row {
    values: {
        double_value: 100.0
    }
    dimension {
        null_value {}
    }
    dimension {
        string_value: "ProcessSliceNoThread"
    }
}
row {
    values: {
        double_value: 301.0
    }
    dimension {
        string_value: "Thread"
    }
    dimension {
        string_value: "ThreadSlice1"
    }
}
row {
    values: {
        double_value: 199.0
    }
    dimension {
        string_value: "Thread"
    }
    dimension {
        string_value: "ThreadSlice2"
    }
}
specs {
    id: "max_duration"
    value: "max_dur"
    query {
        simple_slices {
            slice_name_glob: "*"
        }
        group_by {
            column_names: "slice_name"
            column_names: "thread_name"
            aggregates {
                column_name: "dur"
                op: COUNT
                result_column_name: "count_dur"
            }
            aggregates {
                column_name: "dur"
                op: MAX
                result_column_name: "max_dur"
            }
            aggregates {
                column_name: "dur"
                op: SUM
                result_column_name: "sum_dur"
            }
        }
    }
    dimensions_specs {
        name: "thread_name"
        type: STRING
    }
    dimensions_specs {
        name: "slice_name"
        type: STRING
    }
}