{ "guild": { "id": "1361349522684510449", "name": "wafer.space Community", "iconUrl": "2025-12_media/fb143eaa45770cbb40493d09b625e98b-09FD1.png" }, "channel": { "id": "1445866342438932643", "type": "GuildPublicThread", "categoryId": "1409660288822673408", "category": "questions", "name": "Failing Hold Checks", "topic": null }, "dateRange": { "after": "2025-11-30T23:59:59.999+00:00", "before": "2026-01-01T00:00:00+00:00" }, "exportedAt": "2026-05-11T18:09:41.6402078+00:00", "messages": [ { "id": "1445866342438932643", "type": "Default", "timestamp": "2025-12-03T19:56:38.935+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Has anyone been able to pass timing for hold checks on an 11MHz+ design? I have done everything I could think of, yet the corners still end up failing. The path is always pad -> reg nothing else.\n\nI've tried these settings:\n\nPL_RESIZER_HOLD_SLACK_MARGIN from 0.1, 0.3, 0.5 even 0.7 and none seem to make a difference (I do get less hold errors but all still fail)\nI've tried PL_RESIZER_ALLOW_SETUP_VIOS\n\nand\n\nset_input_delay -min 0, .5, 1, 1.5\n\nAny ideas?", "author": { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/2-ADBB4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1445869250244902994", "type": "Default", "timestamp": "2025-12-03T20:08:12.21+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Perhaps an unbalanced clock tree? You can view the clock tree in OpenROAD GUI.", "author": { "id": "323371864074485771", "name": "mole99", "discriminator": "0000", "nickname": "Leo Moser (mole99)", "color": null, "isBot": false, "roles": [ { "id": "1423020172595298314", "name": "Mod", "color": null, "position": 1 } ], "avatarUrl": "2025-12_media/3c7c17f3225f6e56f4dccd83f14383f2-73F83.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1445870302926999744", "type": "Reply", "timestamp": "2025-12-03T20:12:23.189+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "sure; I've passed hold checks on a 60MHz design :p", "author": { "id": "1187141985530818611", "name": "ravenslofty", "discriminator": "0000", "nickname": "Lofty", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/dd665ae27be32531af89aeb08fd05e04-1D5A4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [ { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/2-ADBB4.png" } ], "reference": { "messageId": "1445866342438932643", "channelId": "1445866342438932643", "guildId": "1361349522684510449" }, "inlineEmojis": [] }, { "id": "1445870444174376973", "type": "Default", "timestamp": "2025-12-03T20:12:56.865+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "I do often need to ECO some hold buffers in though", "author": { "id": "1187141985530818611", "name": "ravenslofty", "discriminator": "0000", "nickname": "Lofty", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/dd665ae27be32531af89aeb08fd05e04-1D5A4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1445871889712021636", "type": "Default", "timestamp": "2025-12-03T20:18:41.508+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "With the exception of the right spot which I'll look into it looks very balanced.", "author": { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/2-ADBB4.png" }, "attachments": [ { "id": "1445871889535996176", "url": "2025-12_media/Screenshot_2025-12-03_at_3.17.55_PM-42947.png", "fileName": "Screenshot_2025-12-03_at_3.17.55_PM.png", "fileSizeBytes": 81870 } ], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1445872139713511555", "type": "Reply", "timestamp": "2025-12-03T20:19:41.113+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Do you manually place them in? Did you change your input/output delays or do you use the templates default 0 for min?", "author": { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/2-ADBB4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [ { "id": "1187141985530818611", "name": "ravenslofty", "discriminator": "0000", "nickname": "Lofty", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/dd665ae27be32531af89aeb08fd05e04-1D5A4.png" } ], "reference": { "messageId": "1445870444174376973", "channelId": "1445866342438932643", "guildId": "1361349522684510449" }, "inlineEmojis": [] }, { "id": "1445872535160885409", "type": "Reply", "timestamp": "2025-12-03T20:21:15.395+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "read `54-openroad-stapostpnr/summary.rpt` to find the failing corners, then look at `54-openroad-stapostpnr//min.rpt` to find the failing paths, and then [follow the docs](https://librelane.readthedocs.io/en/latest/usage/using_ecos.html)", "author": { "id": "1187141985530818611", "name": "ravenslofty", "discriminator": "0000", "nickname": "Lofty", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/dd665ae27be32531af89aeb08fd05e04-1D5A4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [ { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/2-ADBB4.png" } ], "reference": { "messageId": "1445872139713511555", "channelId": "1445866342438932643", "guildId": "1361349522684510449" }, "inlineEmojis": [] }, { "id": "1445872687925690498", "type": "Default", "timestamp": "2025-12-03T20:21:51.817+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "it's manual in that you have to point the tooling at the cell you want to insert a hold buffer for, but there's no physical placement or such", "author": { "id": "1187141985530818611", "name": "ravenslofty", "discriminator": "0000", "nickname": "Lofty", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/dd665ae27be32531af89aeb08fd05e04-1D5A4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [ { "emoji": { "id": "", "name": "\ud83d\udc4f", "code": "clap", "isAnimated": false, "imageUrl": "2025-12_media/1f44f-3D381.svg" }, "count": 2, "users": [ { "id": "228329196504481793", "name": "nxmq99", "discriminator": "0000", "nickname": "nxmq99", "color": null, "isBot": false, "avatarUrl": "2025-12_media/a894465ce64c0d99a11e309c80c403db-DA6C3.png" }, { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "avatarUrl": "2025-12_media/2-ADBB4.png" } ] } ], "mentions": [], "inlineEmojis": [] }, { "id": "1445873529651204217", "type": "Default", "timestamp": "2025-12-03T20:25:12.5+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Thank you, I have been looking at those corners but I didn't know about the ECO step!", "author": { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/2-ADBB4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1445873775194279936", "type": "Default", "timestamp": "2025-12-03T20:26:11.042+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "(the downside of having a 60MHz design is that I have basically given up on meeting slow corner setup without major cheating)", "author": { "id": "1187141985530818611", "name": "ravenslofty", "discriminator": "0000", "nickname": "Lofty", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/dd665ae27be32531af89aeb08fd05e04-1D5A4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1445874188090081450", "type": "Default", "timestamp": "2025-12-03T20:27:49.484+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "My original target was 90MHz and now I'm just trying to get any passing. I'm currently failing 10MHz...", "author": { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/2-ADBB4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1445874418621485189", "type": "Default", "timestamp": "2025-12-03T20:28:44.447+00:00", "timestampEdited": "2025-12-03T20:28:48.471+00:00", "callEndedTimestamp": null, "isPinned": false, "content": "are you using the 9-track libraries?", "author": { "id": "1187141985530818611", "name": "ravenslofty", "discriminator": "0000", "nickname": "Lofty", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/dd665ae27be32531af89aeb08fd05e04-1D5A4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1445875058063970425", "type": "Default", "timestamp": "2025-12-03T20:31:16.902+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Whatever the default one is.", "author": { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/2-ADBB4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1445875652225011933", "type": "Default", "timestamp": "2025-12-03T20:33:38.561+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "7-track. Try adding `STD_CELL_LIBRARY: gf180mcu_fd_sc_mcu9t5v0` to your `librelane/config.yaml`", "author": { "id": "1187141985530818611", "name": "ravenslofty", "discriminator": "0000", "nickname": "Lofty", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/dd665ae27be32531af89aeb08fd05e04-1D5A4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [ { "emoji": { "id": "", "name": "\ud83d\udc4d", "code": "thumbsup", "isAnimated": false, "imageUrl": "2025-12_media/1f44d-27259.svg" }, "count": 1, "users": [ { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "avatarUrl": "2025-12_media/2-ADBB4.png" } ] } ], "mentions": [], "inlineEmojis": [] }, { "id": "1445876161984069644", "type": "Default", "timestamp": "2025-12-03T20:35:40.097+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "I'll give it a go after I try ECO. Surely 10MHz is possible with the 7-track? At this point - what do I know haha!", "author": { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/2-ADBB4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1445881315307159684", "type": "Default", "timestamp": "2025-12-03T20:56:08.745+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "@Lofty Did you ever run into unconnected ECO pins after the eco step?", "author": { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/2-ADBB4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [ { "id": "1187141985530818611", "name": "ravenslofty", "discriminator": "0000", "nickname": "Lofty", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/dd665ae27be32531af89aeb08fd05e04-1D5A4.png" } ], "inlineEmojis": [] }, { "id": "1445884346933186621", "type": "Default", "timestamp": "2025-12-03T21:08:11.541+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Looks like the disconnected pins are pwr/gnd: eco_buffer_0/VDD, eco_buffer_0/VNW, eco_buffer_0/VPW, and eco_buffer_0/VSS", "author": { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/2-ADBB4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1445885538736541748", "type": "Default", "timestamp": "2025-12-03T21:12:55.689+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "What does your I/O connect to? If it's not actually driven synchronously alongside your clock input. You may be able to further relax the timing.\nWith a `input_delay -min 0` you're telling the tools, the external i/o arrives with the clock. So it tries to add 4ns of delay to ensure a leaf in your clock tree.", "author": { "id": "274535015969456128", "name": "greg.hashtag.9468", "discriminator": "0000", "nickname": "Greg", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/fb1d1a9872c8ef9ce08855c75f2963a7-A225D.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1445885936578728008", "type": "Default", "timestamp": "2025-12-03T21:14:30.542+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Everything is synchronous with the clock input.", "author": { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/2-ADBB4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1445907135476011179", "type": "Default", "timestamp": "2025-12-03T22:38:44.753+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "(oof, did not know about ECO or 9T stuff either. probably would have saved a lot of agony fussing with settings \ud83d\ude05 )", "author": { "id": "384390069412429834", "name": "polyfractal", "discriminator": "0000", "nickname": "BreakingTaps", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/8d8c1d8b8ad51d6cdb1a47512c39b297-42908.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [ { "id": "", "name": "\ud83d\ude05", "code": "sweat_smile", "isAnimated": false, "imageUrl": "2025-12_media/1f605-42B43.svg" } ] }, { "id": "1445907388228960383", "type": "Default", "timestamp": "2025-12-03T22:39:45.014+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "Maybe, ECO isn't working for me still and neither is the 9T", "author": { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/2-ADBB4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] }, { "id": "1445910109375959070", "type": "Default", "timestamp": "2025-12-03T22:50:33.786+00:00", "timestampEdited": null, "callEndedTimestamp": null, "isPinned": false, "content": "For anyone that runs into the ECO issue:\n\n\"+OpenROAD.DetailedRouting\": \"Odb.InsertECOBuffers\"\n \"+Odb.InsertECOBuffers\": \"OpenROAD.DetailedRouting\"\n\nI haven't confirmed yet, but I added the Odb.InsertECOBuffers step but I didn't add the routing after which likely left the ECO buffers unconnected.", "author": { "id": "805909190333038612", "name": "trev5514", "discriminator": "0000", "nickname": "Trevor Peyton", "color": null, "isBot": false, "roles": [], "avatarUrl": "2025-12_media/2-ADBB4.png" }, "attachments": [], "embeds": [], "stickers": [], "reactions": [], "mentions": [], "inlineEmojis": [] } ], "messageCount": 22 }