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| litghost | hackerfoo: Something is clear from looking at the data is that some expansion maps are significantly more empty with the new method | 00:21 |
|---|---|---|
| litghost | hackerfoo: Specifically, NR1BEG -> BYP_ALT | 00:21 |
| litghost | hackerfoo: This is will no filling | 00:21 |
| litghost | with* | 00:22 |
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| litghost | hackerfoo: I think when picking sample points, we should be maxizing the number of nodes at the location | 00:50 |
| litghost | hackerfoo: I added a print for each expanded RR node, and only 10 NR1BEG nodes were expands | 00:51 |
| litghost | hackerfoo: I would've expected 3 * 3 * 4 = 36, nodes to be expanded | 00:51 |
| litghost | hackerfoo: Because there are 4 NR1BEG wires per interconnect switch box | 00:52 |
| litghost | hackerfoo: This might explain why there is more data sparcity, but I'm not confident yet | 00:52 |
| hackerfoo | litghost: I thought of just expanding a window at each point until there are enough samples, but I don't know how many is enough. | 00:59 |
| hackerfoo | Also that's probably expensive to compute without some spatial data structure. | 01:00 |
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| hackerfoo | Okay, I'm going to build a grid per segment type with counts of that segment type, and then pick the maximum count in each grid cell, nearest the center to break ties. | 01:11 |
| hackerfoo | litghost: Does that sound reasonable? | 01:12 |
| litghost | That was my thinking | 01:12 |
| litghost | One detail that may or may not matter is whether to use vpr or canonical point for centering | 01:13 |
| hackerfoo | The canonical point is probably better, right? | 01:14 |
| hackerfoo | Maybe I shouldn't use VPR coordinates at all. | 01:15 |
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| * lromor[m] sent a long message: < https://matrix.org/_matrix/media/r0/download/matrix.org/oxaCNpNgcSZkDtqLzqBRJehx > | 16:28 | |
| litghost | Yosys new inserts BUFG's automatically if "-noclkbuf" is not supplied. In the ROI graph, the BUFG is outside of the ROI. In the ROI-less graph the BUFG is required. | 16:31 |
| litghost | As we are finalizing the ROI breakout work, we have intentionally disabled the yosys BUFG insertion behavior to accomidate both ROI and ROI-less graphs | 16:32 |
| litghost | Once all xc7 graphs are ROI-less, we can re-enable Yosys's BUFG insertion | 16:32 |
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| lromor[m] | I see. Thanks for clarifying! | 16:50 |
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| hackerfoo | litghost: Is it worth changing the `set_X` methods in vtr::Rect to the builder pattern so you can write e.g. `rect.set_ymin(1).set_ymax(2).set_xmin(3).set_xmax(4)`? | 17:28 |
| litghost | hackerfoo: I'm relatively ambivalent on it, but you are welcome to make that change upstream and incorporate downstream | 17:29 |
| hackerfoo | Okay. I don't like methods to return `void` if they can return something useful. | 17:30 |
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