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A Linux boot log showing the usage of TSC as system clocksource. The Time Stamp Counter (TSC) is a 64-bit register present on all x86 processors since the Pentium. It counts the number of CPU cycles since its reset. The instruction RDTSC returns the TSC in EDX:EAX. In x86-64 mode, RDTSC also clears the upper 32 bits of RAX and RDX. Its opcode ...
Read 64-bit Time Stamp Counter (TSC) into EDX:EAX. [m] [a] In early processors, the TSC was a cycle counter, incrementing by 1 for each clock cycle (which could cause its rate to vary on processors that could change clock speed at runtime) – in later processors, it increments at a fixed rate that doesn't necessarily match the CPU clock speed. [n]
Technology Service Corporation, a US engineering company Terrorist Screening Center , a division of the National Security Branch of the US Federal Bureau of Investigation The Shopping Channel , a Canadian television network
The documentation of Red Hat MRG version 2 states that TSC is the preferred clock source due to its much lower overhead, but it uses HPET as a fallback. A benchmark in that environment for 10 million event counts found that TSC took about 0.6 seconds, HPET took slightly over 12 seconds, and ACPI Power Management Timer took around 24 seconds. [6]
[2] These manuals are also generally available as online auto repair manuals. Factory service manuals have seen the implementation of digitalization over the years. Factory service manuals are generally the only source of information for manufacturers labor time guides. These are times that are generated through labor time studies that are used ...
The term "timestamp" derives from rubber stamps used in offices to stamp the current date, and sometimes time, in ink on paper documents, to record when the document was received. Common examples of this type of timestamp are a postmark on a letter or the "in" and "out" times on a time card .
tsc: Time Stamp Counter: cr8_legacy: CR8 in 32-bit mode 4 5 msr: Model-specific registers: abm/lzcnt: Advanced bit manipulation (LZCNT and POPCNT) 5 6 pae: Physical Address Extension: sse4a: SSE4a: 6 7 mce: Machine Check Exception: misalignsse: Misaligned SSE mode 7 8 cx8: CMPXCHG8B (compare-and-swap) instruction 3dnowprefetch: PREFETCH and ...
Shepherdson & Sturgis (1963) observe that "the proof of this universality [of digital computers to Turing machines] ... seems to have been first written down by Hermes, who showed in [7--their reference number] how an idealized computer could be programmed to duplicate the behavior of any Turing machine", and: "Kaphengst's approach is interesting in that it gives a direct proof of the ...