Track uptime. Update local fee schedule based on load manager.

src/cpp/ripple/Application.cpp

@@ -52,6 +52,7 @@ Application::Application() :
 	mJobQueue.setThreadCount();
 	mSweepTimer.expires_from_now(boost::posix_time::seconds(10));
 	mSweepTimer.async_wait(boost::bind(&Application::sweep, this));
+	mLoadMgr.init();
 }
 
 extern const char *RpcDBInit[], *TxnDBInit[], *LedgerDBInit[], *WalletDBInit[], *HashNodeDBInit[], *NetNodeDBInit[];

src/cpp/ripple/JobQueue.cpp

@@ -181,6 +181,16 @@ Json::Value JobQueue::getJson(int)
 	return ret;
 }
 
+int JobQueue::isOverloaded()
+{
+	int count = 0;
+	boost::mutex::scoped_lock sl(mJobLock);
+	for (int i = 0; i < NUM_JOB_TYPES; ++i)
+		if (mJobLoads[i].isOver())
+			++count;
+	return count;
+}
+
 void JobQueue::shutdown()
 { // shut down the job queue without completing pending jobs
 	cLog(lsINFO) << "Job queue shutting down";

src/cpp/ripple/JobQueue.h

@@ -108,6 +108,7 @@ public:
 	LoadEvent::autoptr getLoadEventAP(JobType t)
 	{ return LoadEvent::autoptr(new LoadEvent(mJobLoads[t], true, 1)); }
 
+	int isOverloaded();
 	Json::Value getJson(int c = 0);
 };
 

src/cpp/ripple/LoadManager.cpp

@@ -1,15 +1,18 @@
 #include "LoadManager.h"
 
 #include <boost/test/unit_test.hpp>
+#include <boost/thread.hpp>
+#include <boost/date_time/posix_time/posix_time.hpp>
 
 #include "Log.h"
 #include "Config.h"
+#include "Application.h"
 
 SETUP_LOG();
 
 LoadManager::LoadManager(int creditRate, int creditLimit, int debitWarn, int debitLimit) :
 		mCreditRate(creditRate), mCreditLimit(creditLimit), mDebitWarn(debitWarn), mDebitLimit(debitLimit),
-		mCosts(LT_MAX)
+		mShutdown(false), mUptime(0), mCosts(LT_MAX)
 {
 	addLoadCost(LoadCost(LT_InvalidRequest,		10,		LC_CPU | LC_Network));
 	addLoadCost(LoadCost(LT_RequestNoReply,		1,		LC_CPU | LC_Disk));
@@ -25,6 +28,30 @@ LoadManager::LoadManager(int creditRate, int creditLimit, int debitWarn, int deb
 	addLoadCost(LoadCost(LT_CheapQuery,			1,		LC_CPU));
 }
 
+void LoadManager::init()
+{
+	boost::thread(boost::bind(&LoadManager::threadEntry, this)).detach();
+}
+
+LoadManager::~LoadManager()
+{
+	{
+		boost::mutex::scoped_lock sl(mLock);
+		mShutdown = true;
+	}
+
+	do
+	{
+		boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+		{
+			boost::mutex::scoped_lock sl(mLock);
+			if (!mShutdown)
+				return;
+		}
+	}
+	while (1);
+}
+
 
 int LoadManager::getCreditRate() const
 {
@@ -239,6 +266,45 @@ Json::Value LoadFeeTrack::getJson(uint64 baseFee, uint32 referenceFeeUnits)
 	return j;
 }
 
+int LoadManager::getUptime()
+{
+	boost::mutex::scoped_lock sl(mLock);
+	return mUptime;
+}
+
+void LoadManager::threadEntry()
+{
+	boost::posix_time::ptime t = boost::posix_time::microsec_clock::universal_time();
+	while (1)
+	{
+		{
+			boost::mutex::scoped_lock sl(mLock);
+			if (mShutdown)
+			{
+				mShutdown = false;
+				return;
+			}
+			++mUptime;
+		}
+
+		if (theApp->getJobQueue().isOverloaded())
+			theApp->getFeeTrack().raiseLocalFee();
+		else
+			theApp->getFeeTrack().lowerLocalFee();
+
+		t += boost::posix_time::seconds(1);
+		boost::posix_time::time_duration when = t - boost::posix_time::microsec_clock::universal_time();
+
+		if (when.is_negative())
+		{
+			cLog(lsWARNING) << "Backwards time jump";
+			t = boost::posix_time::microsec_clock::universal_time();
+		}
+		else
+			boost::this_thread::sleep(when);
+	}
+}
+
 BOOST_AUTO_TEST_SUITE(LoadManager_test)
 
 BOOST_AUTO_TEST_CASE(LoadFeeTrack_test)

src/cpp/ripple/LoadManager.h

@@ -86,6 +86,9 @@ protected:
 	int mDebitWarn;				// when a source drops below this, we warn
 	int mDebitLimit;			// when a source drops below this, we cut it off (should be negative)
 
+	bool mShutdown;
+	int mUptime;
+
 	mutable boost::mutex mLock;
 
 	void canonicalize(LoadSource&, const time_t now) const;
@@ -94,9 +97,13 @@ protected:
 
 	void addLoadCost(const LoadCost& c) { mCosts[static_cast<int>(c.mType)] = c; }
 
+	void threadEntry();
+
 public:
 
 	LoadManager(int creditRate = 10, int creditLimit = 50, int debitWarn = -50, int debitLimit = -100);
+	~LoadManager();
+	void init();
 
 	int getCreditRate() const;
 	int getCreditLimit() const;
@@ -113,6 +120,7 @@ public:
 	bool adjust(LoadSource&, LoadType l) const;
 
 	int getCost(LoadType t)		{ return mCosts[static_cast<int>(t)].mCost; }
+	int getUptime();
 };
 
 class LoadFeeTrack

src/cpp/ripple/LoadMonitor.cpp

@@ -69,6 +69,18 @@ void LoadMonitor::addCountAndLatency(int counts, int latency)
 		mLatencyMSPeak = lp;
 }
 
+bool LoadMonitor::isOver()
+{
+	boost::mutex::scoped_lock sl(mLock);
+
+	update();
+
+	if (mLatencyEvents == 0)
+		return 0;
+
+	return isOverTarget(mLatencyMSAvg / (mLatencyEvents * 4), mLatencyMSPeak / (mLatencyEvents * 4));
+}
+
 void LoadMonitor::getCountAndLatency(uint64& count, uint64& latencyAvg, uint64& latencyPeak, bool& isOver)
 {
 	boost::mutex::scoped_lock sl(mLock);
@@ -89,3 +101,5 @@ void LoadMonitor::getCountAndLatency(uint64& count, uint64& latencyAvg, uint64&
 	}
 	isOver = isOverTarget(latencyAvg, latencyPeak);
 }
+
+// vim:ts=4

src/cpp/ripple/LoadMonitor.h

@@ -35,8 +35,8 @@ public:
 
 	void setTargetLatency(uint64 avg, uint64 pk)
 	{
-		mTargetLatencyAvg = avg * 4;
-		mTargetLatencyPk = pk * 4;
+		mTargetLatencyAvg  = avg;
+		mTargetLatencyPk = pk;
 	}
 
 	bool isOverTarget(uint64 avg, uint64 peak)
@@ -46,6 +46,7 @@ public:
 	}
 
 	void getCountAndLatency(uint64& count, uint64& latencyAvg, uint64& latencyPeak, bool& isOver);
+	bool isOver();
 };
 
 class LoadEvent

src/cpp/ripple/RPCHandler.cpp

@@ -1786,6 +1786,21 @@ Json::Value RPCHandler::doLogin(Json::Value jvRequest)
 }
 #endif
 
+static void textTime(std::string& text, int& seconds, const char *unitName, int unitVal)
+{
+	int i = seconds / unitVal;
+	if (i == 0)
+		return;
+	seconds -= unitVal * i;
+	if (!text.empty())
+		text += ", ";
+	text += boost::lexical_cast<std::string>(i);
+	text += " ";
+	text += unitName;
+	if (i > 1)
+		text += "s";
+}
+
 // {
 //   min_count: <number>  // optional, defaults to 10
 // }
@@ -1807,6 +1822,15 @@ Json::Value RPCHandler::doGetCounts(Json::Value jvRequest)
 	if (dbKB > 0)
 		ret["dbKB"] = dbKB;
 
+	std::string uptime;
+	int s = theApp->getLoadManager().getUptime();
+	textTime(uptime, s, "year", 365*24*60*60);
+	textTime(uptime, s, "day", 24*60*60);
+	textTime(uptime, s, "hour", 24*60);
+	textTime(uptime, s, "minute", 60);
+	textTime(uptime, s, "second", 1);
+	ret["uptime"] = uptime;
+
 	return ret;
 }