!hvKktgBrxMoFFYQDgA:matrix.org

skywater-pdk: openlane

266 Members
Bridged to #openlane on skywater-pdk Slack1 Servers

Load older messages


SenderMessageTime
3 Apr 2021
@_slack_skywater-pdk_U01EYE54L5N:matrix.orgIztok Jeras I think I got all the components I needed:
 additional components from OPENLANE not part of the PDK
.INCLUDE ../../../pdks/open_pdks/sky130/custom/models/short.spice
.INCLUDE ../../../pdks/open_pdks/sky130/custom/models/diode.spice

 library of primitives from https://github.com/google/skywater-pdk.git
.LIB ../../../../skywater-pdk/libraries/sky130_fd_pr/latest/models/sky130.lib.spice tt

* include Skywater 130nm cell libraries
.INCLUDE ../../../pdks/sky130A/libs.ref/sky130_fd_sc_hd/spice/sky130_fd_sc_hd.spice
10:33:10
@_slack_skywater-pdk_U01F30ES9S8:matrix.orgshbo changed their display name from Shubho to shbo.15:15:10
4 Apr 2021
@_slack_skywater-pdk_U01EYE54L5N:matrix.orgIztok Jeras Is there a way to get a Standard Delay Format (SDF) file for the synthesis or a later stage verilog netlist? 11:42:38
5 Apr 2021
@_slack_skywater-pdk_U018LA3KZCJ:matrix.orgMatt Liberty Iztok Jeras opensta has a write_sdf command you could try from openroad 03:04:54
@_slack_skywater-pdk_U0175T39732:matrix.orgMatthew Guthaus joined the room.16:59:24
@_slack_skywater-pdk_U0175T39732:matrix.orgMatthew Guthaus If I set STD_CELL_LIBRARY and re-run "make pdk", it seems that flow.tcl still doesn't get the new library. I'm doing this like:
export STD_CELL_LIBRARY="sky130_fd_sc_ls"
make pdk
make mount
echo $STD_CELL_LIBRARY (not set, so I set it again)
export STD_CELL_LIBRARY="sky130_fd_sc_ls"
./flow.tcl -design spm
...
INFO]: Extracting the number of available metal layers from /home/mrg/openlane/pdks/sky130A/libs.ref/sky130_fd_sc_hd/techlef/sky130_fd_sc_hd.tlef
[ERROR]: during executing: "python3 /openLANE_flow/scripts/extract_metal_layers.py -t /home/mrg/openlane/pdks/sky130A/libs.ref/sky130_fd_sc_hd/techlef/sky130_fd_sc_hd.tlef -o /openLANE_flow/designs/spm/runs/05-04_16-57/tmp/met_layers_list.txt"
[ERROR]: Exit code: 1
[ERROR]: Last 10 lines:
Traceback (most recent call last):
  File "/openLANE_flow/scripts/extract_metal_layers.py", line 37, in  module 
    with open(techlef_name, "r") as f:
FileNotFoundError: [Errno 2] No such file or directory: '/home/mrg/openlane/pdks/sky130A/libs.ref/sky130_fd_sc_hd/techlef/sky130_fd_sc_hd.tlef'
17:01:20
@_slack_skywater-pdk_U0175T39732:matrix.orgMatthew Guthaus (make test also fails) 17:02:06
@_slack_skywater-pdk_U0175T39732:matrix.orgMatthew Guthaus It looks like this configuration configuration/general.tcl overwrites the library no matter what:
set ::env(STD_CELL_LIBRARY) "sky130_fd_sc_hd"
18:26:54
@_slack_skywater-pdk_U016ELL4X4M:matrix.org_slack_skywater-pdk_U016ELL4X4M [efabless/openlane] Issue opened by mguthaus 18:33:48
@_slack_skywater-pdk_U0175T39732:matrix.orgMatthew Guthaus
In reply to@_slack_skywater-pdk_U016ELL4X4M:matrix.org
[efabless/openlane] Issue opened by mguthaus
I submitted a PR with the fix
20:39:53
6 Apr 2021
@_slack_skywater-pdk_U01RQH1PW7Q:matrix.orgYingwen Tan joined the room.00:39:36
@_slack_skywater-pdk_U01TAPYU477:matrix.orgErnesto Conde joined the room.14:15:31
@_slack_skywater-pdk_U01EYE54L5N:matrix.orgIztok Jeras Matt Liberty I was looking at the write_sdf function from OpenSTA, and I can only partially use it to create a SDF file. 15:49:24
@_slack_skywater-pdk_U018LA3KZCJ:matrix.orgMatt Liberty Iztok Jeras what do you mean by "partially"? 15:49:53
@_slack_skywater-pdk_U01EYE54L5N:matrix.orgIztok Jeras I edited the Openlane script [sta.tcl](https://github.com/efabless/openlane/blob/master/scripts/sta.tcl). At the end of this script I added:
write_sdf $::env(opensta_report_file_tag).sdf
I haven't checked the details, but it appears to populate the min/max part of triples, but typ is left unpopulated. I looked at the source code for write_sdf and it appears there is no code to populate the typ part of the triple.
15:51:37
@_slack_skywater-pdk_U01EYE54L5N:matrix.orgIztok Jeras This is the code for writing triples. https://github.com/The-OpenROAD-Project/OpenSTA/blob/0d73b5b65a185329ea77478d4670d8a103b0b710/sdf/SdfWriter.cc#L412-L449 15:56:34
@_slack_skywater-pdk_U0175T39732:matrix.orgMatthew Guthaus
In reply to@_slack_skywater-pdk_U01EYE54L5N:matrix.org
This is the code for writing triples. https://github.com/The-OpenROAD-Project/OpenSTA/blob/0d73b5b65a185329ea77478d4670d8a103b0b710/sdf/SdfWriter.cc#L412-L449
It seems that would be an OpenRoad issue then?
15:57:36
@_slack_skywater-pdk_U01EYE54L5N:matrix.orgIztok Jeras The only way I see to get typical timing into a SDF file is to load the tt liberty file for either min or max or both and redo the export to sdf. 15:58:32
@_slack_skywater-pdk_U01EYE54L5N:matrix.orgIztok Jeras
In reply to@_slack_skywater-pdk_U0175T39732:matrix.org
It seems that would be an OpenRoad issue then?
not obviously, since the STA tool itself focuses on min/max timing checks, they might not wish to consume memory for unused typical timing
15:59:40
@_slack_skywater-pdk_U01EYE54L5N:matrix.orgIztok Jeras
In reply to@_slack_skywater-pdk_U01EYE54L5N:matrix.org
not obviously, since the STA tool itself focuses on min/max timing checks, they might not wish to consume memory for unused typical timing
but again, there is report_power, which is often observed at typical timing
16:02:14
@_slack_skywater-pdk_U01EYE54L5N:matrix.orgIztok Jeras
In reply to@_slack_skywater-pdk_U01EYE54L5N:matrix.org
but again, there is report_power, which is often observed at typical timing
I tried a few ways to get the typical timing out, but I soon get conflicts with previously executed steps. So I decided to try to get some support, before I waste too much time.
16:09:14
@_slack_skywater-pdk_U01CPRDNSVA:matrix.orgHarrison joined the room.17:09:57
@_slack_skywater-pdk_U016ELL4X4M:matrix.org_slack_skywater-pdk_U016ELL4X4M [efabless/openlane] Issue opened by shafnaskm 17:50:52
@_slack_skywater-pdk_U0175T39732:matrix.orgMatthew Guthaus
In reply to@_slack_skywater-pdk_U01EYE54L5N:matrix.org
I tried a few ways to get the typical timing out, but I soon get conflicts with previously executed steps. So I decided to try to get some support, before I waste too much time.
It seems that just averaging min/max might be the way to go. This is for a given corner, right? So I'm not sure what typical would be in the context of STA which finds max and min paths...
19:46:40
14 Apr 2021
@trapmunewsdon1971:matrix.org@trapmunewsdon1971:matrix.org joined the room.15:07:59
@trapmunewsdon1971:matrix.org@trapmunewsdon1971:matrix.org left the room.15:09:07
4 May 2021
@jellolag:matrix.orgThe Wanderer joined the room.20:29:28
13 May 2021
@rencugamob1981:matrix.orgrencugamob1981 joined the room.18:43:48
20 Jun 2021
@nagasabah:matrix.org@nagasabah:matrix.org left the room.10:12:10
6 Jul 2021
@loesterfrancob:matrix.orgLoester F. B. joined the room.23:05:13

There are no newer messages yet.


Back to Room List