Using the -ultrathreads option - 2023.1 English

Vivado Design Suite User Guide: Implementation (UG904)

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2023.1 English

This option is available only for UltraScale+ SSI and vu440 devices and speeds up placement by distributing multiple threads indicated by general.maxThreads as evenly as possible across multiple SLRs. Placement results will differ slightly depending on whether or not ultrathreads is used.