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Update Wire Cost Map #2721

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Merged
merged 7 commits into from
Sep 27, 2024
Merged

Update Wire Cost Map #2721

merged 7 commits into from
Sep 27, 2024

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amin1377
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@amin1377 amin1377 commented Sep 12, 2024

Description

Changing the index order in the router lookahead 6D lookup for hopefully improved cache locality on 3D archs.

Router Lookahead

Change wire delay map (6D array) from [from_layer][from_chan][from_seg][to_layer][dx][dy] → [from_layer][to_layer][from_chan][from_seg][dx][dy] to have a better cache locality.

@github-actions github-actions bot added VPR VPR FPGA Placement & Routing Tool lang-cpp C/C++ code labels Sep 12, 2024
@vaughnbetz
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Should definitely do a QoR test to check this isn't slower (hopefully faster). Need one 2D and one 3D QoR test.

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Looks good; one comment to change. Also need QoR data, and should make sure the 3D tests are run manually.

@amin1377
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Titan - 2D
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@amin1377
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3D Titan Other (nightly test 7)
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@vaughnbetz vaughnbetz merged commit 3e53a93 into master Sep 27, 2024
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@vaughnbetz vaughnbetz deleted the update_wire_cost_map branch September 27, 2024 14:15
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2 participants