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Annotation of researchv10dc/man/adm/man2/profil.2, revision 1.1

1.1     ! root        1: .TH PROFIL 2
        !             2: .CT 2 debug_tune
        !             3: .SH NAME
        !             4: profil \(mi execution time profile
        !             5: .SH SYNOPSIS
        !             6: .nf
        !             7: .B void profil(buff, bufsiz, offset, scale)
        !             8: .B unsigned short *buff;
        !             9: .B int bufsiz, offset;
        !            10: .B unsigned scale;
        !            11: .fi
        !            12: .SH DESCRIPTION
        !            13: .I Buff
        !            14: points to an area of core whose length in bytes is given by
        !            15: .IR bufsiz .
        !            16: After this call, the user's program counter
        !            17: is examined each clock tick;
        !            18: .I offset
        !            19: is subtracted from it, and the result multiplied by
        !            20: .IR scale ,
        !            21: divided by 65536
        !            22: and then rounded up to a multiple of two.
        !            23: If the resulting number (\f2n\fP) is less than
        !            24: .IR bufsiz ,
        !            25: then
        !            26: .B buff[n/2]
        !            27: is incremented.
        !            28: .PP
        !            29: Profiling is turned off by giving a
        !            30: .I scale
        !            31: of 0.
        !            32: It is rendered
        !            33: ineffective by giving a
        !            34: .I bufsiz
        !            35: of 0.
        !            36: Profiling is turned off when an
        !            37: .I exec
        !            38: is executed, but remains on in child and parent both
        !            39: after a
        !            40: .IR fork .
        !            41: Profiling is turned off if an update in
        !            42: .I buff
        !            43: would cause a memory fault.
        !            44: .SH "SEE ALSO"
        !            45: .IR prof (1),
        !            46: .IR monitor (3)
        !            47: .SH BUGS
        !            48: Because of the rounding up,
        !            49: single byte instructions
        !            50: cannot be exactly profiled.

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