Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
tools:actsim [2024/07/04 13:29] – [Using pre-defined sources and sinks with data in the ACT file] rajittools:actsim [2025/03/25 10:29] (current) – [General options] rajit
Line 80: Line 80:
 ==== Timing ==== ==== Timing ====
  
-<code>random [<min> <max>]</code>+<code>random [-u] [<min> <max>]</code>
 Set the random timing mode and optionally specify the default random timing bounds for all nodes. Set the random timing mode and optionally specify the default random timing bounds for all nodes.
 +If ''-u'' is used, then randomization is only applied to unspecified delays.
  
 <code>random_seed <seed></code> <code>random_seed <seed></code>
Line 90: Line 91:
  
 <code>random_choice on|off</code> <code>random_choice on|off</code>
-turn on/off random exclhi/lo firings +Turn on/off random exclhi/lo firings. ACT uses ''mk_exclhi'' (''mk_excllo'') [[language:langs:spec#exclusive_directives|directives]] to force signals to be exclusive-high (exclusive low).  
- +This is typically used to model arbiters. If the ''mk_exclhi'' (''mk_excllo'') directive is used between a set of signals, and more than one signal is driven high (low) at the same simulation time, then turning on random choice randomizes the selection of the signal that is allowed to go high (low).
  
 ==== Running Simulation ==== ==== Running Simulation ====
Line 270: Line 270:
     sim::source_sequence<32, // 32-bit data     sim::source_sequence<32, // 32-bit data
                     3, // three data values                     3, // three data values
-                    {3,5,2}  // the data values+                    {3,5,2},  // the data values
                     false, // don't repeat the sequence of values                     false, // don't repeat the sequence of values
                     0, // source ID is zero for logging                     0, // source ID is zero for logging
Line 294: Line 294:
 { {
     adder a;     adder a;
-    // The first parameter is the file ID (default name is _infile_.0).  +    // The first parameter is the bitwidth 
-    // The second parameter is whether the file should be looped. +    // The second parameter is the file ID (default name is _infile_.0).  
-    // The third parameter is the bit-width. +    // The third parameter is whether the file should be looped. 
-    sim::file_source<0, false, 32> s1(a.A);+    // The fourth parameter is the source ID for logging 
 +    // The fifth parameter specifies if the source should log its output 
 +    sim::source_file<32, 0, false, 0, false> s1(a.A);
          
     // This could also use a file source     // This could also use a file source
-    sim::source_seq<32, false, 3, {7,9,3}> s2(a.B); +    sim::source_sequence<32, 3, {7,9,3}, false, 1, false> s2(a.B); 
-    sim::sink<true, // log output +    sim::sink<32,  // 32-bit 
-              32  // 32-bit+                     0, // sink ID for logging 
 +                     true // log values
               > sx(a.C);               > sx(a.C);
  }  }
Line 322: Line 325:
 An ACT configuration file can be read into ''actsim'' to control its behavior. The following summarizes configuration options that affect the behavior of the simulator (beyond the default ACT configurations that affect all tools). The simulator loads in the default ''actsim.conf'' file, but any of those parameters can be augmented/over-ridden using the ''-cnf'' [[stdoptions:start|command-line option]]. An ACT configuration file can be read into ''actsim'' to control its behavior. The following summarizes configuration options that affect the behavior of the simulator (beyond the default ACT configurations that affect all tools). The simulator loads in the default ''actsim.conf'' file, but any of those parameters can be augmented/over-ridden using the ''-cnf'' [[stdoptions:start|command-line option]].
  
 +==== General options ====
  
 +When ''actsim'' starts, any top-level initialization is executed. This includes the initialize body at the top level, as well as any reset protocols for channels  that cross between CHP and non-CHP components. To avoid infinite loops during this initialization phase, 100 rounds of simulation are executed by default. In some cases this amount of time may not be enough to finish the reset phase. The parameter ''reset_rounds'' can be adjusted to increase this period
 +<code>
 +begin sim
 +   int reset_rounds 100
 +end
 +</code>
 +   
 +''actsim'' also supports [[https://en.wikipedia.org/wiki/Standard_Delay_Format|SDF]] (Standard Delay Format) back-annotation for delays. This is usually enabled using the command-line option ''-S'', but can also be specified using the configuration file:
 +<code>
 +begin sim
 +  string sdf_file "annotate.sdf"
 +  int sdf_mangled_names 1
 +end
 +</code>
 +The parameter ''sdf_manged_names'' is set to 1 if the instance names in the file correspond to ACT [[config:start#output_generation_and_name_mangling|mangled names]], and 0 if they correspond to standard ACT names.
 ==== CHP configuration options ==== ==== CHP configuration options ====
  
Line 354: Line 373:
 If this is set to 1, then debugging messages are printed out showing the metrics that ''actsim'' was looking for in the configuration file, and what metrics were in fact found. If this is set to 1, then debugging messages are printed out showing the metrics that ''actsim'' was looking for in the configuration file, and what metrics were in fact found.
  
 +Metrics for energy, delay, leakage power, and area can be specified in a configuration file. These metrics are specified for each process type. (A better version is in the works...)  The way this works is as follows:
 +
 +<code>
 +begin sim
 +  begin chp
 +    begin mytype<>
 +       begin varname
 +          int D 42
 +          int E 84
 +        end
 +        real leakage 1e-8
 +        int area 23
 +     end
 +  end
 + end
 +</code>
 +This configuration file provides annotations for energy and delay for a ''mytype<>'' process. The ''varname'' is the name of the variable, and could be a channel or a variable that is assigned. ''D'' is the delay associated with a send/receive using that channel, or assignment to the variable (if it is an int/bool). ''E'' is the energy associated with the operation. Finally, there is a leakage power and area value for the process. These values override the defaults in a type-specific manner.
 ==== Mixed-signal simulation ==== ==== Mixed-signal simulation ====
  
Line 415: Line 451:
 </code> </code>
 This is the time at which the trace file output should stop. This is the time at which the trace file output should stop.
 +
 +<code>
 +string_table measure_statements ".measure ..." ".print i(X)..."
 +</code>
 +defines additional spice lines added to each generated spice file used for the device_level simulations, you can use it for eg. recording currents measuring avergage power and so on
  
 ==== Standard sim namespace helper functions ==== ==== Standard sim namespace helper functions ====
tools/actsim.1720099761.txt.gz · Last modified: 2024/07/04 13:29 by rajit
Except where otherwise noted, content on this wiki is licensed under the following license: GNU Free Documentation License 1.3


  • Show page
  • Old revisions
  • Backlinks
  • Recent Changes
  • Media Manager
  • Sitemap