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c++ Programming Glossary: tscHPET's frequency vs CPU frequency for measuring time http://stackoverflow.com/questions/12971110/hpets-frequency-vs-cpu-frequency-for-measuring-time case . Windows chooses to built the timekeeping around the TSC with preference when a constant invariant TSC is available... around the TSC with preference when a constant invariant TSC is available. 3.33 GHz 1024 3.25 MHz. share improve this answer..
What happens when QueryPerformanceCounter is called? http://stackoverflow.com/questions/1723629/what-happens-when-queryperformancecounter-is-called syncronization logic if necessary. It attempts to use the TSC register but for multiprocessor systems this register is not..
Microsecond resolution timestamps on Windows http://stackoverflow.com/questions/2414359/microsecond-resolution-timestamps-on-windows always run at CPU speed. In fact it might try to avoid RDTSC especially on multi processor multi core systems it will use.. ACPI detection fails and the system resorts to using the TSC . It is a resort that should not happen. If it happens on older.. system does not have a proper timer apart from the Pentium TSC you might in fact consider messing with thread affinity even..
C++ Timer function to provide time in nano seconds http://stackoverflow.com/questions/275004/c-timer-function-to-provide-time-in-nano-seconds 7 can determine if the processor s have an invariant TSC and falls back to an external timer if they don't. http performancebydesign.blogspot.com..
http://stackoverflow.com/questions/6432669/variance-in-rdtsc-overhead in RDTSC overhead I'm constructing a micro benchmark to measure performance.. of the measurement code itself. I'm measuring with RDTSC and I'm using the following code to find the measurement overhead.. 10.04 g 4.4.3 Core 2 Duo E6600 this has constant rate TSC. SpeedStep has been turned off processor is set to performance..
QueryPerformanceCounter Status? http://stackoverflow.com/questions/7287663/queryperformancecounter-status a hardware fix compensation for this as well as having the TSC correctly synced between cores so the problems with RDTSC based.. TSC correctly synced between cores so the problems with RDTSC based timers are eliminated. The hot fix can be gotten from..
Windows 7 timing functions - How to use GetSystemTimeAdjustment correctly? http://stackoverflow.com/questions/7685762/windows-7-timing-functions-how-to-use-getsystemtimeadjustment-correctly when HPET High Precision Event Timer or constant invariant TSC are supported may return 156 001 for ActualResolution . This.. VISTA or higher with HPET and or constant invariant TSC on your system. Implementation If you want to catch the time..
Bitwise operation on signed integer http://stackoverflow.com/questions/11644362/bitwise-operation-on-signed-integer
Difference between rdtscp, rdtsc : memory and cpuid / rdtsc? http://stackoverflow.com/questions/12631856/difference-between-rdtscp-rdtsc-memory-and-cpuid-rdtsc between rdtscp rdtsc memory and cpuid rdtsc Assume we're trying to use the.. between rdtscp rdtsc memory and cpuid rdtsc Assume we're trying to use the tsc for.. between rdtscp rdtsc memory and cpuid rdtsc Assume we're trying to use the tsc for performance monitoring..
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