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cts.tcl: drop the 4_1_error.odb written when detailed placement fails #4823

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cts.tcl: drop the 4_1_error.odb written when detailed placement fails #4823

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ae5f9e3
cts.tcl: drop the 4_1_error.odb written when detailed placement fails
oharboe Nov 11, 2026
28ccfda
EndpointSlackTracking.md: *-failed .odb files get no snapshot
oharboe Nov 11, 2026
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4 changes: 2 additions & 2 deletions docs/contrib/EndpointSlackTracking.md
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Original file line number Diff line number Diff line change
Expand Up @@ -24,8 +24,8 @@ Every step then writes `$(REPORTS_DIR)/<step>_endpoint_slack.json`, e.g.
It works in the single-process `flow/scripts/flow.tcl` flow as well. Steps
that just copy their input (`orfs_copy_db`, e.g. `5_3_fillcell` without fill
cells) re-time the design if it is loaded, or else copy the previous step's
snapshot. Intermediate `.odb` files written through `orfs_write_db` (e.g. CTS's
`4_1_error.odb`) also get a snapshot; `*-failed` ones don't.
snapshot. Any other `.odb` written through `orfs_write_db`, such as an
ad-hoc checkpoint, also gets a snapshot; `*-failed` ones don't.

A placed step is timed with the parasitics OpenROAD has for it: a bare
`estimate_parasitics` estimates from the global routes when there are any,
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12 changes: 2 additions & 10 deletions flow/scripts/cts.tcl
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Expand Up @@ -39,11 +39,7 @@ set_placement_padding -global \
-left $::env(CELL_PAD_IN_SITES_DETAIL_PLACEMENT) \
-right $::env(CELL_PAD_IN_SITES_DETAIL_PLACEMENT)

set result [catch { detailed_placement_helper -quiet } msg]
if { $result != 0 } {
orfs_write_db $::env(RESULTS_DIR)/4_1_error.odb
error "Detailed placement failed in CTS: $msg"
}
detailed_placement_helper -quiet

log_cmd estimate_parasitics

Expand All @@ -60,11 +56,7 @@ if { !$::env(SKIP_CTS_REPAIR_TIMING) } {
run_lec_test 4_rsz 4_before_rsz_lec.v 4_after_rsz_lec.v
}

set result [catch { detailed_placement_helper -quiet } msg]
if { $result != 0 } {
orfs_write_db $::env(RESULTS_DIR)/4_1_error.odb
error "Detailed placement failed in CTS: $msg"
}
detailed_placement_helper -quiet

log_cmd check_placement -placeable -verbose

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