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foundationdb/flow/SystemMonitor.cpp

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/*
* SystemMonitor.cpp
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2013-2022 Apple Inc. and the FoundationDB project authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <fstream>
#include "flow/flow.h"
#include "flow/Histogram.h"
#include "flow/Platform.h"
#include "flow/TDMetric.actor.h"
#include "flow/SystemMonitor.h"
#if defined(ALLOC_INSTRUMENTATION) && defined(__linux__)
#include <cxxabi.h>
#endif
SystemMonitorMachineState machineState;
void initializeSystemMonitorMachineState(SystemMonitorMachineState machineState) {
::machineState = machineState;
ASSERT(g_network);
::machineState.monitorStartTime = now();
}
double machineStartTime() {
return ::machineState.monitorStartTime;
}
void systemMonitor() {
static StatisticsState statState = StatisticsState();
#if !DEBUG_DETERMINISM
customSystemMonitor("ProcessMetrics", &statState, true);
#endif
}
SystemStatistics getSystemStatistics() {
static StatisticsState statState = StatisticsState();
const IPAddress ipAddr = machineState.ip.present() ? machineState.ip.get() : IPAddress();
return getSystemStatistics(
machineState.folder.present() ? machineState.folder.get() : "", &ipAddr, &statState.systemState, false);
}
#define TRACEALLOCATOR(size) \
TraceEvent("MemSample") \
.detail("Count", FastAllocator<size>::getApproximateMemoryUnused() / size) \
.detail("TotalSize", FastAllocator<size>::getApproximateMemoryUnused()) \
.detail("SampleCount", 1) \
.detail("Hash", "FastAllocatedUnused" #size) \
.detail("Bt", "na")
#define DETAILALLOCATORMEMUSAGE(size) \
detail("TotalMemory" #size, FastAllocator<size>::getTotalMemory()) \
.detail("ApproximateUnusedMemory" #size, FastAllocator<size>::getApproximateMemoryUnused()) \
.detail("ActiveThreads" #size, FastAllocator<size>::getActiveThreads())
namespace {
#ifdef __linux__
// Converts cgroup key, e.g. nr_periods, to NrPeriods
std::string capitalizeCgroupKey(const std::string& key) {
bool wordStart = true;
std::string result;
result.reserve(key.size());
for (const char ch : key) {
if (std::isalnum(ch)) {
if (wordStart) {
result.push_back(std::toupper(ch));
wordStart = false;
} else {
result.push_back(ch);
}
} else {
// Skip non-alnum characters
wordStart = true;
}
}
return result;
}
#endif // __linux__
} // anonymous namespace
SystemStatistics customSystemMonitor(std::string const& eventName, StatisticsState* statState, bool machineMetrics) {
const IPAddress ipAddr = machineState.ip.present() ? machineState.ip.get() : IPAddress();
SystemStatistics currentStats = getSystemStatistics(
machineState.folder.present() ? machineState.folder.get() : "", &ipAddr, &statState->systemState, true);
NetworkData netData;
netData.init();
if (!g_network->isSimulated() && currentStats.initialized) {
{
TraceEvent(eventName.c_str())
.detail("Elapsed", currentStats.elapsed)
.detail("CPUSeconds", currentStats.processCPUSeconds)
.detail("MainThreadCPUSeconds", currentStats.mainThreadCPUSeconds)
.detail("UptimeSeconds", now() - machineState.monitorStartTime)
.detail("Memory", currentStats.processMemory)
.detail("ResidentMemory", currentStats.processResidentMemory)
.detail("UnusedAllocatedMemory", getTotalUnusedAllocatedMemory())
.detail("MbpsSent",
((netData.bytesSent - statState->networkState.bytesSent) * 8e-6) / currentStats.elapsed)
.detail("MbpsReceived",
((netData.bytesReceived - statState->networkState.bytesReceived) * 8e-6) / currentStats.elapsed)
.detail("DiskTotalBytes", currentStats.processDiskTotalBytes)
.detail("DiskFreeBytes", currentStats.processDiskFreeBytes)
.detail("DiskQueueDepth", currentStats.processDiskQueueDepth)
.detail("DiskIdleSeconds", currentStats.processDiskIdleSeconds)
.detail("DiskReads", currentStats.processDiskRead)
.detail("DiskReadSeconds", currentStats.processDiskReadSeconds)
.detail("DiskWrites", currentStats.processDiskWrite)
.detail("DiskWriteSeconds", currentStats.processDiskWriteSeconds)
.detail("DiskReadsCount", currentStats.processDiskReadCount)
.detail("DiskWritesCount", currentStats.processDiskWriteCount)
.detail("DiskWriteSectors", currentStats.processDiskWriteSectors)
.detail("DiskReadSectors", currentStats.processDiskReadSectors)
.detail("FileWrites", netData.countFileLogicalWrites - statState->networkState.countFileLogicalWrites)
.detail("FileReads", netData.countFileLogicalReads - statState->networkState.countFileLogicalReads)
.detail("CacheReadBytes",
netData.countFileCacheReadBytes - statState->networkState.countFileCacheReadBytes)
.detail("CacheFinds", netData.countFileCacheFinds - statState->networkState.countFileCacheFinds)
.detail("CacheWritesBlocked",
netData.countFileCacheWritesBlocked - statState->networkState.countFileCacheWritesBlocked)
.detail("CacheReadsBlocked",
netData.countFileCacheReadsBlocked - statState->networkState.countFileCacheReadsBlocked)
.detail("CachePageReadsMerged",
netData.countFileCachePageReadsMerged - statState->networkState.countFileCachePageReadsMerged)
.detail("CacheWrites", netData.countFileCacheWrites - statState->networkState.countFileCacheWrites)
.detail("CacheReads", netData.countFileCacheReads - statState->networkState.countFileCacheReads)
.detail("CacheHits", netData.countFilePageCacheHits - statState->networkState.countFilePageCacheHits)
.detail("CacheMisses",
netData.countFilePageCacheMisses - statState->networkState.countFilePageCacheMisses)
.detail("CacheEvictions",
netData.countFilePageCacheEvictions - statState->networkState.countFilePageCacheEvictions)
.detail("DCID", machineState.dcId)
.detail("ZoneID", machineState.zoneId)
.detail("MachineID", machineState.machineId)
.detail("Version", machineState.fdbVersion)
.detail("AIOSubmitCount", netData.countAIOSubmit - statState->networkState.countAIOSubmit)
.detail("AIOCollectCount", netData.countAIOCollect - statState->networkState.countAIOCollect)
.detail("AIOSubmitLag",
(g_network->networkInfo.metrics.secSquaredSubmit -
statState->networkMetricsState.secSquaredSubmit) /
currentStats.elapsed)
.detail("AIODiskStall",
(g_network->networkInfo.metrics.secSquaredDiskStall -
statState->networkMetricsState.secSquaredDiskStall) /
currentStats.elapsed)
.detail("CurrentConnections",
netData.countConnEstablished - netData.countConnClosedWithError -
netData.countConnClosedWithoutError)
.detail("ConnectionsEstablished",
(double)(netData.countConnEstablished - statState->networkState.countConnEstablished) /
currentStats.elapsed)
.detail("ConnectionsClosed",
((netData.countConnClosedWithError - statState->networkState.countConnClosedWithError) +
(netData.countConnClosedWithoutError - statState->networkState.countConnClosedWithoutError)) /
currentStats.elapsed)
.detail("ConnectionErrors",
(netData.countConnClosedWithError - statState->networkState.countConnClosedWithError) /
currentStats.elapsed)
.detail("TLSPolicyFailures",
(netData.countTLSPolicyFailures - statState->networkState.countTLSPolicyFailures) /
currentStats.elapsed)
.trackLatest(eventName);
TraceEvent("MemoryMetrics")
.DETAILALLOCATORMEMUSAGE(16)
.DETAILALLOCATORMEMUSAGE(32)
.DETAILALLOCATORMEMUSAGE(64)
.DETAILALLOCATORMEMUSAGE(96)
.DETAILALLOCATORMEMUSAGE(128)
.DETAILALLOCATORMEMUSAGE(256)
.DETAILALLOCATORMEMUSAGE(512)
.DETAILALLOCATORMEMUSAGE(1024)
.DETAILALLOCATORMEMUSAGE(2048)
.DETAILALLOCATORMEMUSAGE(4096)
.DETAILALLOCATORMEMUSAGE(8192)
.DETAILALLOCATORMEMUSAGE(16384)
.detail("HugeArenaMemory", g_hugeArenaMemory.load())
.detail("DCID", machineState.dcId)
.detail("ZoneID", machineState.zoneId)
.detail("MachineID", machineState.machineId);
uint64_t total_memory = 0;
total_memory += FastAllocator<16>::getTotalMemory();
total_memory += FastAllocator<32>::getTotalMemory();
total_memory += FastAllocator<64>::getTotalMemory();
total_memory += FastAllocator<96>::getTotalMemory();
total_memory += FastAllocator<128>::getTotalMemory();
total_memory += FastAllocator<256>::getTotalMemory();
total_memory += FastAllocator<512>::getTotalMemory();
total_memory += FastAllocator<1024>::getTotalMemory();
total_memory += FastAllocator<2048>::getTotalMemory();
total_memory += FastAllocator<4096>::getTotalMemory();
total_memory += FastAllocator<8192>::getTotalMemory();
total_memory += FastAllocator<16384>::getTotalMemory();
uint64_t unused_memory = 0;
unused_memory += FastAllocator<16>::getApproximateMemoryUnused();
unused_memory += FastAllocator<32>::getApproximateMemoryUnused();
unused_memory += FastAllocator<64>::getApproximateMemoryUnused();
unused_memory += FastAllocator<96>::getApproximateMemoryUnused();
unused_memory += FastAllocator<128>::getApproximateMemoryUnused();
unused_memory += FastAllocator<256>::getApproximateMemoryUnused();
unused_memory += FastAllocator<512>::getApproximateMemoryUnused();
unused_memory += FastAllocator<1024>::getApproximateMemoryUnused();
unused_memory += FastAllocator<2048>::getApproximateMemoryUnused();
unused_memory += FastAllocator<4096>::getApproximateMemoryUnused();
unused_memory += FastAllocator<8192>::getApproximateMemoryUnused();
unused_memory += FastAllocator<16384>::getApproximateMemoryUnused();
if (total_memory > 0) {
TraceEvent("FastAllocMemoryUsage")
.detail("TotalMemory", total_memory)
.detail("UnusedMemory", unused_memory)
.detail("Utilization", format("%f%%", (total_memory - unused_memory) * 100.0 / total_memory));
}
TraceEvent n("NetworkMetrics");
n.detail("Elapsed", currentStats.elapsed)
.detail("CantSleep", netData.countCantSleep - statState->networkState.countCantSleep)
.detail("WontSleep", netData.countWontSleep - statState->networkState.countWontSleep)
.detail("Yields", netData.countYields - statState->networkState.countYields)
.detail("YieldCalls", netData.countYieldCalls - statState->networkState.countYieldCalls)
.detail("YieldCallsTrue", netData.countYieldCallsTrue - statState->networkState.countYieldCallsTrue)
.detail("RunLoopProfilingSignals",
netData.countRunLoopProfilingSignals - statState->networkState.countRunLoopProfilingSignals)
.detail("YieldBigStack", netData.countYieldBigStack - statState->networkState.countYieldBigStack)
.detail("RunLoopIterations", netData.countRunLoop - statState->networkState.countRunLoop)
.detail("TimersExecuted", netData.countTimers - statState->networkState.countTimers)
.detail("TasksExecuted", netData.countTasks - statState->networkState.countTasks)
.detail("ASIOEventsProcessed", netData.countASIOEvents - statState->networkState.countASIOEvents)
.detail("ReadCalls", netData.countReads - statState->networkState.countReads)
.detail("WriteCalls", netData.countWrites - statState->networkState.countWrites)
.detail("ReadProbes", netData.countReadProbes - statState->networkState.countReadProbes)
.detail("WriteProbes", netData.countWriteProbes - statState->networkState.countWriteProbes)
.detail("PacketsRead", netData.countPacketsReceived - statState->networkState.countPacketsReceived)
.detail("PacketsGenerated",
netData.countPacketsGenerated - statState->networkState.countPacketsGenerated)
.detail("WouldBlock", netData.countWouldBlock - statState->networkState.countWouldBlock)
.detail("LaunchTime", netData.countLaunchTime - statState->networkState.countLaunchTime)
.detail("ReactTime", netData.countReactTime - statState->networkState.countReactTime)
.detail("DCID", machineState.dcId)
.detail("ZoneID", machineState.zoneId)
.detail("MachineID", machineState.machineId);
for (int i = 0; i < NetworkMetrics::SLOW_EVENT_BINS; i++) {
if (int c = g_network->networkInfo.metrics.countSlowEvents[i] -
statState->networkMetricsState.countSlowEvents[i]) {
n.detail(format("SlowTask%dM", 1 << i).c_str(), c);
}
}
std::map<TaskPriority, double> loggedDurations;
for (auto& itr : g_network->networkInfo.metrics.activeTrackers) {
if (itr.second.active) {
itr.second.duration += now() - itr.second.windowedTimer;
itr.second.windowedTimer = now();
}
if (itr.second.duration / currentStats.elapsed >= FLOW_KNOBS->MIN_LOGGED_PRIORITY_BUSY_FRACTION) {
loggedDurations[itr.first] = std::min(currentStats.elapsed, itr.second.duration);
}
itr.second.duration = 0;
}
for (auto const& itr : loggedDurations) {
// PriorityBusyX measures the amount of time spent busy at exactly priority X
n.detail(format("PriorityBusy%d", itr.first).c_str(), itr.second);
}
bool firstTracker = true;
for (auto& itr : g_network->networkInfo.metrics.starvationTrackers) {
if (itr.active) {
itr.duration += now() - itr.windowedTimer;
itr.maxDuration = std::max(itr.maxDuration, now() - itr.timer);
itr.windowedTimer = now();
}
// PriorityStarvedBelowX: how much of the elapsed time we were running tasks at a priority at or above X
// PriorityMaxStarvedBelowX: The longest single span of time that you were starved below that priority,
// which could tell you if you are doing work in bursts.
n.detail(format("PriorityStarvedBelow%d", itr.priority).c_str(),
std::min(currentStats.elapsed, itr.duration));
n.detail(format("PriorityMaxStarvedBelow%d", itr.priority).c_str(), itr.maxDuration);
if (firstTracker) {
g_network->networkInfo.metrics.lastRunLoopBusyness =
std::min(currentStats.elapsed, itr.duration) / currentStats.elapsed;
firstTracker = false;
}
itr.duration = 0;
itr.maxDuration = 0;
}
n.trackLatest("NetworkMetrics");
}
if (machineMetrics) {
auto traceEvent = TraceEvent("MachineMetrics");
traceEvent.detail("Elapsed", currentStats.elapsed)
.detail("MbpsSent", currentStats.machineMegabitsSent / currentStats.elapsed)
.detail("MbpsReceived", currentStats.machineMegabitsReceived / currentStats.elapsed)
.detail("OutSegs", currentStats.machineOutSegs)
.detail("RetransSegs", currentStats.machineRetransSegs)
.detail("CPUSeconds", currentStats.machineCPUSeconds)
.detail("TotalMemory", currentStats.machineTotalRAM)
.detail("CommittedMemory", currentStats.machineCommittedRAM)
.detail("AvailableMemory", currentStats.machineAvailableRAM)
.detail("DCID", machineState.dcId)
.detail("ZoneID", machineState.zoneId)
.detail("MachineID", machineState.machineId)
.trackLatest("MachineMetrics");
#ifdef __linux__
for (const auto& [k, v] : linux_os::reportCGroupCpuStat()) {
traceEvent.detail(capitalizeCgroupKey(k).c_str(), v);
}
#endif // __linux__
}
}
#ifdef ALLOC_INSTRUMENTATION
{
static double firstTime = 0.0;
if (firstTime == 0.0)
firstTime = now();
if (now() - firstTime > 10 || g_network->isSimulated()) {
firstTime = now();
std::vector<std::pair<std::string, const char*>> typeNames;
for (auto i = allocInstr.begin(); i != allocInstr.end(); ++i) {
std::string s;
#ifdef __linux__
char* demangled = abi::__cxa_demangle(i->first, nullptr, nullptr, nullptr);
if (demangled) {
s = demangled;
if (StringRef(s).startsWith("(anonymous namespace)::"_sr))
s = s.substr("(anonymous namespace)::"_sr.size());
free(demangled);
} else
s = i->first;
#else
s = i->first;
if (StringRef(s).startsWith("class `anonymous namespace'::"_sr))
s = s.substr("class `anonymous namespace'::"_sr.size());
else if (StringRef(s).startsWith("class "_sr))
s = s.substr("class "_sr.size());
else if (StringRef(s).startsWith("struct "_sr))
s = s.substr("struct "_sr.size());
#endif
typeNames.emplace_back(s, i->first);
}
std::sort(typeNames.begin(), typeNames.end());
for (int i = 0; i < typeNames.size(); i++) {
const char* n = typeNames[i].second;
auto& f = allocInstr[n];
if (f.maxAllocated > 10000)
TraceEvent("AllocInstrument")
.detail("CurrentAlloc", f.allocCount - f.deallocCount)
.detail("Name", typeNames[i].first.c_str());
}
std::unordered_map<uint32_t, BackTraceAccount> traceCounts;
size_t memSampleSize;
memSample_entered = true;
{
ThreadSpinLockHolder holder(memLock);
traceCounts = backTraceLookup;
memSampleSize = memSample.size();
}
memSample_entered = false;
uint64_t totalSize = 0;
uint64_t totalCount = 0;
for (auto i = traceCounts.begin(); i != traceCounts.end(); ++i) {
char buf[1024];
std::vector<void*>* frames = i->second.backTrace;
std::string backTraceStr;
#if defined(_WIN32)
for (int j = 1; j < frames->size(); j++) {
_snprintf(buf, 1024, "%p ", frames->at(j));
backTraceStr += buf;
}
#else
backTraceStr = platform::format_backtrace(&(*frames)[0], frames->size());
#endif
TraceEvent("MemSample")
.detail("Count", (int64_t)i->second.count)
.detail("TotalSize", i->second.totalSize)
.detail("SampleCount", i->second.sampleCount)
.detail("Hash", format("%lld", i->first))
.detail("Bt", backTraceStr);
totalSize += i->second.totalSize;
totalCount += i->second.count;
}
TraceEvent("MemSampleSummary")
.detail("InverseByteSampleRatio", SAMPLE_BYTES)
.detail("MemorySamples", memSampleSize)
.detail("BackTraces", traceCounts.size())
.detail("TotalSize", totalSize)
.detail("TotalCount", totalCount);
TraceEvent("MemSample")
.detail("Count", traceCounts.size())
.detail("TotalSize", traceCounts.size() * ((int)(sizeof(uint32_t) + sizeof(size_t) + sizeof(size_t))))
.detail("SampleCount", traceCounts.size())
.detail("Hash", "backTraces")
.detail("Bt", "na");
TraceEvent("MemSample")
.detail("Count", memSampleSize)
.detail("TotalSize", memSampleSize * ((int)(sizeof(void*) + sizeof(uint32_t) + sizeof(size_t))))
.detail("SampleCount", memSampleSize)
.detail("Hash", "memSamples")
.detail("Bt", "na");
TRACEALLOCATOR(16);
TRACEALLOCATOR(32);
TRACEALLOCATOR(64);
TRACEALLOCATOR(96);
TRACEALLOCATOR(128);
TRACEALLOCATOR(256);
TRACEALLOCATOR(512);
TRACEALLOCATOR(1024);
TRACEALLOCATOR(2048);
TRACEALLOCATOR(4096);
TRACEALLOCATOR(8192);
}
}
#endif
statState->networkMetricsState = g_network->networkInfo.metrics;
statState->networkState = netData;
return currentStats;
}
Future<Void> startMemoryUsageMonitor(uint64_t memLimit) {
if (memLimit == 0) {
return Void();
}
auto checkMemoryUsage = [=]() {
if (getResidentMemoryUsage() > memLimit) {
platform::outOfMemory();
}
};
return recurring(checkMemoryUsage, FLOW_KNOBS->MEMORY_USAGE_CHECK_INTERVAL);
}
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