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Home/ Questions/Q 8770699
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Editorial Team
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Editorial Team
Asked: June 13, 20262026-06-13T17:36:30+00:00 2026-06-13T17:36:30+00:00

In GNU/Linux, is it possible to determine the time required to start a program?

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In GNU/Linux, is it possible to determine the time required to start a program? Where “start” is defined as having executed load_elf_binary() (or some other applicable function). In particular I want to write a program that can do this. I.e. a program, given another program as input, and then determine that time, with as high accuracy as possible.

Edit: Forgot to specify the hardware is x86-64.

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  1. Editorial Team
    Editorial Team
    2026-06-13T17:36:31+00:00Added an answer on June 13, 2026 at 5:36 pm

    NASA uses 386 and older hardware because they are deterministic, caches and super-scalar technologies make 486s and newer processors non-deterministic. It is thus non-trivial to determine the startup time.

    Articles of interest:

    • http://science.slashdot.org/story/10/09/27/1333204/the-ancient-computers-powering-the-space-race
    • http://drum.lib.umd.edu/bitstream/1903/891/2/CS-TR-3768.pdf
    • http://pages.cs.wisc.edu/~markhill/racey.html
    • http://en.wikipedia.org/wiki/Nondeterministic_algorithm
    • http://homes.cs.washington.edu/~tbergan/papers/wodet11-hammer.pdf
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