hello i m consistently hitting a segmentation violation in o

Question

hello i m consistently hitting a segmentation violation in openroad during routing i believe any hints to debug

aryap · Answer

just kidding it s placement ``` openroad exit openLANE flow scripts openroad or replace tcl | amp tee gt amp stdout openLANE flow designs 250 runs debug logs placement replace log```

aryap · Answer

i m tryign to tile some macros but i haven t done any manual placement so that s probably what i m doing wrong

aryap · Answer

hmmm my lef and gds paths seem right then i do `add macro placement mymacro 0 0` followed by `manual macro placement f` in interactive mode then i try to run `run placement` and i get the segfault this is on rc3

aryap · Answer

i tried develop and it gets further but manual macro place py fails ```arya growly ~ $ cat ~ src openlane develop designs 250 runs debug logs macro placement log Placing the following macros mac0 0 0 NONE Placing mac0 Traceback most recent call last File openLANE flow scripts manual macro place py line 77 in lt module gt part split = part 0 split IndexError list index out of range```

aryap · Answer

wait

aryap · Answer

is it because of my macro s name

aryap · Answer

if i add the macro as follows it doesn t fail there ```add macro placement mac cluster 0 0 manual macro placement```

aryap · Answer

ok two further questions 1 is the macro name the name of the macro type or the instance

aryap · Answer

2 if it s the type how do we arrange instances

aryap · Answer

if i use the macro type name manual macro placement doesn t crash but then replace fails

aryap · Answer

``` run synthesis run floorplan add macro placement mac cluster 0 0 manual macro placement run placement INFO BinSize = 1792850 1792480 INFO NumBins = 4 ERROR REPL 0 Error RePlAce terminated with errors ERROR Failure in global placement```

Ahmed Ghazy · Answer

You are probably just missing the orientation of the macro N for North for example e g ```add macro placement mac cluster 0 0 N```

Ahmed Ghazy · Answer

In any case non descriptive errors are always bad

Ahmed Ghazy · Answer

1 amp 2 It s the instance name not the type

Ahmed Ghazy · Answer

About replace failing are there any other non placed cells macros that you want replace to place Or have you already placed all macros cells in the designs manually

aryap · Answer

hmm adding N doesn t seem to have solved either problem

aryap · Answer

rc3 still crashes on run placement segmentation violation

aryap · Answer

develop fails at manual macro placement ``` INFO Manual Macro Placement Placing the following macros my mac 0 0 N Placing my mac Traceback most recent call last File openLANE flow scripts manual macro place py line 77 in lt module gt part split = part 0 split IndexError list index out of range ERROR during executing python3 openLANE flow scripts manual macro place py i openLANE flow designs 250 runs debug results floorplan fpga 250 floorplan def o openLANE flow designs 250 runs debug results floorplan fpga 250 floorplan def macro placement def c openLANE flow designs 250 runs debug tmp macro placements cfg | amp tee gt amp stdout openLANE flow designs 250 runs debug logs macro placement log ERROR Exit code 1 ERROR Last 10 lines child process exited abnormally ERROR Please check python3 log file ERROR Dumping to openLANE flow designs 250 runs debug error log```

Amr Gouhar · Answer

< aryap> the N orientation is optional you don t need to add it Of course seg faulting is terrible and this should be fixed blame that on me the search amp replace in that script is bad But could you verify the name of the instance from the def file and can u share the def file or a snippet from the components section that defines that instance

aryap · Answer

ok i think you mean this DEF file `fpga 250 floorplan def`

aryap · Answer

in that there s ```COMPONENTS 170929 my mac mac cluster ```

aryap · Answer

when i try to repeat this in rc3 the floorplan def doesn t have the component instance thinking face

aryap · Answer

i ll upload the design to my fork of the develop branch

Ahmed Ghazy · Answer

< aryap> In rc3 setting EXTRA LEFS only won t do You would need to use `add lefs` additionally In `develop` setting EXTRA LEFS is enough

aryap · Answer

ah awesome let me try that

Ahmed Ghazy · Answer

< aryap> The manual macro placement currently expects you to have an initial placement first so run `global placement` first before `manual macro placement`

aryap · Answer

great still get a segfault though

aryap · Answer

``` INFO FillerInit FillerCellArea = nan INFO FillerInit FillerCellSize = nan nan ERROR during executing replace lt openLANE flow scripts replace gp tcl | amp tee gt amp stdout openLANE flow designs 250 runs debug logs placement replace log ERROR Last 10 lines child killed segmentation violation ERROR Please check replace log file ERROR Dumping to openLANE flow designs 250 runs debug error log replace version RePlAce Version 1 0 0```

aryap · Answer

i now do ` flow tcl design 250 overwrite tag debug interactive` and run `source config macro tcl` where `macro tcl` is ```add lefs src openLANE flow designs 250 mac runs cluster 750 750 0 3 results magic mac cluster lef run synthesis run floorplan add macro placement my mac 0 0 global placement manual macro placement```

aryap · Answer

git is being such a pain

Ahmed Ghazy · Answer

Could you try with global placement or instead

aryap · Answer

Thanks < Ahmed Ghazy> I get a different error but replace at least doesn t crash ``` INFO MacroInstsArea = 562500000000 InitialPlace Iter 1 CG Error 0 HPWL 190785990 InitialPlace Iter 2 CG Error 6 37974e 17 HPWL 178067944 InitialPlace Iter 3 CG Error 0 HPWL 177995139 InitialPlace Iter 4 CG Error 0 HPWL 177923973 InitialPlace Iter 5 CG Error 0 HPWL 177891540 INFO FillerInit NumGCells = 1 INFO FillerInit NumGNets = 83 INFO FillerInit NumGPins = 131 INFO TargetDensity = 0 500000 INFO AveragePlaceInstArea = 562500000000 INFO IdealBinArea = 1125000019968 INFO IdealBinCnt = 9 INFO TotalBinArea = 11248041513600 INFO BinCnt = 2 2 INFO BinSize = 1676930 1676880 INFO NumBins = 4 ERROR REPL 0 Error RePlAce terminated with errors ERROR Failure in global placement```

aryap · Answer

is it possible I made the macro wrong

aryap · Answer

not sure if related `run floorplan` says ` ERROR Macro my mac is not placed`

aryap · Answer

seems to be in tapcell log

aryap · Answer

maybe the tapcells are blocking the macro placement

Ahmed Ghazy · Answer

< aryap> Floor planning when you have a macro goes as follows create an initial floorplan using `init floorplan` insert I O pins with `place io` run `global placement or` to get an initial placement for macros either manually or automatically place fix the macros `add macro placement` and `manual macro placement` in your case insert tap cells `tap decap or` which will also cut the standard cell rows around the fixed macros to prevent rails and other cells from being placed on top of them proceed with the steps in the usual flow in `flow tcl` starting from `run placement`

aryap · Answer

ah i get it that fixed it

aryap · Answer

i had no idea what i was doing before

aryap · Answer

thank you