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even simpler data storage

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The data for each curve is now stored as one big string that has ALL the data;
this string is easily sent to gnuplot at once. There's also a bit of attached
meta-data to allow streaming --xlen culling to work
This commit is contained in:
Dima Kogan 2013-09-20 19:29:45 -07:00
parent 386c5f6d41
commit d76f163be4
1 changed files with 99 additions and 66 deletions
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149
bin/feedgnuplot
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@ -18,8 +18,15 @@ my %options;
interpretCommandline();
# list containing the plot data. Each element is a hashref of parameters.
# $curve->{data} is a list of the points. Each point is a listref representing
# the tuple
# $curve->{datastring} is a string of all the data in this curve that can be
# sent directly to gnuplot. $curve->{datastring_meta} is a hashref {domain =>
# ..., offset_start => ...}. offset_start represents a position in the
# datastring where this particular data element begins. As the data is culled
# with --xlen, the offsets are preserved by using $curve->{datastring_offset} to
# represent the offset IN THE ORIGINAL STRING of the current start of the
# datastring
my @curves = ();
# list mapping curve names to their indices in the @curves list
@ -28,12 +35,6 @@ my %curveIndices = ();
# now start the data acquisition and plotting threads
my $dataQueue;
# latest domain variable present in our data
my $latestX;
# The domain of the current point
my @domain;
# Whether any new data has arrived since the last replot
my $haveNewData;
@ -109,7 +110,7 @@ sub interpretCommandline
$options{histogram} = [];
GetOptions(\%options, 'stream:s', 'domain!', 'dataid!', '3d!', 'colormap!', 'lines!', 'points!',
'circles', 'legend=s{2}', 'autolegend!', 'xlabel=s', 'ylabel=s', 'y2label=s', 'zlabel=s',
'title=s', 'xlen=f', 'ymin=f', 'ymax=f', 'xmin=f', 'xmax=f', 'y2min=f', 'y2max=f',
'title=s', 'xlen=f', 'ymin=f', 'ymax=f', 'xmin=s', 'xmax=s', 'y2min=f', 'y2max=f',
'zmin=f', 'zmax=f', 'y2=s@', 'curvestyle=s{2}', 'curvestyleall=s', 'extracmds=s@',
'square!', 'square_xy!', 'hardcopy=s', 'maxcurves=i', 'monotonic!', 'timefmt=s',
'histogram=s@', 'binwidth=f', 'histstyle=s',
@ -274,7 +275,7 @@ sub interpretCommandline
exit -1;
}
if($options{stream} && $options{xlen} &&
if($options{stream} && defined $options{xlen} &&
( defined $options{xmin} || defined $options{xmax}))
{
print STDERR "With --stream and --xlen the X bounds are set, so neither --xmin nor --xmax make sense\n";
@ -334,6 +335,26 @@ sub plotUpdateThread
$dataQueue->enqueue(undef);
}
sub sendRangeCommand
{
my ($name, $min, $max) = @_;
return unless defined $min || defined $max;
if( defined $min )
{ $min = "\"$min\""; }
else
{ $min = ''; }
if( defined $max )
{ $max = "\"$max\""; }
else
{ $max = ''; }
my $cmd = "set $name [$min:$max]\n";
print PIPE $cmd;
}
sub mainThread
{
my $valuesPerPoint = 1;
@ -388,22 +409,13 @@ sub mainThread
# If a bound isn't given I want to set it to the empty string, so I can communicate it simply to
# gnuplot
$options{xmin} = '' unless defined $options{xmin};
$options{xmax} = '' unless defined $options{xmax};
$options{ymin} = '' unless defined $options{ymin};
$options{ymax} = '' unless defined $options{ymax};
$options{y2min} = '' unless defined $options{y2min};
$options{y2max} = '' unless defined $options{y2max};
$options{zmin} = '' unless defined $options{zmin};
$options{zmax} = '' unless defined $options{zmax};
print PIPE "set xtics\n";
if($options{y2})
{
print PIPE "set ytics nomirror\n";
print PIPE "set y2tics\n";
# if any of the ranges are given, set the range
print PIPE "set y2range [$options{y2min}:$options{y2max}]\n" if length( $options{y2min} . $options{y2max} );
sendRangeCommand( "y2range", $options{y2min}, $options{y2max} );
}
# set up plotting style
@ -416,9 +428,10 @@ sub mainThread
}
# if any of the ranges are given, set the range
print PIPE "set xrange [$options{xmin}:$options{xmax}]\n" if length( $options{xmin} . $options{xmax} );
print PIPE "set yrange [$options{ymin}:$options{ymax}]\n" if length( $options{ymin} . $options{ymax} );
print PIPE "set zrange [$options{zmin}:$options{zmax}]\n" if length( $options{zmin} . $options{zmax} );
sendRangeCommand( "xrange", $options{xmin}, $options{xmax} );
sendRangeCommand( "yrange", $options{ymin}, $options{ymax} );
sendRangeCommand( "zrange", $options{zmin}, $options{zmax} );
print PIPE "set style data $style\n" if $style;
print PIPE "set grid\n";
@ -448,7 +461,7 @@ sub mainThread
if($options{colormap})
{
print PIPE "set cbrange [$options{zmin}:$options{zmax}]\n" if length( $options{zmin} . $options{zmax} );
sendRangeCommand( "cbrange", $options{zmin}, $options{zmax} );
}
# For the specified values, set the legend entries to 'title "blah blah"'
@ -523,6 +536,15 @@ sub mainThread
$pointRE .= '(' . join('\s+', ($numRE) x $valuesPerPoint) . ')';
$pointRE = qr/$pointRE/;
# latest domain variable present in our data
my $latestX;
# The domain of the current point
my @domain;
# I should be using the // operator, but I'd like to be compatible with perl 5.8
while( $_ = (defined $dataQueue ? $dataQueue->dequeue() : <>))
{
@ -534,7 +556,7 @@ sub mainThread
elsif( $options{stream} && /^replot/o )
{
# /timertick/ determines if the timer was the source of the replot
replot( /timertick/ );
replot( $domain[0], /timertick/ );
}
elsif(! /^replot/o)
{
@ -564,7 +586,7 @@ sub mainThread
# the x-coordinate of the new point is in the past, so I wipe out
# all the data and start anew. Before I wipe the old data, I
# replot the old data
replot();
replot( $domain[0] );
clearCurves();
$latestX = undef;
}
@ -595,7 +617,7 @@ sub mainThread
else {$id++; }
pushPoint(getCurve($id),
[@domain, $2]);
"@domain $2\n", $domain[0]);
}
}
}
@ -623,38 +645,40 @@ sub mainThread
sub pruneOldData
{
my ($oldestx) = @_;
my ($x, $xlen) = @_;
my $oldestx = $x - $xlen;
foreach my $curve (@curves)
{
# get the data listref. Each reference is a listref representing the tuple
my $data = $curve->{data};
if( @$data )
{
my $firstInWindow = first {$data->[$_][0] >= $oldestx} 0..$#$data;
next unless $curve->{datastring};
my $meta = $curve->{datastring_meta};
my $firstInWindow = first {$meta->[$_]{domain} >= $oldestx} 0..$#$meta;
if ( !defined $firstInWindow )
{
# everything is too old. Clear out all the data
$curve->{data} = [];
$curve->{datastring} = '';
$curve->{datastring_meta} = [];
$curve->{datastring_offset} = 0;
}
elsif ( $firstInWindow >= 2 )
{
# clear out everything that's too old, except for one point. This point
# will be off the plot, but if we're plotting lines there will be a
# connecting line to it. Some of the line will be visible
splice( @$data, 0, $firstInWindow-1 );
}
substr( $curve->{datastring}, 0,
$meta->[$firstInWindow-1]{offset_start} - $curve->{datastring_offset},
'' );
$curve->{datastring_offset} = $meta->[$firstInWindow-1]{offset_start};
}
}
}
sub plotStoredData
{
my ($xmin, $xmax) = @_;
print PIPE "set xrange [$xmin:$xmax]\n" if defined $xmin;
# get the options for those curves that have any data
my @nonemptyCurves = grep { @{$_->{data}} } @curves;
# get the options for those curves that havse any data
my @nonemptyCurves = grep { $_->{datastring} } @curves;
my @extraopts = map {$_->{options}} @nonemptyCurves;
my $body = join(', ' , map({ "'-' $_" } @extraopts) );
@ -663,12 +687,7 @@ sub plotStoredData
foreach my $curve (@nonemptyCurves)
{
# send each point to gnuplot. Ignore the first "point" since it's the
# curve options
for my $elem (@{$curve->{data}})
{
print PIPE "@$elem\n";
}
print PIPE $curve->{datastring};
print PIPE "e\n";
}
}
@ -723,7 +742,10 @@ sub getCurve
if( !exists $curveIndices{$id} )
{
push @curves, {extraoptions => ' ', data => []}; # push a curve with no data and no options
push @curves, {extraoptions => ' ',
datastring => '',
datastring_meta => [],
datastring_offset => 0}; # push a curve with no data and no options
$curveIndices{$id} = $#curves;
updateCurveOptions($curves[$#curves], $id);
@ -763,7 +785,11 @@ sub setCurveAsHistogram
sub clearCurves
{
foreach my $curve(@curves)
{ $curve->{data} = []; }
{
$curve->{datastring} = '';
$curve->{datastring_meta} = [];
$curve->{datastring_offset} = 0;
}
}
sub replot
@ -789,7 +815,7 @@ sub replot
# }
my ($replot_is_from_timer) = @_;
my ($domain0, $replot_is_from_timer) = @_;
my $now = [gettimeofday];
@ -804,14 +830,17 @@ sub replot
# if enough time has elapsed since the last replot, it's ok to replot
tv_interval ( $last_replot_time, $now ) > 0.8*$options{stream} )
{
# tests passed; do replot
if ( $options{xlen} )
# ok, then. We really need to replot
if ( defined $options{xlen} )
{
pruneOldData($domain[0] - $options{xlen});
plotStoredData($domain[0] - $options{xlen}, $domain[0]);
# we have an --xlen, so we need to clean out the old data
pruneOldData( $domain0, $options{xlen} );
my ($xmin, $xmax) = ($domain0 - $options{xlen}, $domain0);
sendRangeCommand( "xrange", $xmin, $xmax );
}
else
{ plotStoredData(); }
plotStoredData();
# update replot state
@ -823,8 +852,12 @@ sub replot
# function to add a point to the plot. Assumes that the curve indexed by $idx already exists
sub pushPoint
{
my ($curve, $xy) = @_;
push @{$curve->{data}}, $xy;
my ($curve, $datastring, $domain0) = @_;
push @{$curve->{datastring_meta}}, { offset_start => length( $curve->{datastring} ) + $curve->{datastring_offset},
domain => $domain0 };
$curve->{datastring} .= $datastring;
$haveNewData = 1;
}