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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "bm_node_stats_reporter.h"
#include "bm_cluster.h"
#include "bm_node_stats.h"
#include <vespa/vespalib/util/lambdatask.h>
#include <vespa/vespalib/util/size_literals.h>
#include <vespa/vespalib/stllike/asciistream.h>
#include <thread>
#include <vespa/log/log.h>
LOG_SETUP(".bmcluster.bm_node_stats_reporter");
using vespalib::makeLambdaTask;
namespace search::bmcluster {
namespace {
bool steady_buckets_stats(const std::optional<BmBucketsStats> buckets)
{
if (!buckets.has_value()) {
return false; // No info available
}
auto& value = buckets.value();
if (!value.get_valid()) {
return false; // Some information still missing
}
return value.get_buckets_pending() == 0u;
}
}
BmNodeStatsReporter::BmNodeStatsReporter(BmCluster &cluster, bool report_merge_stats)
: _cluster(cluster),
_executor(1),
_mutex(),
_cond(),
_change_time(),
_prev_node_stats(),
_pending_report(1u),
_report_merge_stats(report_merge_stats),
_started(false),
_stop(false)
{
}
BmNodeStatsReporter::~BmNodeStatsReporter()
{
if (!_stop) {
stop();
}
}
void
BmNodeStatsReporter::start(std::chrono::milliseconds interval)
{
if (!_started) {
_started = true;
_executor.execute(makeLambdaTask([this, interval]() { run_report_loop(interval); }));
std::unique_lock<std::mutex> guard(_mutex);
_cond.wait(guard, [this]() { return _pending_report == 0u; });
}
}
void
BmNodeStatsReporter::stop()
{
{
std::lock_guard guard(_mutex);
_stop = true;
_cond.notify_all();
}
_executor.sync();
_executor.shutdown();
}
void
BmNodeStatsReporter::report_now()
{
std::unique_lock<std::mutex> guard(_mutex);
++_pending_report;
_cond.notify_all();
_cond.wait(guard, [this]() { return _pending_report == 0u || _stop; });
}
void
BmNodeStatsReporter::report()
{
using Width = vespalib::asciistream::Width;
auto node_stats = _cluster.get_node_stats();
vespalib::asciistream s;
s << "nodes stats ";
BmNodeStats totals;
for (auto &node : node_stats) {
auto& document_db = node.get_document_db_stats();
if (document_db.has_value()) {
s << Width(10) << document_db.value().get_total_docs();
} else {
s << Width(10) << "-";
}
totals += node;
}
if (totals.get_document_db_stats().has_value()) {
s << Width(10) << totals.get_document_db_stats().value().get_total_docs();
} else {
s << Width(10) << "-";
}
auto& total_buckets = totals.get_buckets_stats();
if (total_buckets.has_value()) {
s << Width(8) << total_buckets.value().get_buckets_pending();
if (!total_buckets.value().get_valid()) {
s << "?";
}
} else {
s << Width(8) << "-";
}
vespalib::string ss(s.str());
LOG(info, "%s", ss.c_str());
if (_report_merge_stats) {
s.clear();
vespalib::asciistream ns;
s << "merge stats ";
for (auto& node : node_stats) {
auto &merges = node.get_merge_stats();
if (merges.has_value()) {
ns.clear();
ns << merges.value().get_active() << "/" << merges.value().get_queued();
s << Width(10) << ns.str();
} else {
s << Width(10) << "-";
}
}
ss = s.str();
LOG(info, "%s", ss.c_str());
}
if (!(node_stats == _prev_node_stats) || !steady_buckets_stats(total_buckets)) {
_change_time = std::chrono::steady_clock::now();
_prev_node_stats = node_stats;
}
}
void
BmNodeStatsReporter::run_report_loop(std::chrono::milliseconds interval)
{
std::unique_lock<std::mutex> guard(_mutex);
while (!_stop) {
uint32_t pending_handled = _pending_report;
guard.unlock();
report();
guard.lock();
if (pending_handled != 0u) {
_pending_report -= pending_handled;
_cond.notify_all();
}
if (!_stop && _pending_report == 0u) {
_cond.wait_for(guard, interval);
}
}
}
}
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