X-Git-Url: https://git.octo.it/?p=collectd.git;a=blobdiff_plain;f=src%2Fintel_rdt.c;h=62848dbfe5e24046fae4a4f3ae76606720fb47b6;hp=667033c0cdf01131b9d8aaeec94dbfb0064a76c0;hb=0bbf058d6f9935e6e727cda7db79312281e2f58d;hpb=6e95561b485baf97a5657a6dde6165e5cfdd7ffd diff --git a/src/intel_rdt.c b/src/intel_rdt.c index 667033c0..62848dbf 100644 --- a/src/intel_rdt.c +++ b/src/intel_rdt.c @@ -1,7 +1,7 @@ /** * collectd - src/intel_rdt.c * - * Copyright(c) 2016-2018 Intel Corporation. All rights reserved. + * Copyright(c) 2016-2019 Intel Corporation. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal @@ -23,30 +23,68 @@ * * Authors: * Serhiy Pshyk + * Starzyk, Mateusz + * Wojciech Andralojc + * Michał Aleksiński **/ -#include "common.h" -#include "utils_config_cores.h" #include "collectd.h" - +#include "utils/common/common.h" +#include "utils/config_cores/config_cores.h" +#include "utils/proc_pids/proc_pids.h" #include #define RDT_PLUGIN "intel_rdt" +/* libpqos v2.0 or newer is required for process monitoring*/ +#undef LIBPQOS2 +#if defined(PQOS_VERSION) && PQOS_VERSION >= 20000 +#define LIBPQOS2 +#endif + +#define RDT_PLUGIN "intel_rdt" + #define RDT_MAX_SOCKETS 8 #define RDT_MAX_SOCKET_CORES 64 #define RDT_MAX_CORES (RDT_MAX_SOCKET_CORES * RDT_MAX_SOCKETS) +#ifdef LIBPQOS2 +/* + * Process name inside comm file is limited to 16 chars. + * More info here: http://man7.org/linux/man-pages/man5/proc.5.html + */ +#define RDT_MAX_NAMES_GROUPS 64 +#define RDT_PROC_PATH "/proc" +#endif /* LIBPQOS2 */ + typedef enum { UNKNOWN = 0, CONFIGURATION_ERROR, } rdt_config_status; +#ifdef LIBPQOS2 +struct rdt_name_group_s { + char *desc; + size_t num_names; + char **names; + proc_pids_t **proc_pids; + size_t monitored_pids_count; + enum pqos_mon_event events; +}; +typedef struct rdt_name_group_s rdt_name_group_t; +#endif /* LIBPQOS2 */ + struct rdt_ctx_s { core_groups_list_t cores; enum pqos_mon_event events[RDT_MAX_CORES]; - struct pqos_mon_data *pgroups[RDT_MAX_CORES]; - size_t num_groups; + struct pqos_mon_data *pcgroups[RDT_MAX_CORES]; +#ifdef LIBPQOS2 + rdt_name_group_t ngroups[RDT_MAX_NAMES_GROUPS]; + struct pqos_mon_data *pngroups[RDT_MAX_NAMES_GROUPS]; + size_t num_ngroups; + proc_pids_t **proc_pids; + size_t num_proc_pids; +#endif /* LIBPQOS2 */ const struct pqos_cpuinfo *pqos_cpu; const struct pqos_cap *pqos_cap; const struct pqos_capability *cap_mon; @@ -57,6 +95,40 @@ static rdt_ctx_t *g_rdt; static rdt_config_status g_state = UNKNOWN; +static int g_interface = -1; + +static void rdt_submit_derive(const char *cgroup, const char *type, + const char *type_instance, derive_t value) { + value_list_t vl = VALUE_LIST_INIT; + + vl.values = &(value_t){.derive = value}; + vl.values_len = 1; + + sstrncpy(vl.plugin, RDT_PLUGIN, sizeof(vl.plugin)); + ssnprintf(vl.plugin_instance, sizeof(vl.plugin_instance), "%s", cgroup); + sstrncpy(vl.type, type, sizeof(vl.type)); + if (type_instance) + sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance)); + + plugin_dispatch_values(&vl); +} + +static void rdt_submit_gauge(const char *cgroup, const char *type, + const char *type_instance, gauge_t value) { + value_list_t vl = VALUE_LIST_INIT; + + vl.values = &(value_t){.gauge = value}; + vl.values_len = 1; + + sstrncpy(vl.plugin, RDT_PLUGIN, sizeof(vl.plugin)); + ssnprintf(vl.plugin_instance, sizeof(vl.plugin_instance), "%s", cgroup); + sstrncpy(vl.type, type, sizeof(vl.type)); + if (type_instance) + sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance)); + + plugin_dispatch_values(&vl); +} + #if COLLECT_DEBUG static void rdt_dump_cgroups(void) { char cores[RDT_MAX_CORES * 4]; @@ -65,15 +137,15 @@ static void rdt_dump_cgroups(void) { return; DEBUG(RDT_PLUGIN ": Core Groups Dump"); - DEBUG(RDT_PLUGIN ": groups count: %" PRIsz, g_rdt->num_groups); + DEBUG(RDT_PLUGIN ": groups count: %" PRIsz, g_rdt->cores.num_cgroups); - for (size_t i = 0; i < g_rdt->num_groups; i++) { + for (size_t i = 0; i < g_rdt->cores.num_cgroups; i++) { core_group_t *cgroup = g_rdt->cores.cgroups + i; memset(cores, 0, sizeof(cores)); - for (int j = 0; j < cgroup->num_cores; j++) { - snprintf(cores + strlen(cores), sizeof(cores) - strlen(cores) - 1, " %d", - cgroup->cores[j]); + for (size_t j = 0; j < cgroup->num_cores; j++) { + ssnprintf(cores + strlen(cores), sizeof(cores) - strlen(cores) - 1, " %d", + cgroup->cores[j]); } DEBUG(RDT_PLUGIN ": group[%zu]:", i); @@ -85,40 +157,748 @@ static void rdt_dump_cgroups(void) { return; } +#ifdef LIBPQOS2 +static void rdt_dump_ngroups(void) { + + char names[DATA_MAX_NAME_LEN]; + + if (g_rdt == NULL) + return; + + DEBUG(RDT_PLUGIN ": Process Names Groups Dump"); + DEBUG(RDT_PLUGIN ": groups count: %" PRIsz, g_rdt->num_ngroups); + + for (size_t i = 0; i < g_rdt->num_ngroups; i++) { + memset(names, 0, sizeof(names)); + for (size_t j = 0; j < g_rdt->ngroups[i].num_names; j++) + ssnprintf(names + strlen(names), sizeof(names) - strlen(names) - 1, " %s", + g_rdt->ngroups[i].names[j]); + + DEBUG(RDT_PLUGIN ": group[%d]:", (int)i); + DEBUG(RDT_PLUGIN ": description: %s", g_rdt->ngroups[i].desc); + DEBUG(RDT_PLUGIN ": process names:%s", names); + DEBUG(RDT_PLUGIN ": events: 0x%X", g_rdt->ngroups[i].events); + } + + return; +} +#endif /* LIBPQOS2 */ + static inline double bytes_to_kb(const double bytes) { return bytes / 1024.0; } static inline double bytes_to_mb(const double bytes) { return bytes / (1024.0 * 1024.0); } -static void rdt_dump_data(void) { +static void rdt_dump_cores_data(void) { +/* + * CORE - monitored group of cores + * RMID - Resource Monitoring ID associated with the monitored group + * This is not available for monitoring with resource control + * LLC - last level cache occupancy + * MBL - local memory bandwidth + * MBR - remote memory bandwidth + */ +#ifdef LIBPQOS2 + if (g_interface == PQOS_INTER_OS_RESCTRL_MON) { + DEBUG(RDT_PLUGIN ": CORE LLC[KB] MBL[MB] MBR[MB]"); + } else { + DEBUG(RDT_PLUGIN ": CORE RMID LLC[KB] MBL[MB] MBR[MB]"); + } +#else + DEBUG(RDT_PLUGIN ": CORE RMID LLC[KB] MBL[MB] MBR[MB]"); +#endif /* LIBPQOS2 */ + + for (int i = 0; i < g_rdt->cores.num_cgroups; i++) { + const struct pqos_event_values *pv = &g_rdt->pcgroups[i]->values; + + double llc = bytes_to_kb(pv->llc); + double mbr = bytes_to_mb(pv->mbm_remote_delta); + double mbl = bytes_to_mb(pv->mbm_local_delta); +#ifdef LIBPQOS2 + if (g_interface == PQOS_INTER_OS_RESCTRL_MON) { + DEBUG(RDT_PLUGIN ": [%s] %10.1f %10.1f %10.1f", + g_rdt->cores.cgroups[i].desc, llc, mbl, mbr); + } else { + DEBUG(RDT_PLUGIN ": [%s] %8u %10.1f %10.1f %10.1f", + g_rdt->cores.cgroups[i].desc, g_rdt->pcgroups[i]->poll_ctx[0].rmid, + llc, mbl, mbr); + } +#else + DEBUG(RDT_PLUGIN ": [%s] %8u %10.1f %10.1f %10.1f", + g_rdt->cores.cgroups[i].desc, g_rdt->pcgroups[i]->poll_ctx[0].rmid, + llc, mbl, mbr); +#endif /* LIBPQOS2 */ + } +} + +#ifdef LIBPQOS2 +static void rdt_dump_pids_data(void) { /* - * CORE - monitored group of cores - * RMID - Resource Monitoring ID associated with the monitored group + * NAME - monitored group of processes + * PIDs - list of PID numbers in the NAME group * LLC - last level cache occupancy * MBL - local memory bandwidth * MBR - remote memory bandwidth */ - DEBUG(" CORE RMID LLC[KB] MBL[MB] MBR[MB]"); - for (int i = 0; i < g_rdt->num_groups; i++) { - const struct pqos_event_values *pv = &g_rdt->pgroups[i]->values; + DEBUG(RDT_PLUGIN ": NAME PIDs"); + char pids[DATA_MAX_NAME_LEN]; + for (size_t i = 0; i < g_rdt->num_ngroups; ++i) { + memset(pids, 0, sizeof(pids)); + for (size_t j = 0; j < g_rdt->ngroups[i].num_names; ++j) { + pids_list_t *list = g_rdt->ngroups[i].proc_pids[j]->curr; + for (size_t k = 0; k < list->size; k++) + ssnprintf(pids + strlen(pids), sizeof(pids) - strlen(pids) - 1, " %u", + list->pids[k]); + } + DEBUG(RDT_PLUGIN ": [%s] %s", g_rdt->ngroups[i].desc, pids); + } + + DEBUG(RDT_PLUGIN ": NAME LLC[KB] MBL[MB] MBR[MB]"); + for (size_t i = 0; i < g_rdt->num_ngroups; i++) { + + const struct pqos_event_values *pv = &g_rdt->pngroups[i]->values; double llc = bytes_to_kb(pv->llc); double mbr = bytes_to_mb(pv->mbm_remote_delta); double mbl = bytes_to_mb(pv->mbm_local_delta); - DEBUG(" [%s] %8u %10.1f %10.1f %10.1f", g_rdt->cores.cgroups[i].desc, - g_rdt->pgroups[i]->poll_ctx[0].rmid, llc, mbl, mbr); + DEBUG(RDT_PLUGIN ": [%s] %10.1f %10.1f %10.1f", g_rdt->ngroups[i].desc, + llc, mbl, mbr); + } +} +#endif /* LIBPQOS2 */ +#endif /* COLLECT_DEBUG */ + +#ifdef LIBPQOS2 +static int isdupstr(const char *names[], const size_t size, const char *name) { + for (size_t i = 0; i < size; i++) + if (strncmp(names[i], name, (size_t)MAX_PROC_NAME_LEN) == 0) + return 1; + + return 0; +} + +/* + * NAME + * strlisttoarray + * + * DESCRIPTION + * Converts string representing list of strings into array of strings. + * Allowed format is: + * name,name1,name2,name3 + * + * PARAMETERS + * `str_list' String representing list of strings. + * `names' Array to put extracted strings into. + * `names_num' Variable to put number of extracted strings. + * + * RETURN VALUE + * Number of elements placed into names. + */ +static int strlisttoarray(char *str_list, char ***names, size_t *names_num) { + char *saveptr = NULL; + + if (str_list == NULL || names == NULL) + return -EINVAL; + + if (strstr(str_list, ",,")) { + /* strtok ignores empty words between separators. + * This condition handles that by rejecting strings + * with consecutive seprators */ + ERROR(RDT_PLUGIN ": Empty process name"); + return -EINVAL; + } + + for (;;) { + char *token = strtok_r(str_list, ",", &saveptr); + if (token == NULL) + break; + + str_list = NULL; + + while (isspace(*token)) + token++; + + if (*token == '\0') + continue; + + if ((isdupstr((const char **)*names, *names_num, token))) { + if (str_list != NULL) + ERROR(RDT_PLUGIN ": Duplicated process name \'%s\' in group \'%s\'", + token, str_list); + else + ERROR(RDT_PLUGIN ": Duplicated process name \'%s\'", token); + + return -EINVAL; + } else { + if (0 != strarray_add(names, names_num, token)) { + ERROR(RDT_PLUGIN ": Error allocating process name string"); + return -ENOMEM; + } + } + } + + return 0; +} + +/* + * NAME + * ngroup_cmp + * + * DESCRIPTION + * Function to compare names in two name groups. + * + * PARAMETERS + * `ng_a' Pointer to name group a. + * `ng_b' Pointer to name group b. + * + * RETURN VALUE + * 1 if both groups contain the same names + * 0 if none of their names match + * -1 if some but not all names match + */ +static int ngroup_cmp(const rdt_name_group_t *ng_a, + const rdt_name_group_t *ng_b) { + unsigned found = 0; + + assert(ng_a != NULL); + assert(ng_b != NULL); + + const size_t sz_a = (unsigned)ng_a->num_names; + const size_t sz_b = (unsigned)ng_b->num_names; + const char **tab_a = (const char **)ng_a->names; + const char **tab_b = (const char **)ng_b->names; + + for (size_t i = 0; i < sz_a; i++) { + for (size_t j = 0; j < sz_b; j++) + if (strncmp(tab_a[i], tab_b[j], (size_t)MAX_PROC_NAME_LEN) == 0) + found++; + } + /* if no names are the same */ + if (!found) + return 0; + /* if group contains same names */ + if (sz_a == sz_b && sz_b == (size_t)found) + return 1; + /* if not all names are the same */ + return -1; +} + +/* + * NAME + * oconfig_to_ngroups + * + * DESCRIPTION + * Function to set the descriptions and names for each process names group. + * Takes a config option containing list of strings that are used to set + * process group values. + * + * PARAMETERS + * `item' Config option containing process names groups. + * `groups' Table of process name groups to set values in. + * `max_groups' Maximum number of process name groups allowed. + * + * RETURN VALUE + * On success, the number of name groups set up. On error, appropriate + * negative error value. + */ +static int oconfig_to_ngroups(const oconfig_item_t *item, + rdt_name_group_t *groups, + const size_t max_groups) { + int index = 0; + + assert(groups != NULL); + assert(max_groups > 0); + assert(item != NULL); + + for (int j = 0; j < item->values_num; j++) { + int ret; + char value[DATA_MAX_NAME_LEN]; + + if ((item->values[j].value.string == NULL) || + (strlen(item->values[j].value.string) == 0)) { + ERROR(RDT_PLUGIN ": Error - empty group"); + return -EINVAL; + } + + sstrncpy(value, item->values[j].value.string, sizeof(value)); + + ret = strlisttoarray(value, &groups[index].names, &groups[index].num_names); + if (ret != 0 || groups[index].num_names == 0) { + ERROR(RDT_PLUGIN ": Error parsing process names group (%s)", + item->values[j].value.string); + return -EINVAL; + } + + /* set group description info */ + groups[index].desc = sstrdup(item->values[j].value.string); + if (groups[index].desc == NULL) { + ERROR(RDT_PLUGIN ": Error allocating name group description"); + return -ENOMEM; + } + + groups[index].proc_pids = NULL; + groups[index].monitored_pids_count = 0; + + index++; + + if (index >= (const int)max_groups) { + WARNING(RDT_PLUGIN ": Too many process names groups configured"); + return index; + } + } + + return index; +} + +/* + * NAME + * rdt_free_ngroups + * + * DESCRIPTION + * Function to deallocate memory allocated for name groups. + * + * PARAMETERS + * `rdt' Pointer to rdt context + */ +static void rdt_free_ngroups(rdt_ctx_t *rdt) { + for (int i = 0; i < RDT_MAX_NAMES_GROUPS; i++) { + if (rdt->ngroups[i].desc) + DEBUG(RDT_PLUGIN ": Freeing pids \'%s\' group\'s data...", + rdt->ngroups[i].desc); + sfree(rdt->ngroups[i].desc); + strarray_free(rdt->ngroups[i].names, rdt->ngroups[i].num_names); + + if (rdt->ngroups[i].proc_pids) + proc_pids_free(rdt->ngroups[i].proc_pids, rdt->ngroups[i].num_names); + + rdt->ngroups[i].num_names = 0; + sfree(rdt->pngroups[i]); + } + if (rdt->proc_pids) + sfree(rdt->proc_pids); + + rdt->num_ngroups = 0; +} + +/* + * NAME + * rdt_config_ngroups + * + * DESCRIPTION + * Reads name groups configuration. + * + * PARAMETERS + * `rdt` Pointer to rdt context + * `item' Config option containing process names groups. + * + * RETURN VALUE + * 0 on success. Negative number on error. + */ +static int rdt_config_ngroups(rdt_ctx_t *rdt, const oconfig_item_t *item) { + int n = 0; + enum pqos_mon_event events = 0; + + if (item == NULL) { + DEBUG(RDT_PLUGIN ": ngroups_config: Invalid argument."); + return -EINVAL; + } + + DEBUG(RDT_PLUGIN ": Process names groups [%d]:", item->values_num); + for (int j = 0; j < item->values_num; j++) { + if (item->values[j].type != OCONFIG_TYPE_STRING) { + ERROR(RDT_PLUGIN + ": given process names group value is not a string [idx=%d]", + j); + return -EINVAL; + } + DEBUG(RDT_PLUGIN ": [%d]: %s", j, item->values[j].value.string); + } + + n = oconfig_to_ngroups(item, rdt->ngroups, RDT_MAX_NAMES_GROUPS); + if (n < 0) { + rdt_free_ngroups(rdt); + ERROR(RDT_PLUGIN ": Error parsing process name groups configuration."); + return -EINVAL; + } + + /* validate configured process name values */ + for (int group_idx = 0; group_idx < n; group_idx++) { + DEBUG(RDT_PLUGIN ": checking group [%d]: %s", group_idx, + rdt->ngroups[group_idx].desc); + for (size_t name_idx = 0; name_idx < rdt->ngroups[group_idx].num_names; + name_idx++) { + DEBUG(RDT_PLUGIN ": checking process name [%zu]: %s", name_idx, + rdt->ngroups[group_idx].names[name_idx]); + if (!proc_pids_is_name_valid(rdt->ngroups[group_idx].names[name_idx])) { + ERROR(RDT_PLUGIN ": Process name group '%s' contains invalid name '%s'", + rdt->ngroups[group_idx].desc, + rdt->ngroups[group_idx].names[name_idx]); + rdt_free_ngroups(rdt); + return -EINVAL; + } + } + } + + if (n == 0) { + ERROR(RDT_PLUGIN ": Empty process name groups configured."); + return -EINVAL; + } + + /* Get all available events on this platform */ + for (unsigned i = 0; i < rdt->cap_mon->u.mon->num_events; i++) + events |= rdt->cap_mon->u.mon->events[i].type; + + events &= ~(PQOS_PERF_EVENT_LLC_MISS); + + DEBUG(RDT_PLUGIN ": Available events to monitor: %#x", events); + + rdt->num_ngroups = n; + for (int i = 0; i < n; i++) { + for (int j = 0; j < i; j++) { + int found = ngroup_cmp(&rdt->ngroups[j], &rdt->ngroups[i]); + if (found != 0) { + rdt_free_ngroups(rdt); + ERROR(RDT_PLUGIN + ": Cannot monitor same process name in different groups."); + return -EINVAL; + } + } + + rdt->ngroups[i].events = events; + rdt->pngroups[i] = calloc(1, sizeof(*rdt->pngroups[i])); + if (rdt->pngroups[i] == NULL) { + rdt_free_ngroups(rdt); + ERROR(RDT_PLUGIN + ": Failed to allocate memory for process name monitoring data."); + return -ENOMEM; + } + } + + return 0; +} + +/* + * NAME + * rdt_refresh_ngroup + * + * DESCRIPTION + * Refresh pids monitored by name group. + * + * PARAMETERS + * `ngroup` Pointer to name group. + * `group_mon_data' PQoS monitoring context. + * + * RETURN VALUE + * 0 on success. Negative number on error. + */ +static int rdt_refresh_ngroup(rdt_name_group_t *ngroup, + struct pqos_mon_data *group_mon_data) { + + int result = 0; + + if (NULL == ngroup) + return -1; + + if (NULL == ngroup->proc_pids) { + ERROR(RDT_PLUGIN + ": rdt_refresh_ngroup: \'%s\' uninitialized process pids array.", + ngroup->desc); + + return -1; + } + + DEBUG(RDT_PLUGIN ": rdt_refresh_ngroup: \'%s\' process names group.", + ngroup->desc); + + proc_pids_t **proc_pids = ngroup->proc_pids; + pids_list_t added_pids; + pids_list_t removed_pids; + + memset(&added_pids, 0, sizeof(added_pids)); + memset(&removed_pids, 0, sizeof(removed_pids)); + + for (size_t i = 0; i < ngroup->num_names; ++i) { + int diff_result = pids_list_diff(proc_pids[i], &added_pids, &removed_pids); + if (0 != diff_result) { + ERROR(RDT_PLUGIN + ": rdt_refresh_ngroup: \'%s\'. Error [%d] during PID diff.", + ngroup->desc, diff_result); + result = -1; + goto cleanup; + } + } + + DEBUG(RDT_PLUGIN ": rdt_refresh_ngroup: \'%s\' process names group, added: " + "%u, removed: %u.", + ngroup->desc, (unsigned)added_pids.size, (unsigned)removed_pids.size); + + if (added_pids.size > 0) { + + /* no pids are monitored for this group yet: start monitoring */ + if (0 == ngroup->monitored_pids_count) { + + int start_result = + pqos_mon_start_pids(added_pids.size, added_pids.pids, ngroup->events, + (void *)ngroup->desc, group_mon_data); + if (PQOS_RETVAL_OK == start_result) { + ngroup->monitored_pids_count = added_pids.size; + } else { + ERROR(RDT_PLUGIN ": rdt_refresh_ngroup: \'%s\'. Error [%d] while " + "STARTING pids monitoring", + ngroup->desc, start_result); + result = -1; + goto pqos_error_recovery; + } + + } else { + + int add_result = + pqos_mon_add_pids(added_pids.size, added_pids.pids, group_mon_data); + if (PQOS_RETVAL_OK == add_result) + ngroup->monitored_pids_count += added_pids.size; + else { + ERROR(RDT_PLUGIN + ": rdt_refresh_ngroup: \'%s\'. Error [%d] while ADDING pids.", + ngroup->desc, add_result); + result = -1; + goto pqos_error_recovery; + } + } } + + if (removed_pids.size > 0) { + + /* all pids are removed: stop monitoring */ + if (removed_pids.size == ngroup->monitored_pids_count) { + /* all pids for this group are lost: stop monitoring */ + int stop_result = pqos_mon_stop(group_mon_data); + if (PQOS_RETVAL_OK != stop_result) { + ERROR(RDT_PLUGIN ": rdt_refresh_ngroup: \'%s\'. Error [%d] while " + "STOPPING monitoring", + ngroup->desc, stop_result); + result = -1; + goto pqos_error_recovery; + } + ngroup->monitored_pids_count = 0; + } else { + int remove_result = pqos_mon_remove_pids( + removed_pids.size, removed_pids.pids, group_mon_data); + if (PQOS_RETVAL_OK == remove_result) { + ngroup->monitored_pids_count -= removed_pids.size; + } else { + ERROR(RDT_PLUGIN + ": rdt_refresh_ngroup: \'%s\'. Error [%d] while REMOVING pids.", + ngroup->desc, remove_result); + result = -1; + goto pqos_error_recovery; + } + } + } + + goto cleanup; + +pqos_error_recovery: + /* Why? + * Resources might be temporary unavailable. + * + * How? + * Collectd will halt the reading thread for this + * plugin if it returns an error. + * Consecutive errors will be increasing the read period + * up to 1 day interval. + * On pqos error stop monitoring current group + * and reset the proc_pids array + * monitoring will be restarted on next collectd read cycle + */ + DEBUG(RDT_PLUGIN ": rdt_refresh_ngroup: \'%s\' group RESET after error.", + ngroup->desc); + pqos_mon_stop(group_mon_data); + for (size_t i = 0; i < ngroup->num_names; ++i) + if (ngroup->proc_pids[i]->curr) + ngroup->proc_pids[i]->curr->size = 0; + + ngroup->monitored_pids_count = 0; + +cleanup: + pids_list_clear(&added_pids); + pids_list_clear(&removed_pids); + + return result; } + +/* + * NAME + * read_pids_data + * + * DESCRIPTION + * Poll monitoring statistics for name groups + * + * RETURN VALUE + * 0 on success. Negative number on error. + */ +static int read_pids_data() { + + if (0 == g_rdt->num_ngroups) { + DEBUG(RDT_PLUGIN ": read_pids_data: not configured - PIDs read skipped"); + return 0; + } + + DEBUG(RDT_PLUGIN ": read_pids_data: Scanning active groups"); + struct pqos_mon_data *active_groups[RDT_MAX_NAMES_GROUPS] = {0}; + size_t active_group_idx = 0; + for (size_t pngroups_idx = 0; + pngroups_idx < STATIC_ARRAY_SIZE(g_rdt->pngroups); ++pngroups_idx) + if (0 != g_rdt->ngroups[pngroups_idx].monitored_pids_count) + active_groups[active_group_idx++] = g_rdt->pngroups[pngroups_idx]; + + int ret = 0; + + if (0 == active_group_idx) { + DEBUG(RDT_PLUGIN ": read_pids_data: no active groups - PIDs read skipped"); + goto groups_refresh; + } + + DEBUG(RDT_PLUGIN ": read_pids_data: PIDs data polling"); + + int poll_result = pqos_mon_poll(active_groups, active_group_idx); + if (poll_result != PQOS_RETVAL_OK) { + ERROR(RDT_PLUGIN ": read_pids_data: Failed to poll monitoring data for " + "pids. Error [%d].", + poll_result); + ret = -poll_result; + goto groups_refresh; + } + + for (size_t i = 0; i < g_rdt->num_ngroups; i++) { + enum pqos_mon_event mbm_events = + (PQOS_MON_EVENT_LMEM_BW | PQOS_MON_EVENT_TMEM_BW | + PQOS_MON_EVENT_RMEM_BW); + + if (g_rdt->pngroups[i] == NULL || + g_rdt->ngroups[i].monitored_pids_count == 0) + continue; + + const struct pqos_event_values *pv = &g_rdt->pngroups[i]->values; + + /* Submit only monitored events data */ + + if (g_rdt->ngroups[i].events & PQOS_MON_EVENT_L3_OCCUP) + rdt_submit_gauge(g_rdt->ngroups[i].desc, "bytes", "llc", pv->llc); + + if (g_rdt->ngroups[i].events & PQOS_PERF_EVENT_IPC) + rdt_submit_gauge(g_rdt->ngroups[i].desc, "ipc", NULL, pv->ipc); + + if (g_rdt->ngroups[i].events & mbm_events) { + rdt_submit_derive(g_rdt->ngroups[i].desc, "memory_bandwidth", "local", + pv->mbm_local_delta); + rdt_submit_derive(g_rdt->ngroups[i].desc, "memory_bandwidth", "remote", + pv->mbm_remote_delta); + } + } + +#if COLLECT_DEBUG + rdt_dump_pids_data(); #endif /* COLLECT_DEBUG */ +groups_refresh: + ret = proc_pids_update(RDT_PROC_PATH, g_rdt->proc_pids, g_rdt->num_proc_pids); + if (0 != ret) { + ERROR(RDT_PLUGIN ": Initial update of proc pids failed"); + return ret; + } + + for (size_t i = 0; i < g_rdt->num_ngroups; i++) { + int refresh_result = + rdt_refresh_ngroup(&(g_rdt->ngroups[i]), g_rdt->pngroups[i]); + + if (0 != refresh_result) { + ERROR(RDT_PLUGIN ": read_pids_data: NGroup %zu refresh failed. Error: %d", + i, refresh_result); + if (0 == ret) { + /* refresh error will be escalated only if there were no + * errors before. + */ + ret = refresh_result; + } + } + } + + assert(ret <= 0); + return ret; +} + +/* + * NAME + * rdt_init_pids_monitoring + * + * DESCRIPTION + * Initialize pids monitoring for all name groups + */ +static void rdt_init_pids_monitoring() { + for (size_t group_idx = 0; group_idx < g_rdt->num_ngroups; group_idx++) { + /* + * Each group must have not-null proc_pids array. + * Initial refresh is not mandatory for proper + * PIDs statistics detection. + */ + rdt_name_group_t *ng = &g_rdt->ngroups[group_idx]; + int init_result = + proc_pids_init((const char **)ng->names, ng->num_names, &ng->proc_pids); + if (0 != init_result) { + ERROR(RDT_PLUGIN + ": Initialization of proc_pids for group %zu failed. Error: %d", + group_idx, init_result); + continue; + } + + /* update global proc_pids table */ + proc_pids_t **proc_pids = + realloc(g_rdt->proc_pids, (g_rdt->num_proc_pids + ng->num_names) * + sizeof(*g_rdt->proc_pids)); + if (NULL == proc_pids) { + ERROR(RDT_PLUGIN ": Alloc error\n"); + continue; + } + + for (size_t i = 0; i < ng->num_names; i++) + proc_pids[g_rdt->num_proc_pids + i] = ng->proc_pids[i]; + + g_rdt->proc_pids = proc_pids; + g_rdt->num_proc_pids += ng->num_names; + } + + if (g_rdt->num_ngroups > 0) { + int update_result = + proc_pids_update(RDT_PROC_PATH, g_rdt->proc_pids, g_rdt->num_proc_pids); + if (0 != update_result) + ERROR(RDT_PLUGIN ": Initial update of proc pids failed"); + } + + for (size_t group_idx = 0; group_idx < g_rdt->num_ngroups; group_idx++) { + int refresh_result = rdt_refresh_ngroup(&(g_rdt->ngroups[group_idx]), + g_rdt->pngroups[group_idx]); + if (0 != refresh_result) + ERROR(RDT_PLUGIN ": Initial refresh of group %zu failed. Error: %d", + group_idx, refresh_result); + } +} +#endif /* LIBPQOS2 */ +/* + * NAME + * rdt_free_cgroups + * + * DESCRIPTION + * Function to deallocate memory allocated for core groups. + */ static void rdt_free_cgroups(void) { config_cores_cleanup(&g_rdt->cores); for (int i = 0; i < RDT_MAX_CORES; i++) { - sfree(g_rdt->pgroups[i]); + sfree(g_rdt->pcgroups[i]); } + g_rdt->cores.num_cgroups = 0; } static int rdt_default_cgroups(void) { @@ -137,7 +917,7 @@ static int rdt_default_cgroups(void) { char desc[DATA_MAX_NAME_LEN]; /* set core group info */ - cgroup->cores = calloc(1, sizeof(*(cgroup->cores))); + cgroup->cores = calloc(1, sizeof(*cgroup->cores)); if (cgroup->cores == NULL) { ERROR(RDT_PLUGIN ": Error allocating cores array"); rdt_free_cgroups(); @@ -146,7 +926,7 @@ static int rdt_default_cgroups(void) { cgroup->num_cores = 1; cgroup->cores[0] = i; - snprintf(desc, sizeof(desc), "%d", g_rdt->pqos_cpu->cores[i].lcore); + ssnprintf(desc, sizeof(desc), "%d", g_rdt->pqos_cpu->cores[i].lcore); cgroup->desc = strdup(desc); if (cgroup->desc == NULL) { ERROR(RDT_PLUGIN ": Error allocating core group description"); @@ -214,9 +994,9 @@ static int rdt_config_cgroups(oconfig_item_t *item) { g_rdt->pqos_cpu->num_cores); DEBUG(RDT_PLUGIN ": Available events to monitor: %#x", events); - g_rdt->num_groups = n; - for (size_t i = 0; i < n; i++) { - for (size_t j = 0; j < i; j++) { + g_rdt->cores.num_cgroups = n; + for (int i = 0; i < n; i++) { + for (int j = 0; j < i; j++) { int found = 0; found = config_cores_cmp_cgroups(&g_rdt->cores.cgroups[j], &g_rdt->cores.cgroups[i]); @@ -228,8 +1008,8 @@ static int rdt_config_cgroups(oconfig_item_t *item) { } g_rdt->events[i] = events; - g_rdt->pgroups[i] = calloc(1, sizeof(*g_rdt->pgroups[i])); - if (g_rdt->pgroups[i] == NULL) { + g_rdt->pcgroups[i] = calloc(1, sizeof(*g_rdt->pcgroups[i])); + if (g_rdt->pcgroups[i] == NULL) { rdt_free_cgroups(); ERROR(RDT_PLUGIN ": Failed to allocate memory for monitoring data."); return -ENOMEM; @@ -260,14 +1040,34 @@ static int rdt_preinit(void) { struct pqos_config pqos = {.fd_log = -1, .callback_log = rdt_pqos_log, .context_log = NULL, - .verbose = 0}; + .verbose = 0, +#ifdef LIBPQOS2 + .interface = PQOS_INTER_OS_RESCTRL_MON}; + DEBUG(RDT_PLUGIN ": Initializing PQoS with RESCTRL interface"); +#else + .interface = PQOS_INTER_MSR}; + DEBUG(RDT_PLUGIN ": Initializing PQoS with MSR interface"); +#endif ret = pqos_init(&pqos); + DEBUG(RDT_PLUGIN ": PQoS initialization result: [%d]", ret); + +#ifdef LIBPQOS2 + if (ret == PQOS_RETVAL_INTER) { + pqos.interface = PQOS_INTER_MSR; + DEBUG(RDT_PLUGIN ": Initializing PQoS with MSR interface"); + ret = pqos_init(&pqos); + DEBUG(RDT_PLUGIN ": PQoS initialization result: [%d]", ret); + } +#endif + if (ret != PQOS_RETVAL_OK) { ERROR(RDT_PLUGIN ": Error initializing PQoS library!"); goto rdt_preinit_error1; } + g_interface = pqos.interface; + ret = pqos_cap_get(&g_rdt->pqos_cap, &g_rdt->pqos_cpu); if (ret != PQOS_RETVAL_OK) { ERROR(RDT_PLUGIN ": Error retrieving PQoS capabilities."); @@ -296,7 +1096,6 @@ rdt_preinit_error2: pqos_fini(); rdt_preinit_error1: - sfree(g_rdt); return -1; @@ -309,25 +1108,66 @@ static int rdt_config(oconfig_item_t *ci) { reports a failure in configuration and aborts */ - return (0); + return 0; } for (int i = 0; i < ci->children_num; i++) { oconfig_item_t *child = ci->children + i; - if (strcasecmp("Cores", child->key) == 0) { - if (rdt_config_cgroups(child) != 0) { + if (strncasecmp("Cores", child->key, (size_t)strlen("Cores")) == 0) { + if (g_rdt->cores.num_cgroups > 0) { + ERROR(RDT_PLUGIN + ": Configuration parameter \"%s\" can be used only once.", + child->key); + g_state = CONFIGURATION_ERROR; + } else if (rdt_config_cgroups(child) != 0) g_state = CONFIGURATION_ERROR; + + if (g_state == CONFIGURATION_ERROR) /* if we return -1 at this point collectd reports a failure in configuration and aborts */ - return (0); - } + return 0; #if COLLECT_DEBUG rdt_dump_cgroups(); #endif /* COLLECT_DEBUG */ + } else if (strncasecmp("Processes", child->key, + (size_t)strlen("Processes")) == 0) { +#ifdef LIBPQOS2 + if (g_interface != PQOS_INTER_OS_RESCTRL_MON) { + ERROR(RDT_PLUGIN ": Configuration parameter \"%s\" not supported. " + "Resctrl monitoring is needed for PIDs monitoring.", + child->key); + g_state = CONFIGURATION_ERROR; + } + + else if (g_rdt->num_ngroups > 0) { + ERROR(RDT_PLUGIN + ": Configuration parameter \"%s\" can be used only once.", + child->key); + g_state = CONFIGURATION_ERROR; + } + + else if (rdt_config_ngroups(g_rdt, child) != 0) + g_state = CONFIGURATION_ERROR; + + if (g_state == CONFIGURATION_ERROR) + /* if we return -1 at this point collectd + reports a failure in configuration and + aborts + */ + return 0; + +#if COLLECT_DEBUG + rdt_dump_ngroups(); +#endif /* COLLECT_DEBUG */ +#else /* !LIBPQOS2 */ + ERROR(RDT_PLUGIN ": Configuration parameter \"%s\" not supported, please " + "recompile collectd with libpqos version 2.0 or newer.", + child->key); +#endif /* LIBPQOS2 */ } else { ERROR(RDT_PLUGIN ": Unknown configuration parameter \"%s\".", child->key); } @@ -336,64 +1176,30 @@ static int rdt_config(oconfig_item_t *ci) { return 0; } -static void rdt_submit_derive(char *cgroup, char *type, char *type_instance, - derive_t value) { - value_list_t vl = VALUE_LIST_INIT; +static int read_cores_data() { - vl.values = &(value_t){.derive = value}; - vl.values_len = 1; - - sstrncpy(vl.plugin, RDT_PLUGIN, sizeof(vl.plugin)); - snprintf(vl.plugin_instance, sizeof(vl.plugin_instance), "%s", cgroup); - sstrncpy(vl.type, type, sizeof(vl.type)); - if (type_instance) - sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance)); - - plugin_dispatch_values(&vl); -} - -static void rdt_submit_gauge(char *cgroup, char *type, char *type_instance, - gauge_t value) { - value_list_t vl = VALUE_LIST_INIT; - - vl.values = &(value_t){.gauge = value}; - vl.values_len = 1; - - sstrncpy(vl.plugin, RDT_PLUGIN, sizeof(vl.plugin)); - snprintf(vl.plugin_instance, sizeof(vl.plugin_instance), "%s", cgroup); - sstrncpy(vl.type, type, sizeof(vl.type)); - if (type_instance) - sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance)); - - plugin_dispatch_values(&vl); -} - -static int rdt_read(__attribute__((unused)) user_data_t *ud) { - int ret; - - if (g_rdt == NULL) { - ERROR(RDT_PLUGIN ": rdt_read: plugin not initialized."); - return -EINVAL; + if (0 == g_rdt->cores.num_cgroups) { + DEBUG(RDT_PLUGIN ": read_cores_data: not configured - Cores read skipped"); + return 0; } + DEBUG(RDT_PLUGIN ": read_cores_data: Cores data poll"); - ret = pqos_mon_poll(&g_rdt->pgroups[0], (unsigned)g_rdt->num_groups); + int ret = + pqos_mon_poll(&g_rdt->pcgroups[0], (unsigned)g_rdt->cores.num_cgroups); if (ret != PQOS_RETVAL_OK) { - ERROR(RDT_PLUGIN ": Failed to poll monitoring data."); + ERROR(RDT_PLUGIN ": read_cores_data: Failed to poll monitoring data for " + "cores. Error [%d].", + ret); return -1; } -#if COLLECT_DEBUG - rdt_dump_data(); -#endif /* COLLECT_DEBUG */ - - for (size_t i = 0; i < g_rdt->num_groups; i++) { + for (size_t i = 0; i < g_rdt->cores.num_cgroups; i++) { core_group_t *cgroup = g_rdt->cores.cgroups + i; - enum pqos_mon_event mbm_events = (PQOS_MON_EVENT_LMEM_BW | PQOS_MON_EVENT_TMEM_BW | PQOS_MON_EVENT_RMEM_BW); - const struct pqos_event_values *pv = &g_rdt->pgroups[i]->values; + const struct pqos_event_values *pv = &g_rdt->pcgroups[i]->values; /* Submit only monitored events data */ @@ -411,30 +1217,74 @@ static int rdt_read(__attribute__((unused)) user_data_t *ud) { } } +#if COLLECT_DEBUG + rdt_dump_cores_data(); +#endif /* COLLECT_DEBUG */ + return 0; } -static int rdt_init(void) { - int ret; +static int rdt_read(__attribute__((unused)) user_data_t *ud) { - if (g_state == CONFIGURATION_ERROR) - return -1; + if (g_rdt == NULL) { + ERROR(RDT_PLUGIN ": rdt_read: plugin not initialized."); + return -EINVAL; + } - ret = rdt_preinit(); - if (ret != 0) - return ret; + int cores_read_result = read_cores_data(); + +#ifdef LIBPQOS2 + int pids_read_result = read_pids_data(); +#endif /* LIBPQOS2 */ + + if (0 != cores_read_result) + return cores_read_result; + +#ifdef LIBPQOS2 + if (0 != pids_read_result) + return pids_read_result; +#endif /* LIBPQOS2 */ - /* Start monitoring */ - for (size_t i = 0; i < g_rdt->num_groups; i++) { + return 0; +} + +static void rdt_init_cores_monitoring() { + for (size_t i = 0; i < g_rdt->cores.num_cgroups; i++) { core_group_t *cg = g_rdt->cores.cgroups + i; - ret = pqos_mon_start(cg->num_cores, cg->cores, g_rdt->events[i], - (void *)cg->desc, g_rdt->pgroups[i]); + int mon_start_result = + pqos_mon_start(cg->num_cores, cg->cores, g_rdt->events[i], + (void *)cg->desc, g_rdt->pcgroups[i]); - if (ret != PQOS_RETVAL_OK) - ERROR(RDT_PLUGIN ": Error starting monitoring group %s (pqos status=%d)", - cg->desc, ret); + if (mon_start_result != PQOS_RETVAL_OK) + ERROR(RDT_PLUGIN + ": Error starting cores monitoring group %s (pqos status=%d)", + cg->desc, mon_start_result); } +} + +static int rdt_init(void) { + + if (g_state == CONFIGURATION_ERROR) { + if (g_rdt != NULL) { + if (g_rdt->cores.num_cgroups > 0) + rdt_free_cgroups(); +#ifdef LIBPQOS2 + if (g_rdt->num_ngroups > 0) + rdt_free_ngroups(g_rdt); +#endif + } + return -1; + } + + int rdt_preinint_result = rdt_preinit(); + if (rdt_preinint_result != 0) + return rdt_preinint_result; + + rdt_init_cores_monitoring(); +#ifdef LIBPQOS2 + rdt_init_pids_monitoring(); +#endif /* LIBPQOS2 */ return 0; } @@ -447,16 +1297,24 @@ static int rdt_shutdown(void) { if (g_rdt == NULL) return 0; - /* Stop monitoring */ - for (size_t i = 0; i < g_rdt->num_groups; i++) { - pqos_mon_stop(g_rdt->pgroups[i]); + /* Stop monitoring cores */ + for (size_t i = 0; i < g_rdt->cores.num_cgroups; i++) { + pqos_mon_stop(g_rdt->pcgroups[i]); } +/* Stop pids monitoring */ +#ifdef LIBPQOS2 + for (size_t i = 0; i < g_rdt->num_ngroups; i++) + pqos_mon_stop(g_rdt->pngroups[i]); +#endif + ret = pqos_fini(); if (ret != PQOS_RETVAL_OK) ERROR(RDT_PLUGIN ": Error shutting down PQoS library."); - rdt_free_cgroups(); +#ifdef LIBPQOS2 + rdt_free_ngroups(g_rdt); +#endif /* LIBPQOS2 */ sfree(g_rdt); return 0;