE_PERCPU_HASH -#endif - }, - {.name = "swap_ctrl", .internal_input = NETDATA_CONTROLLER_END, - .user_input = 0, - .type = NETDATA_EBPF_MAP_CONTROLLER, - .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, -#ifdef LIBBPF_MAJOR_VERSION - .map_type = BPF_MAP_TYPE_PERCPU_ARRAY -#endif - }, - {.name = "tbl_swap", .internal_input = NETDATA_SWAP_END, - .user_input = 0, - .type = NETDATA_EBPF_MAP_STATIC, - .map_fd = ND_EBPF_MAP_FD_NOT_INITIALIZED, -#ifdef LIBBPF_MAJOR_VERSION - .map_type = BPF_MAP_TYPE_PERCPU_ARRAY -#endif - }, - {.name = NULL, .internal_input = 0, .user_input = 0, -#ifdef LIBBPF_MAJOR_VERSION - .map_type = BPF_MAP_TYPE_PERCPU_ARRAY -#endif - }}; - -netdata_ebpf_targets_t swap_targets[] = { {.name = "swap_readpage", .mode = EBPF_LOAD_TRAMPOLINE}, - {.name = "swap_writepage", .mode = EBPF_LOAD_TRAMPOLINE}, - {.name = NULL, .mode = EBPF_LOAD_TRAMPOLINE}}; - -#ifdef LIBBPF_MAJOR_VERSION -/** - * Disable probe - * - * Disable all probes to use exclusively another method. - * - * @param obj is the main structure for bpf objects - */ -static void ebpf_swap_disable_probe(struct swap_bpf *obj) -{ - bpf_program__set_autoload(obj->progs.netdata_swap_readpage_probe, false); - bpf_program__set_autoload(obj->progs.netdata_swap_writepage_probe, false); -} - -/* - * Disable trampoline - * - * Disable all trampoline to use exclusively another method. - * - * @param obj is the main structure for bpf objects. - */ -static void ebpf_swap_disable_trampoline(struct swap_bpf *obj) -{ - bpf_program__set_autoload(obj->progs.netdata_swap_readpage_fentry, false); - bpf_program__set_autoload(obj->progs.netdata_swap_writepage_fentry, false); - bpf_program__set_autoload(obj->progs.netdata_release_task_fentry, false); -} - -/** - * Set trampoline target - * - * Set the targets we will monitor. - * - * @param obj is the main structure for bpf objects. - */ -static void ebpf_swap_set_trampoline_target(struct swap_bpf *obj) -{ - bpf_program__set_attach_target(obj->progs.netdata_swap_readpage_fentry, 0, - swap_targets[NETDATA_KEY_SWAP_READPAGE_CALL].name); - - bpf_program__set_attach_target(obj->progs.netdata_swap_writepage_fentry, 0, - swap_targets[NETDATA_KEY_SWAP_WRITEPAGE_CALL].name); - - bpf_program__set_attach_target(obj->progs.netdata_release_task_fentry, 0, - EBPF_COMMON_FNCT_CLEAN_UP); -} - -/** - * Mount Attach Probe - * - * Attach probes to target - * - * @param obj is the main structure for bpf objects. - * - * @return It returns 0 on success and -1 otherwise. - */ -static int ebpf_swap_attach_kprobe(struct swap_bpf *obj) -{ - obj->links.netdata_swap_readpage_probe = bpf_program__attach_kprobe(obj->progs.netdata_swap_readpage_probe, - false, - swap_targets[NETDATA_KEY_SWAP_READPAGE_CALL].name); - int ret = libbpf_get_error(obj->links.netdata_swap_readpage_probe); - if (ret) - return -1; - - obj->links.netdata_swap_writepage_probe = bpf_program__attach_kprobe(obj->progs.netdata_swap_writepage_probe, - false, - swap_targets[NETDATA_KEY_SWAP_WRITEPAGE_CALL].name); - ret = libbpf_get_error(obj->links.netdata_swap_writepage_probe); - if (ret) - return -1; - - return 0; -} - -/** - * Set hash tables - * - * Set the values for maps according the value given by kernel. - * - * @param obj is the main structure for bpf objects. - */ -static void ebpf_swap_set_hash_tables(struct swap_bpf *obj) -{ - swap_maps[NETDATA_PID_SWAP_TABLE].map_fd = bpf_map__fd(obj->maps.tbl_pid_swap); - swap_maps[NETDATA_SWAP_CONTROLLER].map_fd = bpf_map__fd(obj->maps.swap_ctrl); - swap_maps[NETDATA_SWAP_GLOBAL_TABLE].map_fd = bpf_map__fd(obj->maps.tbl_swap); -} - -/** - * Adjust Map - * - * Resize maps according input from users. - * - * @param obj is the main structure for bpf objects. - * @param em structure with configuration - */ -static void ebpf_swap_adjust_map(struct swap_bpf *obj, ebpf_module_t *em) -{ - ebpf_update_map_size(obj->maps.tbl_pid_swap, &swap_maps[NETDATA_PID_SWAP_TABLE], - em, bpf_map__name(obj->maps.tbl_pid_swap)); - - ebpf_update_map_type(obj->maps.tbl_pid_swap, &swap_maps[NETDATA_PID_SWAP_TABLE]); - ebpf_update_map_type(obj->maps.tbl_swap, &swap_maps[NETDATA_SWAP_GLOBAL_TABLE]); - ebpf_update_map_type(obj->maps.swap_ctrl, &swap_maps[NETDATA_SWAP_CONTROLLER]); -} - -/** - * Disable Release Task - * - * Disable release task when apps is not enabled. - * - * @param obj is the main structure for bpf objects. - */ -static void ebpf_swap_disable_release_task(struct swap_bpf *obj) -{ - bpf_program__set_autoload(obj->progs.netdata_release_task_fentry, false); -} - -/** - * Load and attach - * - * Load and attach the eBPF code in kernel. - * - * @param obj is the main structure for bpf objects. - * @param em structure with configuration - * - * @return it returns 0 on success and -1 otherwise - */ -static inline int ebpf_swap_load_and_attach(struct swap_bpf *obj, ebpf_module_t *em) -{ - netdata_ebpf_targets_t *mt = em->targets; - netdata_ebpf_program_loaded_t test = mt[NETDATA_KEY_SWAP_READPAGE_CALL].mode; - - if (test == EBPF_LOAD_TRAMPOLINE) { - ebpf_swap_disable_probe(obj); - - ebpf_swap_set_trampoline_target(obj); - } else { - ebpf_swap_disable_trampoline(obj); - } - - ebpf_swap_adjust_map(obj, em); - - if (!em->apps_charts && !em->cgroup_charts) - ebpf_swap_disable_release_task(obj); - - int ret = swap_bpf__load(obj); - if (ret) { - return ret; - } - - ret = (test == EBPF_LOAD_TRAMPOLINE) ? swap_bpf__attach(obj) : ebpf_swap_attach_kprobe(obj); - if (!ret) { - ebpf_swap_set_hash_tables(obj); - - ebpf_update_controller(swap_maps[NETDATA_SWAP_CONTROLLER].map_fd, em); - } - - return ret; -} -#endif - -/***************************************************************** - * - * FUNCTIONS TO CLOSE THE THREAD - * - *****************************************************************/ - -static void ebpf_obsolete_specific_swap_charts(char *type, int update_every); - -/** - * Obsolete services - * - * Obsolete all service charts created - * - * @param em a pointer to `struct ebpf_module` - */ -static void ebpf_obsolete_swap_services(ebpf_module_t *em) -{ - ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY, - NETDATA_MEM_SWAP_READ_CHART, - "", - "Calls to function swap_readpage.", - EBPF_COMMON_DIMENSION_CALL, - NETDATA_SYSTEM_CGROUP_SWAP_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, - NETDATA_CGROUP_SWAP_READ_CONTEXT, - NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5100, - em->update_every); - - ebpf_write_chart_obsolete(NETDATA_SERVICE_FAMILY, - NETDATA_MEM_SWAP_WRITE_CHART, - "", - "Calls to function swap_writepage.", - EBPF_COMMON_DIMENSION_CALL, - NETDATA_SYSTEM_CGROUP_SWAP_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, - NETDATA_CGROUP_SWAP_WRITE_CONTEXT, - NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5101, - em->update_every); -} - -/** - * Obsolete cgroup chart - * - * Send obsolete for all charts created before to close. - * - * @param em a pointer to `struct ebpf_module` - */ -static inline void ebpf_obsolete_swap_cgroup_charts(ebpf_module_t *em) { - pthread_mutex_lock(&mutex_cgroup_shm); - - ebpf_obsolete_swap_services(em); - - ebpf_cgroup_target_t *ect; - for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { - if (ect->systemd) - continue; - - ebpf_obsolete_specific_swap_charts(ect->name, em->update_every); - } - pthread_mutex_unlock(&mutex_cgroup_shm); -} - -/** - * Obsolette apps charts - * - * Obsolete apps charts. - * - * @param em a pointer to the structure with the default values. - */ -void ebpf_obsolete_swap_apps_charts(struct ebpf_module *em) -{ - struct ebpf_target *w; - int update_every = em->update_every; - for (w = apps_groups_root_target; w; w = w->next) { - if (unlikely(!(w->charts_created & (1<<EBPF_MODULE_SWAP_IDX)))) - continue; - - ebpf_write_chart_obsolete(NETDATA_APP_FAMILY, - w->clean_name, - "_ebpf_call_swap_readpage", - "Calls to function swap_readpage.", - EBPF_COMMON_DIMENSION_CALL, - NETDATA_EBPF_MEMORY_GROUP, - NETDATA_EBPF_CHART_TYPE_STACKED, - "app.ebpf_call_swap_readpage", - 20070, - update_every); - - ebpf_write_chart_obsolete(NETDATA_APP_FAMILY, - w->clean_name, - "_ebpf_call_swap_writepage", - "Calls to function swap_writepage.", - EBPF_COMMON_DIMENSION_CALL, - NETDATA_EBPF_MEMORY_GROUP, - NETDATA_EBPF_CHART_TYPE_STACKED, - "app.ebpf_call_swap_writepage", - 20071, - update_every); - w->charts_created &= ~(1<<EBPF_MODULE_SWAP_IDX); - } -} - -/** - * Obsolete global - * - * Obsolete global charts created by thread. - * - * @param em a pointer to `struct ebpf_module` - */ -static void ebpf_obsolete_swap_global(ebpf_module_t *em) -{ - ebpf_write_chart_obsolete(NETDATA_EBPF_MEMORY_GROUP, - NETDATA_MEM_SWAP_CHART, - "", - "Calls to access swap memory", - EBPF_COMMON_DIMENSION_CALL, NETDATA_SYSTEM_SWAP_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, - NULL, - NETDATA_CHART_PRIO_MEM_SWAP_CALLS, - em->update_every); -} - -/** - * Swap exit - * - * Cancel thread and exit. - * - * @param ptr thread data. - */ -static void ebpf_swap_exit(void *ptr) -{ - ebpf_module_t *em = (ebpf_module_t *)ptr; - - if (em->enabled == NETDATA_THREAD_EBPF_FUNCTION_RUNNING) { - pthread_mutex_lock(&lock); - if (em->cgroup_charts) { - ebpf_obsolete_swap_cgroup_charts(em); - fflush(stdout); - } - - if (em->apps_charts & NETDATA_EBPF_APPS_FLAG_CHART_CREATED) { - ebpf_obsolete_swap_apps_charts(em); - } - - ebpf_obsolete_swap_global(em); - - fflush(stdout); - pthread_mutex_unlock(&lock); - } - - ebpf_update_kernel_memory_with_vector(&plugin_statistics, em->maps, EBPF_ACTION_STAT_REMOVE); - -#ifdef LIBBPF_MAJOR_VERSION - if (bpf_obj) { - swap_bpf__destroy(bpf_obj); - bpf_obj = NULL; - } -#endif - if (em->objects) { - ebpf_unload_legacy_code(em->objects, em->probe_links); - em->objects = NULL; - em->probe_links = NULL; - } - - pthread_mutex_lock(&ebpf_exit_cleanup); - em->enabled = NETDATA_THREAD_EBPF_STOPPED; - ebpf_update_stats(&plugin_statistics, em); - pthread_mutex_unlock(&ebpf_exit_cleanup); -} - -/***************************************************************** - * - * COLLECTOR THREAD - * - *****************************************************************/ - -/** - * Apps Accumulator - * - * Sum all values read from kernel and store in the first address. - * - * @param out the vector with read values. - * @param maps_per_core do I need to read all cores? - */ -static void swap_apps_accumulator(netdata_publish_swap_t *out, int maps_per_core) -{ - int i, end = (maps_per_core) ? ebpf_nprocs : 1; - netdata_publish_swap_t *total = &out[0]; - for (i = 1; i < end; i++) { - netdata_publish_swap_t *w = &out[i]; - total->write += w->write; - total->read += w->read; - } -} - -/** - * Fill PID - * - * Fill PID structures - * - * @param current_pid pid that we are collecting data - * @param out values read from hash tables; - */ -static void swap_fill_pid(uint32_t current_pid, netdata_publish_swap_t *publish) -{ - netdata_publish_swap_t *curr = swap_pid[current_pid]; - if (!curr) { - curr = callocz(1, sizeof(netdata_publish_swap_t)); - swap_pid[current_pid] = curr; - } - - memcpy(curr, publish, sizeof(netdata_publish_swap_t)); -} - -/** - * Update cgroup - * - * Update cgroup data based in - * - * @param maps_per_core do I need to read all cores? - */ -static void ebpf_update_swap_cgroup(int maps_per_core) -{ - ebpf_cgroup_target_t *ect ; - netdata_publish_swap_t *cv = swap_vector; - int fd = swap_maps[NETDATA_PID_SWAP_TABLE].map_fd; - size_t length = sizeof(netdata_publish_swap_t); - if (maps_per_core) - length *= ebpf_nprocs; - pthread_mutex_lock(&mutex_cgroup_shm); - for (ect = ebpf_cgroup_pids; ect; ect = ect->next) { - struct pid_on_target2 *pids; - for (pids = ect->pids; pids; pids = pids->next) { - int pid = pids->pid; - netdata_publish_swap_t *out = &pids->swap; - if (likely(swap_pid) && swap_pid[pid]) { - netdata_publish_swap_t *in = swap_pid[pid]; - - memcpy(out, in, sizeof(netdata_publish_swap_t)); - } else { - memset(cv, 0, length); - if (!bpf_map_lookup_elem(fd, &pid, cv)) { - swap_apps_accumulator(cv, maps_per_core); - - memcpy(out, cv, sizeof(netdata_publish_swap_t)); - - // We are cleaning to avoid passing data read from one process to other. - memset(cv, 0, length); - } - } - } - } - pthread_mutex_unlock(&mutex_cgroup_shm); -} - -/** - * Read APPS table - * - * Read the apps table and store data inside the structure. - * - * @param maps_per_core do I need to read all cores? - */ -static void read_swap_apps_table(int maps_per_core) -{ - netdata_publish_swap_t *cv = swap_vector; - uint32_t key; - struct ebpf_pid_stat *pids = ebpf_root_of_pids; - int fd = swap_maps[NETDATA_PID_SWAP_TABLE].map_fd; - size_t length = sizeof(netdata_publish_swap_t); - if (maps_per_core) - length *= ebpf_nprocs; - while (pids) { - key = pids->pid; - - if (bpf_map_lookup_elem(fd, &key, cv)) { - pids = pids->next; - continue; - } - - swap_apps_accumulator(cv, maps_per_core); - - swap_fill_pid(key, cv); - - // We are cleaning to avoid passing data read from one process to other. - memset(cv, 0, length); - - pids = pids->next; - } -} - -/** -* Send global -* -* Send global charts to Netdata -*/ -static void swap_send_global() -{ - write_io_chart(NETDATA_MEM_SWAP_CHART, NETDATA_EBPF_MEMORY_GROUP, - swap_publish_aggregated[NETDATA_KEY_SWAP_WRITEPAGE_CALL].dimension, - (long long) swap_hash_values[NETDATA_KEY_SWAP_WRITEPAGE_CALL], - swap_publish_aggregated[NETDATA_KEY_SWAP_READPAGE_CALL].dimension, - (long long) swap_hash_values[NETDATA_KEY_SWAP_READPAGE_CALL]); -} - -/** - * Read global counter - * - * Read the table with number of calls to all functions - * - * @param stats vector used to read data from control table. - * @param maps_per_core do I need to read all cores? - */ -static void ebpf_swap_read_global_table(netdata_idx_t *stats, int maps_per_core) -{ - ebpf_read_global_table_stats(swap_hash_values, - swap_values, - swap_maps[NETDATA_SWAP_GLOBAL_TABLE].map_fd, - maps_per_core, - NETDATA_KEY_SWAP_READPAGE_CALL, - NETDATA_SWAP_END); - - ebpf_read_global_table_stats(stats, - swap_values, - swap_maps[NETDATA_SWAP_CONTROLLER].map_fd, - maps_per_core, - NETDATA_CONTROLLER_PID_TABLE_ADD, - NETDATA_CONTROLLER_END); -} - -/** - * Sum PIDs - * - * Sum values for all targets. - * - * @param swap - * @param root - */ -static void ebpf_swap_sum_pids(netdata_publish_swap_t *swap, struct ebpf_pid_on_target *root) -{ - uint64_t local_read = 0; - uint64_t local_write = 0; - - while (root) { - int32_t pid = root->pid; - netdata_publish_swap_t *w = swap_pid[pid]; - if (w) { - local_write += w->write; - local_read += w->read; - } - root = root->next; - } - - // These conditions were added, because we are using incremental algorithm - swap->write = (local_write >= swap->write) ? local_write : swap->write; - swap->read = (local_read >= swap->read) ? local_read : swap->read; -} - -/** - * Send data to Netdata calling auxiliary functions. - * - * @param root the target list. -*/ -void ebpf_swap_send_apps_data(struct ebpf_target *root) -{ - struct ebpf_target *w; - for (w = root; w; w = w->next) { - if (unlikely(!(w->charts_created & (1<<EBPF_MODULE_SWAP_IDX)))) - continue; - - ebpf_swap_sum_pids(&w->swap, w->root_pid); - - ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_call_swap_readpage"); - write_chart_dimension("calls", (long long) w->swap.read); - ebpf_write_end_chart(); - - ebpf_write_begin_chart(NETDATA_APP_FAMILY, w->clean_name, "_ebpf_call_swap_writepage"); - write_chart_dimension("calls", (long long) w->swap.write); - ebpf_write_end_chart(); - } -} - -/** - * Sum PIDs - * - * Sum values for all targets. - * - * @param swap - * @param root - */ -static void ebpf_swap_sum_cgroup_pids(netdata_publish_swap_t *swap, struct pid_on_target2 *pids) -{ - uint64_t local_read = 0; - uint64_t local_write = 0; - - while (pids) { - netdata_publish_swap_t *w = &pids->swap; - local_write += w->write; - local_read += w->read; - - pids = pids->next; - } - - // These conditions were added, because we are using incremental algorithm - swap->write = (local_write >= swap->write) ? local_write : swap->write; - swap->read = (local_read >= swap->read) ? local_read : swap->read; -} - -/** - * Send Systemd charts - * - * Send collected data to Netdata. - */ -static void ebpf_send_systemd_swap_charts() -{ - ebpf_cgroup_target_t *ect; - ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_MEM_SWAP_READ_CHART, ""); - for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { - if (unlikely(ect->systemd) && unlikely(ect->updated)) { - write_chart_dimension(ect->name, (long long) ect->publish_systemd_swap.read); - } - } - ebpf_write_end_chart(); - - ebpf_write_begin_chart(NETDATA_SERVICE_FAMILY, NETDATA_MEM_SWAP_WRITE_CHART, ""); - for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { - if (unlikely(ect->systemd) && unlikely(ect->updated)) { - write_chart_dimension(ect->name, (long long) ect->publish_systemd_swap.write); - } - } - ebpf_write_end_chart(); -} - -/** - * Create specific swap charts - * - * Create charts for cgroup/application. - * - * @param type the chart type. - * @param update_every value to overwrite the update frequency set by the server. - */ -static void ebpf_create_specific_swap_charts(char *type, int update_every) -{ - ebpf_create_chart(type, NETDATA_MEM_SWAP_READ_CHART, - "Calls to function swap_readpage.", - EBPF_COMMON_DIMENSION_CALL, NETDATA_SYSTEM_CGROUP_SWAP_SUBMENU, - NETDATA_CGROUP_SWAP_READ_CONTEXT, NETDATA_EBPF_CHART_TYPE_LINE, - NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5100, - ebpf_create_global_dimension, - swap_publish_aggregated, 1, update_every, NETDATA_EBPF_MODULE_NAME_SWAP); - - ebpf_create_chart(type, NETDATA_MEM_SWAP_WRITE_CHART, - "Calls to function swap_writepage.", - EBPF_COMMON_DIMENSION_CALL, NETDATA_SYSTEM_CGROUP_SWAP_SUBMENU, - NETDATA_CGROUP_SWAP_WRITE_CONTEXT, NETDATA_EBPF_CHART_TYPE_LINE, - NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5101, - ebpf_create_global_dimension, - &swap_publish_aggregated[NETDATA_KEY_SWAP_WRITEPAGE_CALL], 1, - update_every, NETDATA_EBPF_MODULE_NAME_SWAP); -} - -/** - * Create specific swap charts - * - * Create charts for cgroup/application. - * - * @param type the chart type. - * @param update_every value to overwrite the update frequency set by the server. - */ -static void ebpf_obsolete_specific_swap_charts(char *type, int update_every) -{ - ebpf_write_chart_obsolete(type, NETDATA_MEM_SWAP_READ_CHART, "", "Calls to function swap_readpage.", - EBPF_COMMON_DIMENSION_CALL, NETDATA_SYSTEM_CGROUP_SWAP_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_SWAP_READ_CONTEXT, - NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5100, update_every); - - ebpf_write_chart_obsolete(type, NETDATA_MEM_SWAP_WRITE_CHART, "", "Calls to function swap_writepage.", - EBPF_COMMON_DIMENSION_CALL, NETDATA_SYSTEM_CGROUP_SWAP_SUBMENU, - NETDATA_EBPF_CHART_TYPE_LINE, NETDATA_CGROUP_SWAP_WRITE_CONTEXT, - NETDATA_CHART_PRIO_CGROUPS_CONTAINERS + 5101, update_every); -} - -/* - * Send Specific Swap data - * - * Send data for specific cgroup/apps. - * - * @param type chart type - * @param values structure with values that will be sent to netdata - */ -static void ebpf_send_specific_swap_data(char *type, netdata_publish_swap_t *values) -{ - ebpf_write_begin_chart(type, NETDATA_MEM_SWAP_READ_CHART, ""); - write_chart_dimension(swap_publish_aggregated[NETDATA_KEY_SWAP_READPAGE_CALL].name, (long long) values->read); - ebpf_write_end_chart(); - - ebpf_write_begin_chart(type, NETDATA_MEM_SWAP_WRITE_CHART, ""); - write_chart_dimension(swap_publish_aggregated[NETDATA_KEY_SWAP_WRITEPAGE_CALL].name, (long long) values->write); - ebpf_write_end_chart(); -} - -/** - * Create Systemd Swap Charts - * - * Create charts when systemd is enabled - * - * @param update_every value to overwrite the update frequency set by the server. - **/ -static void ebpf_create_systemd_swap_charts(int update_every) -{ - ebpf_create_charts_on_systemd(NETDATA_MEM_SWAP_READ_CHART, - "Calls to swap_readpage.", - EBPF_COMMON_DIMENSION_CALL, NETDATA_SYSTEM_CGROUP_SWAP_SUBMENU, - NETDATA_EBPF_CHART_TYPE_STACKED, 20191, - ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_SWAP_READ_CONTEXT, - NETDATA_EBPF_MODULE_NAME_SWAP, update_every); - - ebpf_create_charts_on_systemd(NETDATA_MEM_SWAP_WRITE_CHART, - "Calls to function swap_writepage.", - EBPF_COMMON_DIMENSION_CALL, NETDATA_SYSTEM_CGROUP_SWAP_SUBMENU, - NETDATA_EBPF_CHART_TYPE_STACKED, 20192, - ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX], NETDATA_SYSTEMD_SWAP_WRITE_CONTEXT, - NETDATA_EBPF_MODULE_NAME_SWAP, update_every); -} - -/** - * Send data to Netdata calling auxiliary functions. - * - * @param update_every value to overwrite the update frequency set by the server. -*/ -void ebpf_swap_send_cgroup_data(int update_every) -{ - if (!ebpf_cgroup_pids) - return; - - pthread_mutex_lock(&mutex_cgroup_shm); - ebpf_cgroup_target_t *ect; - for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { - ebpf_swap_sum_cgroup_pids(&ect->publish_systemd_swap, ect->pids); - } - - int has_systemd = shm_ebpf_cgroup.header->systemd_enabled; - - if (has_systemd) { - if (send_cgroup_chart) { - ebpf_create_systemd_swap_charts(update_every); - fflush(stdout); - } - ebpf_send_systemd_swap_charts(); - } - - for (ect = ebpf_cgroup_pids; ect ; ect = ect->next) { - if (ect->systemd) - continue; - - if (!(ect->flags & NETDATA_EBPF_CGROUP_HAS_SWAP_CHART) && ect->updated) { - ebpf_create_specific_swap_charts(ect->name, update_every); - ect->flags |= NETDATA_EBPF_CGROUP_HAS_SWAP_CHART; - } - - if (ect->flags & NETDATA_EBPF_CGROUP_HAS_SWAP_CHART) { - if (ect->updated) { - ebpf_send_specific_swap_data(ect->name, &ect->publish_systemd_swap); - } else { - ebpf_obsolete_specific_swap_charts(ect->name, update_every); - ect->flags &= ~NETDATA_EBPF_CGROUP_HAS_SWAP_CHART; - } - } - } - - pthread_mutex_unlock(&mutex_cgroup_shm); -} - -/** -* Main loop for this collector. -*/ -static void swap_collector(ebpf_module_t *em) -{ - int cgroup = em->cgroup_charts; - int update_every = em->update_every; - heartbeat_t hb; - heartbeat_init(&hb); - int counter = update_every - 1; - int maps_per_core = em->maps_per_core; - uint32_t running_time = 0; - uint32_t lifetime = em->lifetime; - netdata_idx_t *stats = em->hash_table_stats; - memset(stats, 0, sizeof(em->hash_table_stats)); - while (!ebpf_plugin_exit && running_time < lifetime) { - (void)heartbeat_next(&hb, USEC_PER_SEC); - if (ebpf_plugin_exit || ++counter != update_every) - continue; - - counter = 0; - netdata_apps_integration_flags_t apps = em->apps_charts; - ebpf_swap_read_global_table(stats, maps_per_core); - pthread_mutex_lock(&collect_data_mutex); - if (apps) - read_swap_apps_table(maps_per_core); - - if (cgroup) - ebpf_update_swap_cgroup(maps_per_core); - - pthread_mutex_lock(&lock); - - swap_send_global(); - - if (apps & NETDATA_EBPF_APPS_FLAG_CHART_CREATED) - ebpf_swap_send_apps_data(apps_groups_root_target); - - if (cgroup) - ebpf_swap_send_cgroup_data(update_every); - - pthread_mutex_unlock(&lock); - pthread_mutex_unlock(&collect_data_mutex); - - pthread_mutex_lock(&ebpf_exit_cleanup); - if (running_time && !em->running_time) - running_time = update_every; - else - running_time += update_every; - - em->running_time = running_time; - pthread_mutex_unlock(&ebpf_exit_cleanup); - } -} - -/***************************************************************** - * - * INITIALIZE THREAD - * - *****************************************************************/ - -/** - * Create apps charts - * - * Call ebpf_create_chart to create the charts on apps submenu. - * - * @param em a pointer to the structure with the default values. - */ -void ebpf_swap_create_apps_charts(struct ebpf_module *em, void *ptr) -{ - struct ebpf_target *root = ptr; - struct ebpf_target *w; - int update_every = em->update_every; - for (w = root; w; w = w->next) { - if (unlikely(!w->exposed)) - continue; - - ebpf_write_chart_cmd(NETDATA_APP_FAMILY, - w->clean_name, - "_ebpf_call_swap_readpage", - "Calls to function swap_readpage.", - EBPF_COMMON_DIMENSION_CALL, - NETDATA_EBPF_MEMORY_GROUP, - NETDATA_EBPF_CHART_TYPE_STACKED, - "app.ebpf_call_swap_readpage", - 20070, - update_every, - NETDATA_EBPF_MODULE_NAME_SWAP); - ebpf_create_chart_labels("app_group", w->name, 1); - ebpf_commit_label(); - fprintf(stdout, "DIMENSION calls '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX]); - - ebpf_write_chart_cmd(NETDATA_APP_FAMILY, - w->clean_name, - "_ebpf_call_swap_writepage", - "Calls to function swap_writepage.", - EBPF_COMMON_DIMENSION_CALL, - NETDATA_EBPF_MEMORY_GROUP, - NETDATA_EBPF_CHART_TYPE_STACKED, - "app.ebpf_call_swap_writepage", - 20071, - update_every, - NETDATA_EBPF_MODULE_NAME_SWAP); - ebpf_create_chart_labels("app_group", w->name, 1); - ebpf_commit_label(); - fprintf(stdout, "DIMENSION calls '' %s 1 1\n", ebpf_algorithms[NETDATA_EBPF_INCREMENTAL_IDX]); - - w->charts_created |= 1<<EBPF_MODULE_SWAP_IDX; - } - em->apps_charts |= NETDATA_EBPF_APPS_FLAG_CHART_CREATED; -} - -/** - * Allocate vectors used with this thread. - * - * We are not testing the return, because callocz does this and shutdown the software - * case it was not possible to allocate. - * - * @param apps is apps enabled? - */ -static void ebpf_swap_allocate_global_vectors(int apps) -{ - if (apps) - swap_pid = callocz((size_t)pid_max, sizeof(netdata_publish_swap_t *)); - - swap_vector = callocz((size_t)ebpf_nprocs, sizeof(netdata_publish_swap_t)); - - swap_values = callocz((size_t)ebpf_nprocs, sizeof(netdata_idx_t)); - - memset(swap_hash_values, 0, sizeof(swap_hash_values)); -} - -/***************************************************************** - * - * MAIN THREAD - * - *****************************************************************/ - -/** - * Create global charts - * - * Call ebpf_create_chart to create the charts for the collector. - * - * @param update_every value to overwrite the update frequency set by the server. - */ -static void ebpf_create_swap_charts(int update_every) -{ - ebpf_create_chart(NETDATA_EBPF_MEMORY_GROUP, NETDATA_MEM_SWAP_CHART, - "Calls to access swap memory", - EBPF_COMMON_DIMENSION_CALL, NETDATA_SYSTEM_SWAP_SUBMENU, - NULL, - NETDATA_EBPF_CHART_TYPE_LINE, - NETDATA_CHART_PRIO_MEM_SWAP_CALLS, - ebpf_create_global_dimension, - swap_publish_aggregated, NETDATA_SWAP_END, - update_every, NETDATA_EBPF_MODULE_NAME_SWAP); - - fflush(stdout); -} - -/* - * Load BPF - * - * Load BPF files. - * - * @param em the structure with configuration - */ -static int ebpf_swap_load_bpf(ebpf_module_t *em) -{ -#ifdef LIBBPF_MAJOR_VERSION - ebpf_define_map_type(em->maps, em->maps_per_core, running_on_kernel); -#endif - - int ret = 0; - ebpf_adjust_apps_cgroup(em, em->targets[NETDATA_KEY_SWAP_READPAGE_CALL].mode); - if (em->load & EBPF_LOAD_LEGACY) { - em->probe_links = ebpf_load_program(ebpf_plugin_dir, em, running_on_kernel, isrh, &em->objects); - if (!em->probe_links) { - ret = -1; - } - } -#ifdef LIBBPF_MAJOR_VERSION - else { - bpf_obj = swap_bpf__open(); - if (!bpf_obj) - ret = -1; - else - ret = ebpf_swap_load_and_attach(bpf_obj, em); - } -#endif - - if (ret) - netdata_log_error("%s %s", EBPF_DEFAULT_ERROR_MSG, em->info.thread_name); - - return ret; -} - -/** - * SWAP thread - * - * Thread used to make swap thread - * - * @param ptr a pointer to `struct ebpf_module` - * - * @return It always return NULL - */ -void *ebpf_swap_thread(void *ptr) -{ - netdata_thread_cleanup_push(ebpf_swap_exit, ptr); - - ebpf_module_t *em = (ebpf_module_t *)ptr; - em->maps = swap_maps; - - ebpf_update_pid_table(&swap_maps[NETDATA_PID_SWAP_TABLE], em); - -#ifdef LIBBPF_MAJOR_VERSION - ebpf_adjust_thread_load(em, default_btf); -#endif - if (ebpf_swap_load_bpf(em)) { - goto endswap; - } - - ebpf_swap_allocate_global_vectors(em->apps_charts); - - int algorithms[NETDATA_SWAP_END] = { NETDATA_EBPF_INCREMENTAL_IDX, NETDATA_EBPF_INCREMENTAL_IDX }; - ebpf_global_labels(swap_aggregated_data, swap_publish_aggregated, swap_dimension_name, swap_dimension_name, - algorithms, NETDATA_SWAP_END); - - pthread_mutex_lock(&lock); - ebpf_create_swap_charts(em->update_every); - ebpf_update_stats(&plugin_statistics, em); - ebpf_update_kernel_memory_with_vector(&plugin_statistics, em->maps, EBPF_ACTION_STAT_ADD); - pthread_mutex_unlock(&lock); - - swap_collector(em); - -endswap: - ebpf_update_disabled_plugin_stats(em); - - netdata_thread_cleanup_pop(1); - return NULL; -} |