rdtsc - Search

Switch to Bing in English

Copilot

Your everyday AI companion

About 7,480 results

Read Time-Stamp Counter
The rdtsc (Read Time-Stamp Counter) instruction is used to determine how many CPU ticks took place since the processor was reset. Loads the current value of the processor's time-stamp counter into the EDX:EAX registers It is commonly used as a timing defense (anti-debugging technique).
X86-assembly/Instructions/rdtsc - aldeid
www.aldeid.com/wiki/X86-assembly/Instructions/rdtsc
Was this helpful?
People also ask
What does RDTSC do?
Microsoft Specific Generates the rdtsc instruction, which returns the processor time stamp. The processor time stamp records the number of clock cycles since the last reset. A 64-bit unsigned integer representing a tick count. Header file <intrin.h> This routine is available only as an intrinsic.
__rdtsc | Microsoft Learn
learn.microsoft.com
Is RDTSC a serializing instruction?
The RDTSC instruction is not a serializing instruction. It does not necessarily wait until all previous instructions have been executed before reading the counter. Similarly, subsequent instructions may begin execution before the read operation is performed. The following items may guide software seeking to order executions of RDTSC:
RDTSC — Read Time-Stamp Counter - felixcloutier.com
felixcloutier.com
What is RDTSCP instruction?
The RDTSCP instruction is a variant of RDTSC that features partial serialization of the instruction stream, but should not be considered as serializing. Intel processor families increment the time-stamp counter differently:
Time Stamp Counter - Wikipedia
en.wikipedia.org
What does RDTSC opcode 0F 31 mean?
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 is 0F 31.
Time Stamp Counter - Wikipedia
en.wikipedia.org
Feedback
Qiita
https://qiita.com/warai_otoco/items/5ee6a3dc9f3e92910440
RDTSC命令を使い、いまどきのCPUでクロックを測定してみる
WebJul 30, 2022 · rdtsc. クロックスピードチェック. Last updated at 2022-07-30 Posted at 2022-02-11. 「最近のRDTSC命令は実際のCPUクロックを数えていない」という記事を見つけて、本当にそんなことがあるのかと気になったので、確認してみることにした。 …
Tags:
Linux
RDTSC命令
Explore further
rdtsc(Read Time Stamp Counter)のクラス化 | 豆知識 - …
soundengine.jp
rdtsc命令でクロック計測 - mtaneda’s blog
mtaneda.hatenablog.com
rdtsc関数によるクロックサイクル数計測 #C - Qiita
qiita.com
マルウェアによるRDTSC命令の利用 #Security - Qiita
qiita.com
c - rdtsc命令で特定のプログラムの実行時間を ...
ja.stackoverflow.com
Recommended to you based on what's popular • Feedback
Wikipedia
https://en.wikipedia.org/wiki/Time_Stamp_Counter
Time Stamp Counter - Wikipedia
Overview
Use
Implementation in various processors
Operating system use
Use in exploiting cache side-channel attacks
Other architectures
See also
External links
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 is 0F 31. Pentium competitors such as the Cyrix 6x86 did not always have a TSC and may consider RDTSC a…
Wikipedia · Text under CC-BY-SA license
- Estimated Reading Time: 7 mins
Explore further
linux - Time Stamp Counter - Stack Overflow
stackoverflow.com
A bit detailed info on Intel Time Stamp Counter (TSC)
forums.guru3d.com
Recommended to you based on what's popular • Feedback
Félix Cloutier
https://www.felixcloutier.com/x86/rdtsc
RDTSC — Read Time-Stamp Counter - felixcloutier.com
WebRDTSC — Read Time-Stamp Counter. Instruction Operand Encoding ¶. Description ¶. Reads the current value of the processor’s time-stamp counter (a 64-bit MSR) into the EDX:EAX registers. The EDX register is loaded with the high-order 32 bits of the MSR …
Explore further
RDTSC() for measuring latency of an operation - Intel …
community.intel.com
RDTSC use in C: - UNIX
unix.com
Recommended to you based on what's popular • Feedback
Github
https://github.com/xuwd1/rdtsc-notes
GitHub - xuwd1/rdtsc-notes: notes and example codes on ...
WebIntel's guide on benchmarking code with rdtsc (p) rdtscp reference. rdtsc reference. First glance. For measuring the execution time of work, the ideal case would be like the following: leading_code () startcycle = rdtsc () measured_code () endcycle = rdtsc () …
c++ rdtsc
rdtsc windows
rdtsc virtualization
rdtsc to milliseconds
linux rdtsc
rdtsc to nanoseconds
rdtsc instruction
More
People also search for
c++ rdtsc
rdtsc virtualization
linux rdtsc
rdtsc windows
rdtsc to milliseconds
rdtsc to nanoseconds
Related searches for rdtsc
Pagination
- 1
- 2
- 3
- 4
- 5
- Next

RDTSC Instruction
Can a time-stamp counter be read with a RDTSC instruction?(When in real-address mode, the RDTSC instruction is always enabled.) The time-stamp counter can also be read with the RDMSR instruction, when executing at privilege level 0. The RDTSC instruction is not a serializing instruction. Thus, it does not necessarily wait until all previous instructions have been executed before reading the counter.
RDTSC | x86 Instruction Set Reference
tizee.github.io/x86_ref_book_web/instruction/rdtsc.html
How do I know if a RDTSCP instruction is supported?To determine hardware support for this instruction, call the __cpuid intrinsic with InfoType=0x80000001 and check bit 27 of CPUInfo (EDX). This bit is 1 if the instruction is supported, and 0 otherwise. If you run code that uses the intrinsic on hardware that doesn't support the rdtscp instruction, the results are unpredictable.
__rdtscp | Microsoft Learn
learn.microsoft.com/en-us/cpp/intrinsics/rdtscp?view=msvc
Explore More
Performance measurements with RDTSC - strchr.comUsing RDTSC instruction. The RDTSC instruction returns a 64-bit time stamp counter (TSC), which is increased on every clock cycle. It's the most precise counter available on x86 architecture. MSVC++ 2005 compiler supports a handy __rdtsc intrinsic that returns the result in 64-bit variable.
https://www.strchr.com/performance_measurements_with_rdtsc
gcc - Assembler instruction: rdtsc - Stack Overflowrdtsc returns timestamp in a pair of 32-bit registers (EDX and EAX). First snippet combines them into single 64-bit register (RDX) which is mapped to msr variable. Second snippet is the wrong one.
https://stackoverflow.com/questions/34810392/assembler-instruction-rdtsc
See more results

By using this site you agree to the use of cookies for analytics, personalized content, and ads.Learn more about third party cookies|Microsoft Privacy Policy