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Dpdk: Add DPDK telemetry
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‎Makefile.am‎

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@@ -182,6 +182,8 @@ ipfixprobe_input_src+=\
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input/dpdk/dpdkDevice.cpp \
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input/dpdk/dpdkPortTelemetry.hpp \
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input/dpdk/dpdkPortTelemetry.cpp \
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input/dpdk/dpdkTelemetry.hpp \
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input/dpdk/dpdkTelemetry.cpp \
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input/dpdk.cpp \
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input/dpdk.h \
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input/dpdk-ring.cpp \

‎input/dpdk.cpp‎

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@@ -242,6 +242,8 @@ void DpdkReader::configure_telemetry_dirs(
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telemetry::FileOps statsOps = {[=]() { return get_queue_telemetry(); }, nullptr};
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register_file(queues_dir, "input-stats", statsOps);
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m_dpdkTelemetry = std::make_unique<DpdkTelemetry>(plugin_dir);
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}
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void DpdkReader::init(const char* params)

‎input/dpdk.h‎

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@@ -32,6 +32,7 @@
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#include "dpdk/dpdkDevice.hpp"
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#include "dpdk/dpdkPortTelemetry.hpp"
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#include "dpdk/dpdkTelemetry.hpp"
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#include <ipfixprobe/input.hpp>
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#include <ipfixprobe/utils.hpp>
@@ -228,6 +229,7 @@ class DpdkReader : public InputPlugin {
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telemetry::Content get_port_telemetry(uint16_t portNumber);
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std::vector<DpdkPortTelemetry> m_portsTelemetry;
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std::unique_ptr<DpdkTelemetry> m_dpdkTelemetry;
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struct DpdkRxStats {
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uint64_t receivedPackets;

‎input/dpdk/dpdkTelemetry.cpp‎

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/**
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* \file
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* \brief Implementation of DpdkTelemetry class and helper functions for rings and mempools
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* information retrieval.
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* \author Pavel Siska <[email protected]>
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* \date 2024
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*/
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/*
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* Copyright (C) 2024 CESNET
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*
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* LICENSE TERMS
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name of the Company nor the names of its contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*/
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#include "dpdkTelemetry.hpp"
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#include <stdexcept>
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#include <string>
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#include <rte_eal_memconfig.h>
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#include <rte_mempool.h>
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#include <rte_ring.h>
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#include <rte_tailq.h>
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namespace ipxp {
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static void createRingsInfo(struct rte_ring* ring, void* arg)
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{
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std::string& buffer = *reinterpret_cast<std::string*>(arg);
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unsigned int count;
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unsigned int freeCount;
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unsigned int size;
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unsigned int capacity;
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int isFull;
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int isEmpty;
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count = rte_ring_count(ring);
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freeCount = rte_ring_free_count(ring);
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size = rte_ring_get_size(ring);
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capacity = rte_ring_get_capacity(ring);
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isFull = rte_ring_full(ring);
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isEmpty = rte_ring_empty(ring);
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if (buffer.empty()) {
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buffer += "name ";
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buffer += "flags ";
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buffer += "usedCount ";
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buffer += "freeCount ";
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buffer += "size ";
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buffer += "capacity ";
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buffer += "status";
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buffer += "\n";
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}
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buffer += std::string(ring->name) + " ";
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buffer += std::to_string(ring->flags) + " ";
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buffer += std::to_string(count) + " ";
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buffer += std::to_string(freeCount) + " ";
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buffer += std::to_string(size) + " ";
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buffer += std::to_string(capacity) + " ";
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buffer += isFull == 1 ? "full" : isEmpty == 1 ? "empty" : "inUse";
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buffer += "\n";
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}
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static void ringsWalk(void (*fnc)(struct rte_ring*, void* ctx), void* arg)
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{
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TAILQ_HEAD(rte_ring_list, rte_tailq_entry);
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struct rte_ring_list* rings;
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struct rte_tailq_entry* entry;
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rte_mcfg_tailq_read_lock();
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rings = RTE_TAILQ_LOOKUP(RTE_TAILQ_RING_NAME, rte_ring_list);
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if (rings == nullptr) {
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rte_mcfg_tailq_read_unlock();
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throw std::runtime_error("RTE_TAILQ_LOOKUP(" RTE_TAILQ_RING_NAME ") failed");
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}
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try {
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TAILQ_FOREACH(entry, rings, next)
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{
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fnc((struct rte_ring*) entry->data, arg);
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}
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} catch (...) {
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rte_mcfg_tailq_read_unlock();
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throw;
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}
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rte_mcfg_tailq_read_unlock();
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}
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static void createMempoolsInfo(struct rte_mempool* mempool, std::string& buffer)
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{
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const rte_mempool_ops* ops = rte_mempool_get_ops(mempool->ops_index);
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const unsigned int avail = rte_mempool_avail_count(mempool);
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const unsigned int inUse = rte_mempool_in_use_count(mempool);
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const int isFull = rte_mempool_full(mempool);
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const int isEmpty = rte_mempool_empty(mempool);
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const uint64_t totalSize = static_cast<uint64_t>(mempool->populated_size)
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* static_cast<uint64_t>((mempool->elt_size + mempool->header_size + mempool->trailer_size));
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if (buffer.empty()) {
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buffer += "name ";
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buffer += "socketID ";
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buffer += "flags ";
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buffer += "poolID ";
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buffer += "size ";
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buffer += "cacheSize ";
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buffer += "elementSize ";
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buffer += "headerSize ";
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buffer += "trailerSize ";
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buffer += "totalSize ";
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buffer += "availableCount ";
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buffer += "usedCount ";
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buffer += "status ";
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buffer += "Ops";
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buffer += "\n";
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}
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buffer += std::string(mempool->name) + " ";
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buffer += std::to_string(mempool->socket_id) + " ";
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buffer += std::to_string(mempool->flags) + " ";
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buffer += std::to_string(mempool->pool_id) + " ";
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buffer += std::to_string(mempool->size) + " ";
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buffer += std::to_string(mempool->cache_size) + " ";
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buffer += std::to_string(mempool->elt_size) + " ";
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buffer += std::to_string(mempool->header_size) + " ";
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buffer += std::to_string(mempool->trailer_size) + " ";
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buffer += std::to_string(totalSize) + " ";
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buffer += std::to_string(avail) + " ";
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buffer += std::to_string(inUse) + " ";
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buffer += (isFull == 1 ? "full " : isEmpty == 1 ? "empty " : "inUse ");
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buffer += (ops != nullptr ? std::string(ops->name) : "(none)");
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buffer += "\n";
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}
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static std::string getMempoolsInfo()
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{
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struct Walker {
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std::string buffer;
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std::exception_ptr exc = nullptr;
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void operator()(rte_mempool* pool)
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{
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if (exc != nullptr) {
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return;
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}
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try {
160+
createMempoolsInfo(pool, buffer);
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} catch (...) {
162+
exc = std::current_exception();
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}
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}
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};
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Walker walker;
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rte_mempool_walk(
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[](rte_mempool* pool, void* arg) { (*reinterpret_cast<Walker*>(arg))(pool); },
170+
&walker);
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if (walker.exc != nullptr) {
172+
std::rethrow_exception(walker.exc);
173+
}
174+
return walker.buffer;
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}
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177+
static std::string getRingsInfo()
178+
{
179+
std::string buffer;
180+
ringsWalk(&createRingsInfo, &buffer);
181+
return buffer;
182+
}
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struct AppFsFile {
185+
std::string name;
186+
telemetry::FileOps ops;
187+
};
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189+
static std::vector<AppFsFile> getAppFsFiles()
190+
{
191+
std::vector<AppFsFile> files = {
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{
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.name = "mempools",
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.ops = {
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.read = []() { return getMempoolsInfo(); },
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},
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},
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{
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.name = "rings",
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.ops = {
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.read = []() { return getRingsInfo(); },
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},
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},
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};
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return files;
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}
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DpdkTelemetry::DpdkTelemetry(const std::shared_ptr<telemetry::Directory>& dpdkDir)
209+
{
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for (auto [name, ops] : getAppFsFiles()) {
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auto file = dpdkDir->addFile(name, ops);
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m_holder.add(file);
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}
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}
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} // namespace ct

‎input/dpdk/dpdkTelemetry.hpp‎

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@@ -0,0 +1,56 @@
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/**
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* \file
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* \brief Class for managing DPDK telemetry
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* \author Pavel Siska <[email protected]>
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* \date 2024
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*/
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/*
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* Copyright (C) 2024 CESNET
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*
10+
* LICENSE TERMS
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*
12+
* Redistribution and use in source and binary forms, with or without
13+
* modification, are permitted provided that the following conditions
14+
* are met:
15+
* 1. Redistributions of source code must retain the above copyright
16+
* notice, this list of conditions and the following disclaimer.
17+
* 2. Redistributions in binary form must reproduce the above copyright
18+
* notice, this list of conditions and the following disclaimer in
19+
* the documentation and/or other materials provided with the
20+
* distribution.
21+
* 3. Neither the name of the Company nor the names of its contributors
22+
* may be used to endorse or promote products derived from this
23+
* software without specific prior written permission.
24+
*/
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26+
#pragma once
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28+
#include <memory>
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#include <telemetry.hpp>
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namespace ipxp {
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/**
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* @brief Class for managing DPDK telemetry
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*
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* This class handles the integration of DPDK telemetry data (rings, mempools) into the telemetry
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* directory.
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*/
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class DpdkTelemetry {
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public:
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/**
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* @brief Constructor for DpdkTelemetry
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*
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* Initializes the DPDK telemetry manager and adds files representing DPDK rings and mempools to
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* the provided telemetry directory.
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*
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* @param dpdkDir Pointer to the telemetry directory where files will be added.
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*/
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DpdkTelemetry(const std::shared_ptr<telemetry::Directory>& dpdkDir);
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private:
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telemetry::Holder m_holder;
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};
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} // namespace ct

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