create_slack_histogram (::quartus::sta)

The following table displays information for the create_slack_histogram Tcl command:

Tcl Package and Version

Belongs to ::quartus::sta 1.0

Syntax create_slack_histogram [-h | -help] [-long_help] [-all_edges] [-append] [-clock_name <name> ] [-data_delay] [-file <name> ] [-hold] [-max_slack <max_slack> ] [-min_slack <min_slack> ] [-num_bins <num_bins> ] [-panel_name <name> ] [-partition] [-recovery] [-removal] [-setup] [-stdout]
Arguments -h | -help Short help
-long_help Long help with examples and possible return values
-all_edges Consider slacks at all edges, not just at the endpoint nodes (results in increased memory consumption)
-append If output is sent to a file, this option appends the result to that file. Otherwise, the file is overwritten. This option is not supported for HTML files.
-clock_name <name> Name of the Clock Domain
-data_delay Data Delay Analysis (only applicable for setup and recovery analysis)
-file <name> Sends the results to an ASCII or HTML file. Depending on the extension
-hold Hold Analysis
-max_slack <max_slack> Maximum slack value of the created histogram
-min_slack <min_slack> Minimum slack value of the created histogram
-num_bins <num_bins> Number of bins
-panel_name <name> Sends the results to the panel and specifies the name of the new panel
-partition Show slack count for each of the partition
-recovery Recovery Analysis
-removal Removal Analysis
-setup Setup Analysis
-stdout Send output to stdout, via messages. You only need to use this option if you have selected another output format, such as a file, and would also like to receive messages.
Creates a slack histogram in the timing report for the specified clock
domain "-clock_name," showing the number of timing edges within
various ranges of slacks for a clock setup analysis.  The histogram
can be named using the "-panel_name" option.

By default, only slack at the endpoint nodes of the timing netlist are
considered. To include slack at all edges in the histogram, use the
"-all_edges" option. This option results in increased memory consumption.

Use the "-setup", "-hold", "-recovery", or "-removal" options to
specify which kind of analysis should be performed. If none is
specified, setup analysis is used by default.

Reports can be directed to the Tcl console ("-stdout", default), a
file ("-file"), the Timing Analyzer graphical interface ("-panel_name"), or
any combination of the three.

The range of reported slack values can be controlled by specifying the
"-min_slack" and "-max_slack" options.  The number of bins (histogram
bars) can also be specified using the "-num_bins" option.

Use the "-partition" to show more information about each partition.
A path is in a partition if it's starting point is in the partition.
This option only works for "-panel".
Example Usage
project_open top

# Create a slack histogram for clk1, defaulting to
# the name "Slack Histogram (clk1)"
create_slack_histogram -clock_name clk1

# Create a slack histogram for clk2 named "MyHistogram"
create_slack_histogram -clock_name clk2 -panel_name MyHistogram

Return Value Code Name Code String Return
TCL_OK 0 INFO: Operation successful
TCL_ERROR 1 ERROR: Clock node not found or specified. Check valid clocks
TCL_ERROR 1 ERROR: Value <string> of option <string> is an invalid slack. Specify a valid slack value.
TCL_ERROR 1 ERROR: The max_slack value is less than or equal to the min_slack value. Specify a max_slack value that is greater than the min_slack value.
TCL_ERROR 1 ERROR: Timing netlist does not exist. Use create_timing_netlist to create a timing netlist.
TCL_ERROR 1 ERROR: Number of bins is 0. Specify a number greater than 0.