filter-name

    Specifies the name of the filter to define. The filter name can
    be used on a later CANCEL FILTER command. The filter name can
    consist of letters, digits, underscores, and dollar signs. It
    cannot start with a digit. If a filter of the same name already
    exists, the old filter is canceled before the new one is defined.

 filter-spec

    Specifies a filter restriction. Each filter restriction specifies
    some criterion that a data point must satisfy. If a data point
    satisfies any one restriction for a given filter, it passes the
    whole filter.

    The following are vector filter restrictions:

    Vector Restriction          Explanation

    VLENGTH=number              Filters the VLENGTH domain to show
                                only the Vector Length Register
                                values of a specified length.
    VMASK=number                Filters the VMASK domain to show the
                                Vector Mask Register values with the
                                specified number of cells enabled.
    VOPCODE=vector-opcode       Filters the vector instruction
                                opcode to include only the specified
                                opcodes. You must supply mnemonics
                                of the opcodes to be included in the
                                plot.
    VOPERATIONS=n               Restricts views based on the number
                                of actual operations that are
                                performed by vector instructions.
    VREGISTER=vector-reg        Filters the vector registers to show
                                only specific registers.
    VSTRIDE=number              Filters the vector stride length
                                values to include only the specified
                                values.