EScore Files

========================================================================
  File I/O Couting (IOC) Library

  Copyright (C) Information Technology Center, The University of Tokyo
  2009, All rights reserved.

  written by  Hitachi, Ltd.
========================================================================

Introduction
============

The IOC library hooks file I/O functions of the GNU C Library (glibc)
and supports survey of file I/O timing, amount, and so on.

Table of Contests
=================

1. Installation

2. Execution


1. Installation
===============

1.0 Get and unpack the glibc sources [recommend]
------------------------------------------------

The glibc usually hides the internal file I/O functions.  You must
rebuild the glibc so that the IOC library may hook internal file I/O
functions.

We recommend you check the version of glibc installed in your system
and get a glibc of the same version.  For example, if you have unpacked
the IOC library sources in `/usr/local/src/libioc-1.0.0', unpack the
glibc sources in `/usr/local/src/glibc'.

1.1 Configure and build the IOC library and utilities
-----------------------------------------------------

The IOC library cannot be compiled in the source directory.  You must
build it in a separate build directory.  For example, if you have
unpacked the IOC library sources in `/usr/local/src/libioc-1.0.0',
create a directory `/usr/local/src/libioc-1.0.0-build' to put the
object files in.

From your object directory, run the script `configure' located at the
top level of the source tree with the option `--disable-hidden-plt'.
In the scenario above, you'd type

        $ ../libioc-1.0.0/configure --disable-hidden-plt

The following list describes the available other options for
`configure':

`--prefix=DIRECTORY'
        Install the library and utilities in subdirectories of
        `DIRECTORY'.  The default is to install in `/usr/local'.

`--with-glibc=DIRECTORY'
        Specify directory of the glibc sources.  If you have got and
        unpacked the glibc sources, you use this option and specify
        that diractory.

2. Execution
============

2.1 Run a program
-----------------

It is necessary to use the script `ioc_run' to link the IOC Library with
your program at run time.  In the scenario avobe, you'd type

        $ /usr/local/bin/ioc_run PROGRAM

The following list describes the available options for `ioc_run':

`-file FILE'
        Specify the name of the file that the IOC library outputs.  The
        default is to `ioc_out'.

`-file-mode MODE'
        Specify the unit of the file that the IOC library outputs.  The
        default is to `job'.

`-mask MASK'
        Specify the mask of file I/O functions that the IOC library
        hooks.

`-table-size SIZE'
        Specify the size (byte) of the table by which the IOC library
        stores file I/O informations.  The default is to `1073741824'.

2.2 Check a result
------------------

It is necessary to use the script `ioc_check_file' to check the file
that the IOC library outputs.  In the scenario avobe, you'd type

        $ /usr/local/bin/ioc_check_file ioc_out

And you'd get some data files `IOC_*.csv' and an archive file
`IOC.tar.gz'.

The following list describes the available options for `ioc_check_file':

`-tsize SIZE'
        Specify the unit (msec) of the time step.

2.2.1 Use the Microsoft-Excel
-----------------------------

It is necessary to  unpack the archive file `IOC.tar.gz' to get the
Excel file `IOC.xls'.  In addition, you must open `IOC.xls' and input
the path of the folder where you unpacked `IOC.tar.gz' to the cell `B2'.

And you'd click the button `Setup All' in the sheet `TimingSheet' and
check file I/O informations of your program.

2.2.2 Use the Gnuplot
---------------------

It is necessary to use the script `ioc_plot_timing' and
`ioc_plot_file_access' to check the file file I/O informations of your
program.  In the scenario avobe, you'd type

        $ /usr/local/bin/ioc_plot_timing

In addition, you'd type

        $ /usr/local/bin/ioc_plot_file_access -fname FILE

The following list describes the available options for
`ioc_plot_timing':

`-tsize SIZE'
        Specify the unit (msec) of the time step.

And the following list describes the available options for
`ioc_plot_file_access':

`-fname FILE'
        Specify the name of the file that your program accesses.