1 Apr 2021 |
| Sukanta Dey changed their profile picture. | 04:32:18 |
Olof Kindgren | In reply to@_slack_skywater-pdk_U01GE4F371D:matrix.org mkk ^ Rob Taylor Actually had a talk with Ahmed Ghazy and Mohamed Shalan yesterday about Edalize, OpenLane and cloud use-cases | 06:26:38 |
Rob Taylor | In reply to@_slack_skywater-pdk_U0169AQ41L6:matrix.org I have access through Tim/Openroad and it is definitely helpful. But I still feel I am not using the gcp to its full potential. Do you have access to gcp? Maybe you could help me enhance my scripts 😉 sure, would be happy to see if i can help | 08:42:51 |
Rob Taylor | In reply to@_slack_skywater-pdk_U016HSA1H5Y:matrix.org Rob Taylor Actually had a talk with Ahmed Ghazy and Mohamed Shalan yesterday about Edalize, OpenLane and cloud use-cases nice :) | 08:43:09 |
Nguyen.Dao | In reply to@_slack_skywater-pdk_U01GE4F371D:matrix.org nice :) Update: the flow works fine with 1x2 and 2x2 CLBs fabrics without timing optimization (OpenPhySyn doesn’t support disable timing loops). For the 4x4 CLBs fabric, it’s stuck at global routing (fastroute)? | 12:54:10 |
| Jamey Hicks joined the room. | 13:00:27 |
Rob Taylor | In reply to@_slack_skywater-pdk_U01L8BR7FFA:matrix.org Update: the flow works fine with 1x2 and 2x2 CLBs fabrics without timing optimization (OpenPhySyn doesn’t support disable timing loops). For the 4x4 CLBs fabric, it’s stuck at global routing (fastroute)? Does the time go up exponentially? | 13:00:55 |
Rob Taylor | In reply to@_slack_skywater-pdk_U01GE4F371D:matrix.org Does the time go up exponentially? Could we produce a 2x2 clb gds and then stitch together to make a bigger fabric? | 13:00:56 |
Nguyen.Dao | In reply to@_slack_skywater-pdk_U01GE4F371D:matrix.org Could we produce a 2x2 clb gds and then stitch together to make a bigger fabric? Running time are almost same: 12s (1x2 clbs) and 13s (2x2 clbs) | 13:05:49 |
Rob Taylor | In reply to@_slack_skywater-pdk_U01L8BR7FFA:matrix.org Running time are almost same: 12s (1x2 clbs) and 13s (2x2 clbs) Interesting. Same for 3x3? | 13:06:55 |
Rob Taylor | In reply to@_slack_skywater-pdk_U01GE4F371D:matrix.org Interesting. Same for 3x3? I wonder - are you hitting memory limits and it’s going into swap? | 13:07:14 |
Nguyen.Dao | In reply to@_slack_skywater-pdk_U01GE4F371D:matrix.org I wonder - are you hitting memory limits and it’s going into swap? I haven’t tried 3x3, need to ask Jing to generate codes. I don’t think memory is limited, it used only 1% of memory (64GB) when routing | 13:09:05 |
Rob Taylor | In reply to@_slack_skywater-pdk_U01L8BR7FFA:matrix.org I haven’t tried 3x3, need to ask Jing to generate codes. I don’t think memory is limited, it used only 1% of memory (64GB) when routing Same when going the 4x4? | 13:09:57 |
Nguyen.Dao | In reply to@_slack_skywater-pdk_U01GE4F371D:matrix.org Same when going the 4x4? yes, same memory at 1% | 13:10:19 |
Rob Taylor | In reply to@_slack_skywater-pdk_U01L8BR7FFA:matrix.org yes, same memory at 1% Very odd. Ok let’s get a 3x3 tested, find out where this breaks and then let’s submit a bug | 13:11:16 |
Rob Taylor | In reply to@_slack_skywater-pdk_U01GE4F371D:matrix.org Very odd. Ok let’s get a 3x3 tested, find out where this breaks and then let’s submit a bug Or maybe 2x4 if that’s easier | 13:13:29 |
Nguyen.Dao | In reply to@_slack_skywater-pdk_U01GE4F371D:matrix.org Or maybe 2x4 if that’s easier it’s OK with 2x4, global routing took 16s, looks like the running time doesn’t go exponentially | 15:30:51 |
Rob Taylor | In reply to@_slack_skywater-pdk_U01L8BR7FFA:matrix.org it’s OK with 2x4, global routing took 16s, looks like the running time doesn’t go exponentially Weird! | 15:33:59 |
Rob Taylor | In reply to@_slack_skywater-pdk_U01GE4F371D:matrix.org Weird! Ok, it’d be good to prepare a test case that shows the working version and the non working version and submit that as a bug against openlane | 15:34:36 |
_slack_skywater-pdk_U016ELL4X4M | [efabless/openlane] Issue opened by nguyendao-uom | 16:48:29 |
| Nayiri joined the room. | 21:08:28 |
2 Apr 2021 |
Mitch Bailey | How is openlane related to openroad? Is openlane a wrapper to the openroad flow or an enhancement? | 06:44:21 |
Rob Taylor | Mitch Bailey openlane uses openroad | 07:13:01 |
Rob Taylor | interesting project here for anyone into HLS - https://github.com/google/xls/issues/370 | 07:13:21 |
Amro Tork | In reply to@_slack_skywater-pdk_U017X0NM2E7:matrix.org How is openlane related to openroad? Is openlane a wrapper to the openroad flow or an enhancement? Openlane encompasses several tools including OpenRoad. It's an entire flow from RTL till GDS. | 11:20:09 |
Iztok Jeras | Hi, I would like to run some spice simulations of a digital netlist.
I went through README.md and built a digital block.
I created a spice simulation included the netlist, wrote stimuli, but I have trouble with cell and transistor libraries. | 19:34:06 |
Iztok Jeras | for cell libraries I used:
OPENLANE_ROOT/pdks/sky130A/libs.ref/sky130_fd_sc_hd/spice/sky130_fd_sc_hd.spice
if included before the netlist, then cell blackboxes from the netlist are ignored
now I have trouble finding a proper set of primitive (transistor, ...) libraries | 19:36:58 |
Iztok Jeras | I experimented a bit with libraries from some other projects I found online, but they are incomplete (mising _lvt, _hvt parts). | 19:38:12 |
Iztok Jeras | What would be the preferred option to create a proper spice library? Preferably one where I can select the desired corner. | 19:39:58 |
3 Apr 2021 |
| David Murphy joined the room. | 03:20:37 |