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/**
* @file lltrace.cpp
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2012, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#include "linden_common.h"
#include "lltrace.h"
#include "lltracesampler.h"
namespace LLTrace
{
static MasterThreadTrace* gMasterThreadTrace = NULL;
void init()
{
gMasterThreadTrace = new MasterThreadTrace();
}
void cleanup()
{
delete gMasterThreadTrace;
gMasterThreadTrace = NULL;
}
LLThreadLocalPointer<ThreadTrace>& get_thread_trace()
{
static LLThreadLocalPointer<ThreadTrace> s_trace_data;
return s_trace_data;
}
BlockTimer::Recorder::StackEntry BlockTimer::sCurRecorder;
MasterThreadTrace& getMasterThreadTrace()
{
llassert(gMasterThreadTrace != NULL);
return *gMasterThreadTrace;
}
///////////////////////////////////////////////////////////////////////
// MasterThreadTrace
///////////////////////////////////////////////////////////////////////
ThreadTrace::ThreadTrace()
{
get_thread_trace() = this;
mPrimarySampler.makePrimary();
mTotalSampler.start();
}
ThreadTrace::ThreadTrace( const ThreadTrace& other )
: mPrimarySampler(other.mPrimarySampler),
mTotalSampler(other.mTotalSampler)
{
get_thread_trace() = this;
mPrimarySampler.makePrimary();
mTotalSampler.start();
}
ThreadTrace::~ThreadTrace()
{
get_thread_trace() = NULL;
}
//TODO: remove this and use llviewerstats sampler
Sampler* ThreadTrace::getPrimarySampler()
{
return &mPrimarySampler;
}
void ThreadTrace::activate( Sampler* sampler )
{
for (std::list<Sampler*>::iterator it = mActiveSamplers.begin(), end_it = mActiveSamplers.end();
it != end_it;
++it)
{
(*it)->mMeasurements.write()->mergeSamples(*mPrimarySampler.mMeasurements);
}
mPrimarySampler.mMeasurements.write()->reset();
sampler->initDeltas(mPrimarySampler);
mActiveSamplers.push_front(sampler);
}
//TODO: consider merging results down the list to one past the buffered item.
// this would require 2 buffers per sampler, to separate current total from running total
void ThreadTrace::deactivate( Sampler* sampler )
{
sampler->mergeDeltas(mPrimarySampler);
// TODO: replace with intrusive list
std::list<Sampler*>::iterator found_it = std::find(mActiveSamplers.begin(), mActiveSamplers.end(), sampler);
if (found_it != mActiveSamplers.end())
{
mActiveSamplers.erase(found_it);
}
}
///////////////////////////////////////////////////////////////////////
// SlaveThreadTrace
///////////////////////////////////////////////////////////////////////
SlaveThreadTrace::SlaveThreadTrace()
: ThreadTrace(getMasterThreadTrace())
{
getMasterThreadTrace().addSlaveThread(this);
}
SlaveThreadTrace::~SlaveThreadTrace()
{
getMasterThreadTrace().removeSlaveThread(this);
}
void SlaveThreadTrace::pushToMaster()
{
mTotalSampler.stop();
{
LLMutexLock(getMasterThreadTrace().getSlaveListMutex());
mSharedData.copyFrom(mTotalSampler);
}
mTotalSampler.start();
}
void SlaveThreadTrace::SharedData::copyFrom( const Sampler& source )
{
LLMutexLock lock(&mSamplerMutex);
mSampler.mergeSamples(source);
}
void SlaveThreadTrace::SharedData::copyTo( Sampler& sink )
{
LLMutexLock lock(&mSamplerMutex);
sink.mergeSamples(mSampler);
}
///////////////////////////////////////////////////////////////////////
// MasterThreadTrace
///////////////////////////////////////////////////////////////////////
void MasterThreadTrace::pullFromSlaveThreads()
{
LLMutexLock lock(&mSlaveListMutex);
for (slave_thread_trace_list_t::iterator it = mSlaveThreadTraces.begin(), end_it = mSlaveThreadTraces.end();
it != end_it;
++it)
{
(*it)->mSlaveTrace->mSharedData.copyTo((*it)->mSamplerStorage);
}
}
void MasterThreadTrace::addSlaveThread( class SlaveThreadTrace* child )
{
LLMutexLock lock(&mSlaveListMutex);
mSlaveThreadTraces.push_back(new SlaveThreadTraceProxy(child));
}
void MasterThreadTrace::removeSlaveThread( class SlaveThreadTrace* child )
{
LLMutexLock lock(&mSlaveListMutex);
for (slave_thread_trace_list_t::iterator it = mSlaveThreadTraces.begin(), end_it = mSlaveThreadTraces.end();
it != end_it;
++it)
{
if ((*it)->mSlaveTrace == child)
{
mSlaveThreadTraces.erase(it);
break;
}
}
}
void MasterThreadTrace::pushToMaster()
{}
MasterThreadTrace::MasterThreadTrace()
{}
///////////////////////////////////////////////////////////////////////
// MasterThreadTrace::SlaveThreadTraceProxy
///////////////////////////////////////////////////////////////////////
MasterThreadTrace::SlaveThreadTraceProxy::SlaveThreadTraceProxy( class SlaveThreadTrace* trace)
: mSlaveTrace(trace)
{}
}
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