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/** |
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* This file is part of the CernVM File System. |
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*/ |
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#include "telemetry_aggregator.h" |
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#include <errno.h> |
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#include <poll.h> |
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#include <unistd.h> |
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#include "util/exception.h" |
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#include "util/logging.h" |
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#include "util/platform.h" |
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#include "util/pointer.h" |
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#include "util/posix.h" |
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#include "telemetry_aggregator_influx.h" |
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namespace perf { |
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TelemetryAggregator* TelemetryAggregator::Create(Statistics* statistics, |
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int send_rate, |
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OptionsManager *options_mgr, |
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const std::string &fqrn, |
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const TelemetrySelector type) { |
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UniquePtr<TelemetryAggregatorInflux> telemetryInflux; |
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UniquePtr<TelemetryAggregator> *telemetry; |
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switch (type) { |
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case kTelemetryInflux: |
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telemetryInflux = new TelemetryAggregatorInflux(statistics, send_rate, |
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options_mgr, fqrn); |
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telemetry = reinterpret_cast<UniquePtr<TelemetryAggregator>*> |
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(&telemetryInflux); |
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break; |
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default: |
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LogCvmfs(kLogTelemetry, kLogDebug, |
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"No implementation available for given telemetry class."); |
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return NULL; |
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break; |
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} |
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if (telemetry->weak_ref()->is_zombie_) { |
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LogCvmfs(kLogTelemetry, kLogDebug | kLogSyslogErr, |
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"Requested telemetry will NOT be used. " |
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"It was not constructed correctly."); |
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return NULL; |
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} |
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LogCvmfs(kLogTelemetry, kLogDebug, "TelemetryAggregator created."); |
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return telemetry->Release(); |
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} |
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TelemetryAggregator::~TelemetryAggregator() { |
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if (pipe_terminate_[1] >= 0) { |
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char t = 'T'; |
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WritePipe(pipe_terminate_[1], &t, 1); |
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pthread_join(thread_telemetry_, NULL); |
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ClosePipe(pipe_terminate_); |
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} |
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} |
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void TelemetryAggregator::Spawn() { |
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assert(pipe_terminate_[0] == -1); |
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assert(send_rate_sec_ > 0); |
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MakePipe(pipe_terminate_); |
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int retval = pthread_create(&thread_telemetry_, NULL, MainTelemetry, this); |
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assert(retval == 0); |
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LogCvmfs(kLogTelemetry, kLogDebug, "Spawning of telemetry thread."); |
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} |
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void *TelemetryAggregator::MainTelemetry(void *data) { |
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TelemetryAggregator *telemetry = reinterpret_cast<TelemetryAggregator*>(data); |
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Statistics *statistics = telemetry->statistics_; |
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struct pollfd watch_term; |
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watch_term.fd = telemetry->pipe_terminate_[0]; |
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watch_term.events = POLLIN | POLLPRI; |
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int timeout_ms = telemetry->send_rate_sec_ * 1000; |
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uint64_t deadline_sec = platform_monotonic_time() |
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+ telemetry->send_rate_sec_; |
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while (true) { |
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// sleep and check if end - blocking wait for "send_rate_sec_" seconds |
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watch_term.revents = 0; |
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int retval = poll(&watch_term, 1, timeout_ms); |
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if (retval < 0) { |
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if (errno == EINTR) { // external interrupt occurred - no error for us |
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if (timeout_ms >= 0) { |
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uint64_t now = platform_monotonic_time(); |
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timeout_ms = (now > deadline_sec) ? 0 : |
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static_cast<int>((deadline_sec - now) * 1000); |
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} |
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continue; |
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} |
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PANIC(kLogSyslogErr | kLogDebug, "Error in telemetry thread. " |
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"Poll returned %d", retval); |
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} |
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// reset timeout and deadline of poll |
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timeout_ms = telemetry->send_rate_sec_ * 1000; |
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deadline_sec = platform_monotonic_time() + telemetry->send_rate_sec_; |
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// aggregate + send stuff |
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if (retval == 0) { |
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statistics->SnapshotCounters(&telemetry->counters_, |
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&telemetry->timestamp_); |
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telemetry->PushMetrics(); |
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continue; |
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} |
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// stop thread due to poll event |
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assert(watch_term.revents != 0); |
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char c = 0; |
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ReadPipe(telemetry->pipe_terminate_[0], &c, 1); |
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assert(c == 'T'); |
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break; |
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} |
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LogCvmfs(kLogTelemetry, kLogDebug, "Stopping telemetry thread"); |
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return NULL; |
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} |
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} // namespace perf |
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