new()

data()

Returns a hash representation of the iozone data.

Override of Test::Parser's default parse_line() routine to make it able to parse iozone output.

plot_2d()

Plot the data using Gnuplot.

commented_out

FIXME: This will eventually be supported through the Test::Presenter method to_plot(). When this method has been written, most of this can be thrown out

sub plot_2d { my $self = shift;

    my %gopts;
    $gopts{'defaults'} = {
        'title' => 'iozone Performance',
#        'yrange' => '[0:]',
        'x-axis label' => 'Record size (kb)',
        'y-axis label' => 'File size (kb)',
#        'extra_opts' => 'set grid xtics ytics',
#        'output type' => "$self->{format}",
        'output file' => "$self->{outdir}/iozone-",
    };

    my %data_opts = ( 'title' => '',
                      'style' => 'lines',
                      'type'  => 'columns' ,
                      );

    # TODO:  We're just taking a snapshot at 32 byte record lengths
    #        We should either take this as an input, or provide a
    #        3D plotting capability
    my $reclen = 32;
    my @x_columns;
    my %y_columns;
    foreach my $d (@{$self->{data}}) {
        next unless ($d->{'reclen'} == $reclen);
        push @x_columns, $d->{'KB'};
        foreach my $key (keys %{$d}) {
            next unless (defined $d->{$key});
            push @{$y_columns{$key}}, $d->{$key};
        }
    }

    print "Number of X points (should be about 10-20):",
    scalar @x_columns, "\n";

    #
    # Generate charts.
    #
    foreach my $h (IOZONE_HEADERS) {
        # Skip x-columns
        next if ($h =~ /^kb$/i
                 or $h =~ /^reclen$/i);

        %{$gopts{$h}} = %{$gopts{'defaults'}};
        $gopts{$h}->{'title'} .= " - $h";
        $gopts{$h}->{'output file'} .=  "$h.$self->{format}";

        if (defined $y_columns{$h} ) {
            print "plotting $h\n";
            gnuplot( $gopts{$h}, [\%data_opts, \@x_columns, $y_columns{$h}] );
        }
    }
}

commented_out

FIXME: This will eventually be supported through the Test::Presenter method to_plot(). When this method has been written, most of this can be thrown out

# This is a static function for plotting multiple runs # with a date or software version as the X-Axis sub historical_plot { my $runs = shift || return undef; my $file_sizes = shift || return undef; my $reclens = shift || return undef;

    my $format = $runs->[0]->{format};
    my $outdir = $runs->[0]->{outdir};

    # Graph options
    my %gopts_defaults = 
        (
         'title' => 'Historical iozone Performance',
         'x-axis label' => 'Time',
         'y-axis label' => 'KB/sec',
         'yrange'       => '[0:]',
         'xdata'        => 'time',
         'timefmt'      => '%b:%d:%H:%M:%S:%Y',
         'format'       => ['y', '%.0f'],

         'output file'  => "$outdir/iozone-",
#         'extra_opts'   => 'set grid',
         );

    # Data-set default options
    my %data_opts = 
        ( 
          'title' => '',
          'style' => 'lines',
          'type'  => 'matrix',
           );

    if (@{$runs} < 1) {
        warn "No data to graph\n";
        return undef;
    }
    
    if (@{$file_sizes} == 1) {
        # Put file_size into title
        $gopts_defaults{'title'} = 
            join(" - ", $gopts_defaults{'title'}, "$file_sizes->[0] kb files");
    }

    if (@{$reclens} == 1) {
        # Put reclen into title
        $gopts_defaults{'title'} =
            join(" - ", $gopts_defaults{'title'}, "$reclens->[0] kb records");
    }

    # Transform the list of runs into data matrices indexed by column name
    my %data = _runs_to_data($runs, $file_sizes, $reclens);
    if (values %data < 1) {
        warn "Error:  Could not transform data\n";
        return undef;
    }

    # Create a plot for each of the iozone fields with data defined
    foreach my $h (IOZONE_HEADERS) {
        # Skip x-columns
        next if ($h =~ /^kb$/i
                 or $h =~ /^reclen$/i);

        my %gopts = %gopts_defaults;
        $gopts{'output file'} .=  "$h.$format";

        if ( $data{$h} ) {
            my @data_sets;
            foreach my $file_size (@{$file_sizes}) {
                foreach my $reclen (@{$reclens}) {
                    my %opts = %data_opts;
                    if (@{$file_sizes} > 1) {
                        $opts{'title'} .= " - $file_size kb files";
                    }
                    if (@{$reclens} > 1) {
                        $opts{'title'} .= " - $reclen kb records";
                    }
                    push @data_sets, [\%opts, $data{$h}->{$file_size}->{$reclen}];
                }
            }
            print "plotting $h\n";
            gnuplot(\%gopts, @data_sets );
        }
    }

}

# This is a static function to compare several runs sub comparison_plot { my $runs = shift || return undef; my $names = shift || return undef;

    my $num_runs = @{$runs};
    my $num_names = @{$names};

    if ($num_runs != $num_names) {
        warn "$num_runs runs and $num_names provided.\n";
        warn "Error:  Must specify a name for each run\n";
        return undef;
    }

    if ($num_runs < 2) {
        warn "Error:  Need at least 2 runs to do comparison plot\n";
        return undef;
    }

    my $format = $runs->[0]->{format};
    my $outdir = $runs->[0]->{outdir};

    # Graph options
    my %gopts = 
        (
         'title'        => 'iozone Performance Comparison',
         'x-axis label' => 'Record size (kb)',
         'y-axis label' => 'File size (kb)',
         'output file'  => "$outdir/iozone-",
         );

    # Transform the list of runs into data matrixes indexed by column name
    my %data;
    my $reclen = 32;
    foreach my $run (@{$runs}) {
        my $name = shift @{$names};
        my %data_opts = (
                      'title' => $name,
                      'style' => 'lines',
                      'type'  => 'columns',
                      );

        # Extract the data out of hashes and put into columns
        my @x_column;
        my %y_columns;
        foreach my $d ($run->{data}) {
            next unless ($d->{'reclen'} == $reclen);
            push @x_column, $d->{'KB'};

            foreach my $key (keys %{$d}) {
                push @{$y_columns{$key}}, $d->{$key};
            }
        }

        # Put the columns
        foreach my $key (keys %y_columns) {
            push @{$data{$key}}, [\%data_opts, \@x_column, $y_columns{$key}];
        }
    }        

    # Create a plot for each of the iozone fields with data defined
    foreach my $h (IOZONE_HEADERS) {
        # Set the global options
        %{$gopts{$h}} = %{$gopts{'defaults'}};
        $gopts{$h}->{'title'} .= " - $h";
        $gopts{$h}->{'output file'} .=  "$h.$format";

        if (defined $gopts{$h} && defined $data{$h}) {
            print "plotting $h\n";
            gnuplot($gopts{$h}, @{$data{$h}});
        }
    }

}