can one produce a data flow graph

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dpoznan
Posts: 34
Joined: Wed Jun 30, 2021 10:50 pm

can one produce a data flow graph

Post by dpoznan » Tue Oct 05, 2021 11:58 pm

Since the cfg file really defines a data flow graph with connected plugins, is there a tool that will display the graph. This would be very useful in debugging cfg files and in understanding the examples.

I am used to coding for FPGAs where compute is done via data flow rather than instruction execution.

Hope there is a tool in openmha.

Dan..

tobiasherzke
Posts: 79
Joined: Mon Jun 24, 2019 12:51 pm

Re: can one produce a data flow graph

Post by tobiasherzke » Thu Nov 18, 2021 8:43 am

openMHA does not have a flow graph visualizer. The closest that I could find is a rudimentary tool that scans running MHA instances, recognizes some special strings in the responses,, and produces .dot files which can then be processed by graphviz. E.g. this is the graph generated for openMHA example 18, altconfig.
example18altconfig.png
example18altconfig.png (149.13 KiB) Viewed 12 times
It is not on our roadmap to maintain or extend this tool. It consists of ~190 lines of Octave code, I'm inserting it here:

Code: Select all

function sGraph = scan_graph( mha, dotname, showall )
% scan_graph - scan hierarchical structure of a MHA instance
%
% sGraph = scan_graph( mha, dotname, showall )
  if nargin < 1
    mha = [];
  end
  if nargin < 2
    dotname = 'temp.dot';
  end
  if nargin < 3
    showall = false;
  end
  mha = mha_ensure_mhahandle( mha );
  sGraph = struct;
  sGraph.nodes = cell(0,2);
  sGraph.leaves = cell(0,2);
  sGraph.connections = cell(0,2);
  sGraph.pconnections = cell(0,2);
  sGraph.aconnections = cell(0,2);
  sGraph.chains = cell(0,1);
  sGraph = scan_sub( mha, '', sGraph, '', struct('id','') );
  write_dot_file( sGraph, dotname, showall );
  system(sprintf('dot -Tpng %s > %s.png',dotname,dotname(1:end-4)));
  
  
function sGraph = scan_sub( mha, prefix, sGraph, parent, parentinfo )
  info = mha_getinfo(mha,prefix);
  info.fullpath = prefix;
  info.cfgname = prefix;
  info.cfgname(1:max(find(info.cfgname=='.'))) = [];
  info.dll = '';
  if strcmp(info.cfgname,'identity')
    parent
    parentinfo
  end
  if isfield(parentinfo,'chain_names')
    idx = strmatch(info.cfgname,parentinfo.chain_names);
    if ~isempty(idx)
      info.dll = parentinfo.chain_dlls{idx};
    end
  end
  if strcmp(info.id,'mhachain')
    algo_names = mha_get(mha,[prefix,'.algos']);
    algo_dlls = algo_names;
    longalgo_names = algo_names;
    for k=1:numel(algo_names)
      if ~isempty(find(algo_names{k}==':'))
	algo_names{k}(1:max(find(algo_names{k}==':'))) = [];
      end
      if ~isempty(find(algo_dlls{k}==':'))
	algo_dlls{k}(max(find(algo_dlls{k}==':')):end) = [];
      end
      info.chain_names = algo_names;
      info.chain_dlls = algo_dlls;
      longalgo_names{k} = mhapath2dot([prefix,'.',algo_names{k}]);
    end
    for k=2:numel(algo_names)
      sGraph.aconnections(end+1,:) = ...
	  {[longalgo_names{k-1},''],[longalgo_names{k},'']};
    end
    sGraph.aconnections(end+1,:) = ...
    	{[mhapath2dot(prefix),':sw'],[longalgo_names{1},':w']};
    sGraph.aconnections(end+1,:) = ...
    	{[longalgo_names{end},':e'],[mhapath2dot(prefix),':se']};
    sGraph.chains{end+1} = longalgo_names;
  end
  if strcmp(info.id,'split')
    info.plugin = true;
    algo_names = mha_get(mha,[prefix,'.algos']);
    algo_dlls = algo_names;
    longalgo_names = algo_names;
    for k=1:numel(algo_names)
      if ~isempty(find(algo_names{k}==':'))
	algo_names{k}(1:max(find(algo_names{k}==':'))) = [];
      end
      if ~isempty(find(algo_dlls{k}==':'))
	algo_dlls{k}(max(find(algo_dlls{k}==':')):end) = [];
      end
      info.chain_names = algo_names;
      info.chain_dlls = algo_dlls;
      longalgo_names{k} = mhapath2dot([prefix,'.',algo_names{k}]);
    end
    for k=1:numel(algo_names)
      sGraph.aconnections(end+1,:) = ...
    	  {[mhapath2dot(prefix),':sw'],[longalgo_names{k},':nw']};
      sGraph.aconnections(end+1,:) = ...
    	  {[longalgo_names{k},':ne'],[mhapath2dot(prefix),':se']};
    end
    sGraph.chains{end+1} = longalgo_names;
  end
  if strcmp(info.id,'altplugs')
    algo_names = mha_get(mha,[prefix,'.plugs']);
    algo_dlls = algo_names;
    longalgo_names = algo_names;
    for k=1:numel(algo_names)
      if ~isempty(find(algo_names{k}==':'))
	algo_names{k}(1:max(find(algo_names{k}==':'))) = [];
      end
      if ~isempty(find(algo_dlls{k}==':'))
	algo_dlls{k}(max(find(algo_dlls{k}==':')):end) = [];
      end
      info.chain_names = algo_names;
      info.chain_dlls = algo_dlls;
    end
  end
  if strcmp(info.type,'parser')
    %if (~strcmp(info.cfgname,'mhaconfig_in')) && (~strcmp(info.cfgname,'mhaconfig_out'))
    entries = mha_mha2matlab( 'vector<string>', info.entries );
    info.plugin = false;
    if strmatch('mhaconfig_in',entries,'exact')
      info.plugin = true;
      info.mhaconfig_in = mha_get(mha,[prefix,'.mhaconfig_in']);
      info.mhaconfig_out = mha_get(mha,[prefix,'.mhaconfig_out']);
    end
    if ~isempty(prefix)
      sGraph.nodes(end+1,:) = {mhapath2dot(prefix),info};
      if ~isempty(parent) && ~strcmp(parentinfo.id,'mhachain') && ~strcmp(parentinfo.id,'split')
	sGraph.pconnections(end+1,:) = {mhapath2dot(parent), ...
		    mhapath2dot(prefix)};
      end
    end
    for e = entries
      if (~strcmp(e{:},'mhaconfig_in')) && (~strcmp(e{:},'mhaconfig_out'))
	if isempty( prefix )
	  sSub = e{:};
	else
	  sSub = [prefix,'.',e{:}];
	  sGraph.connections(end+1,:) = {...
	      mhapath2dot(prefix),...
	      mhapath2dot(sSub)...
		   };
	end
	sGraph = scan_sub( mha, sSub, sGraph, prefix, info );
      end
    end
    %end
  else
    sGraph.leaves(end+1,:) = {mhapath2dot(prefix),info};
  end
  
function sdot = mhapath2dot( smha )
  sdot = strrep( smha, '.', '_');
  
function write_dot_file( sGraph, fname, showall )
  f = fopen(fname,'w');
  fprintf(f,'digraph mha {\n');
  for k=1:size(sGraph.nodes,1)
    %style="filled", fillcolor="lightblue"
    sLabel = sGraph.nodes{k,2}.cfgname;
    if ~isempty(sGraph.nodes{k,2}.id)
      sLabel = sprintf('%s\\n(%s)',sLabel,sGraph.nodes{k,2}.id);
    else
      if ~isempty(sGraph.nodes{k,2}.dll)
	sLabel = sprintf('%s\\n(%s)',sLabel,sGraph.nodes{k,2}.dll);
      end
    end
    if isfield(sGraph.nodes{k,2},'mhaconfig_in')
      sLabel = sprintf('%s\\n\\ni: %dc/%d/%g Hz\\no: %dc/%d/%g Hz',sLabel,...
		       sGraph.nodes{k,2}.mhaconfig_in.channels,sGraph.nodes{k,2}.mhaconfig_in.fragsize,sGraph.nodes{k,2}.mhaconfig_in.srate,...
		       sGraph.nodes{k,2}.mhaconfig_out.channels,sGraph.nodes{k,2}.mhaconfig_out.fragsize,sGraph.nodes{k,2}.mhaconfig_out.srate);
    end
    fprintf(f,'  %s [label="%s", shape="box"',...
	    sGraph.nodes{k,1},sLabel);
    if sGraph.nodes{k,2}.plugin
      fprintf(f,', style="filled", fillcolor="lightblue"');
    end
    fprintf(f,'];\n');
  end
  if showall
    for k=1:size(sGraph.leaves,1)
      fprintf(f,'  %s [label="%s"];\n',...
	      sGraph.leaves{k},...
	      sGraph.leaves{k,2}.cfgname);
    end
    for k=1:size(sGraph.connections,1)
      fprintf(f,'  %s -> %s [penwidth=1,arrowhead="none"];\n',sGraph.connections{k,1},sGraph.connections{k,2});
    end
  end
  for k=1:size(sGraph.pconnections,1)
    fprintf(f,'  %s -> %s:n [penwidth=1,arrowhead="none"];\n',sGraph.pconnections{k,1},sGraph.pconnections{k,2});
  end
  for k=1:size(sGraph.aconnections,1)
    fprintf(f,'  %s -> %s [penwidth=3,arrowhead="normal",color="#A01010"];\n',sGraph.aconnections{k,1},sGraph.aconnections{k,2});
  end
  for k=1:numel(sGraph.chains)
    fprintf(f,'  { rank="same";\n');
    for k1=1:numel(sGraph.chains{k})
      fprintf(f,'      %s;\n',sGraph.chains{k}{k1});
    end
    fprintf(f,'  }\n');
  end
  fprintf(f,'}\n');
  fclose(f);

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