| # how to get timing path information | |
| Tool: OpenSTA | |
| Subcategory: Usage question | |
| ## Conversation | |
| ### msingh9 | |
| I am interested to find out my worst timing path. I can run following command to get path objects, but how do I get full report like start point, logic gates in between and end point. | |
| openroad> find_timing_paths -from * -to * -group_count 10 -sort_by_slack | |
| _d02fb74000000000_p_PathEnd _1005b54000000000_p_PathEnd _1040b44000000000_p_PathEnd _1006b54000000000_p_PathEnd _3071b64000000000_p_PathEnd _b0bfb54000000000_p_PathEnd _d0173d3f00000000_p_PathEnd _20cdb54000000000_p_PathEnd _9091bc4000000000_p_PathEnd _003db64000000000_p_PathEnd | |
| ### maliberty | |
| From the docs for find_timing_paths https://github.com/The-OpenROAD-Project/OpenSTA/blob/master/doc/OpenSTA.pdf | |
| ``` | |
| Use the get_property function to access properties of the paths. | |
| ``` | |
| ### msingh9 | |
| Thank you very much for prompt response. This works fantastically. I wrote a small TCL function to nicely print complete timing path with the arrival time. Maybe, it will be helpful to someone. | |
| ``` | |
| ### Document this #### | |
| Usage: report_timing_paths <args> | |
| Example: report_timing_paths -from * -to * -group_count 2 -sort_by_slack | |
| proc report_timing_paths {args} { | |
| set path_ends [sta::find_timing_paths_cmd "find_timing_paths" args] | |
| set pathno 1 | |
| foreach path_end $path_ends { | |
| set start_clock [get_property [get_property $path_end startpoint_clock] full_name] | |
| set start_point [get_property [get_property $path_end startPoint] full_name] | |
| set end_point [get_property [get_property $path_end endPoint] full_name] | |
| set end_clock [get_property [get_property $path_end endpoint_clock] full_name] | |
| set slack [get_property $path_end slack] | |
| puts "Path ${pathno} : " | |
| puts " [format "%-80s" $start_point], ${start_clock}" | |
| set points [get_property $path_end points] | |
| foreach point $points { | |
| set arrival [get_property $point arrival] | |
| set pin [get_property [get_property $point pin] full_name] | |
| set cslack [get_property $point slack] | |
| puts " [format "%-80s" $pin], $arrival" | |
| } | |
| puts " [format "%-80s" $end_point], ${end_clock}, [format "%.3f" $slack]" | |
| incr pathno | |
| puts "" | |
| } | |
| } | |
| ``` | |