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  2. List of GNU Core Utilities commands - Wikipedia

    en.wikipedia.org/wiki/List_of_GNU_Core_Utilities...

    id: Prints real or effective UID and GID: link: Creates a link to a file logname: Print the user's login name nice: Modifies scheduling priority nohup: Allows a command to continue running after logging out nproc: Queries the number of (active) processors pathchk: Checks whether file names are valid or portable pinky: A lightweight version of ...

  3. CPUID - Wikipedia

    en.wikipedia.org/wiki/CPUID

    For example, on Intel Crystalwell CPUs, executing CPUID with EAX=4 and ECX=4 will cause the processor to return the following size information for its level-4 cache in EBX and ECX: EBX=03C0F03F and ECX=00001FFF - this should be taken to mean that this cache has a cache line size of 64 bytes (EBX[11:0]+1), has 16 cache lines per tag (EBX[21:12 ...

  4. List of performance analysis tools - Wikipedia

    en.wikipedia.org/wiki/List_of_performance...

    Can open Linux LTTng and Perf Cpu Sampling traces; as well as Android Perfetto traces via plugins Proprietary freeware with Linux / Android Open Source plugins RotateRight Zoom Linux, macOS, Viewer Only for Windows Supports most compiled languages on ARM and x86 processors. Graphical and command-line statistical (event-based) profiler. VisualSim

  5. x86 instruction listings - Wikipedia

    en.wikipedia.org/wiki/X86_instruction_listings

    Write one cache line back to memory without invalidating the cache line. 3 Skylake-X, Zen 2, Tiger Lake, Tremont: RDPID Read processor core ID. RDPID r32: F3 0F C7 /7: Read processor core ID into register. [v] 3 [ah] Goldmont Plus, Zen 2, Ice Lake, LuJiaZui [ag] MOVDIRI Move to memory as Direct Store. MOVDIRI m32,r32 MOVDIRI m64,r64: NP 0F 38 ...

  6. List of POSIX commands - Wikipedia

    en.wikipedia.org/wiki/List_of_POSIX_commands

    Cut out selected fields of each line of a file System III cxref: C programming Optional (XSI) Generate a C-language program cross-reference table System V date: Misc Mandatory Display the date and time Version 1 AT&T UNIX dd: Filesystem Mandatory Convert and copy a file Version 5 AT&T UNIX delta: SCCS Optional (XSI) Make a delta (change) to an ...

  7. Bash (Unix shell) - Wikipedia

    en.wikipedia.org/wiki/Bash_(Unix_shell)

    "It is also the first to have a command processor implemented as ordinary user code – an idea later used in the Unix shell."Multics Wikipage It was called exec_com or ec. [20] [21] 1971 () "Ken Thompson (of Bell Labs) developed the first shell for UNIX called the 'V6 shell'." Its sole purpose was to serve as an interactive shell.

  8. nice (Unix) - Wikipedia

    en.wikipedia.org/wiki/Nice_(Unix)

    nice is a program found on Unix and Unix-like operating systems such as Linux. It directly maps to a kernel call of the same name. nice is used to invoke a utility or shell script with a particular CPU priority, thus giving the process more or less CPU time than other processes. A niceness of -20 is the lowest niceness, or highest priority.

  9. FLAGS register - Wikipedia

    en.wikipedia.org/wiki/FLAGS_register

    The FLAGS register is the status register that contains the current state of an x86 CPU.The size and meanings of the flag bits are architecture dependent. It usually reflects the result of arithmetic operations as well as information about restrictions placed on the CPU operation at the current time.