diff options
Diffstat (limited to 'indra')
| -rw-r--r-- | indra/llcommon/llsys.cpp | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/indra/llcommon/llsys.cpp b/indra/llcommon/llsys.cpp index 015a24cf23..92fdf4f327 100644 --- a/indra/llcommon/llsys.cpp +++ b/indra/llcommon/llsys.cpp @@ -37,6 +37,9 @@ #include "llprocessor.h" #include "llerrorcontrol.h" +#include "llevents.h" +#include "lltimer.h" +#include <boost/bind.hpp> #if LL_WINDOWS # define WIN32_LEAN_AND_MEAN @@ -71,6 +74,10 @@ extern int errno; static const S32 CPUINFO_BUFFER_SIZE = 16383; LLCPUInfo gSysCPU; +// Don't log memory info any more often than this. It also serves as our +// framerate sample size. +static const F32 MEM_INFO_THROTTLE = 20; + #if LL_WINDOWS #ifndef DLLVERSIONINFO typedef struct _DllVersionInfo @@ -877,6 +884,105 @@ std::ostream& operator<<(std::ostream& s, const LLMemoryInfo& info) return s; } +class FrameWatcher +{ +public: + FrameWatcher(): + // Hooking onto the "mainloop" event pump gets us one call per frame. + mConnection(LLEventPumps::instance() + .obtain("mainloop") + .listen("FrameWatcher", boost::bind(&FrameWatcher::tick, this, _1))), + // Initializing mSampleStart to an invalid timestamp alerts us to skip + // trying to compute framerate on the first call. + mSampleStart(-1), + // Initializing mSampleEnd to 0 ensures that we treat the first call + // as the completion of a sample window. + mSampleEnd(0), + mFrames(0), + // Initializing to F32_MAX means that the first real frame will become + // the slowest ever, which sounds like a good idea. + mSlowest(F32_MAX), + mDesc("startup") + {} + + bool tick(const LLSD&) + { + F32 timestamp(mTimer.getElapsedTimeF32()); + + // Count this frame in the interval just completed. + ++mFrames; + + // Have we finished a sample window yet? + if (timestamp < mSampleEnd) + { + // no, just keep waiting + return false; + } + + // Set up for next sample window. Capture values for previous frame in + // local variables and reset data members. + U32 frames(mFrames); + F32 sampleStart(mSampleStart); + // No frames yet in next window + mFrames = 0; + // which starts right now + mSampleStart = timestamp; + // and ends MEM_INFO_THROTTLE seconds in the future + mSampleEnd = mSampleStart + MEM_INFO_THROTTLE; + + // On the very first call, that's all we can do, no framerate + // computation is possible. + if (sampleStart < 0) + { + return false; + } + + // How long did this actually take? As framerate slows, the duration + // of the frame we just finished could push us WELL beyond our desired + // sample window size. + F32 elapsed(timestamp - sampleStart); + F32 framerate(frames/elapsed); + + // We're especially interested in memory as framerate drops. Only log + // when framerate is lower than ever before. (Should always be true + // for the end of the very first sample window.) + if (framerate >= mSlowest) + { + return false; + } + // Congratulations, we've hit a new low. :-P + mSlowest = framerate; + + LL_INFOS("FrameWatcher") << mDesc << " framerate " + << std::fixed << std::setprecision(1) << framerate << '\n' + << LLMemoryInfo() << LL_ENDL; + mDesc = "new lowest"; + + return false; + } + +private: + // Storing the connection in an LLTempBoundListener ensures it will be + // disconnected when we're destroyed. + LLTempBoundListener mConnection; + // Track elapsed time + LLTimer mTimer; + // Some of what you see here is in fact redundant with functionality you + // can get from LLTimer. Unfortunately the LLTimer API is missing the + // feature we need: has at least the stated interval elapsed, and if so, + // exactly how long has passed? So we have to do it by hand, sigh. + // Time at start, end of sample window + F32 mSampleStart, mSampleEnd; + // Frames this sample window + U32 mFrames; + // Slowest framerate EVAR + F32 mSlowest; + // Description of next notable framerate + std::string mDesc; +}; + +static FrameWatcher sFrameWatcher; + BOOL gunzip_file(const std::string& srcfile, const std::string& dstfile) { std::string tmpfile; |