( ESNUG 380 Item 14 ) ------------------------------------------- [10/25/01]
From: Lars Rzymianowicz <larsrzy@ti.uni-mannheim.de>
Subject: We Got 24X Speed Up With The New DC/ACS 2001.08 Design Budgeter !
Hi John,
I just installed the new 2001.08 release and found out that the new Design
Budgeter is significantly faster than PrimeTime. We're using ACS for our
current ASIC, and prior to 2001.08, DC called PrimeTime for generation of
gate-level budgets. That took 12 hours for our design -- longer than the
whole compile of the design. I saw some other notes about long runtimes of
PrimeTime budgeting.
With 2001.08, DC has a built-in budgeter, which seems to be much faster. It
took only 30 min for our design. That's an impressive 24X speed-up! To
enable it, you have to set a var:
set acs_use_dc_gate_level_budgeting "true"
With this set to true, DC will use its own budgeter for gate-level budgeting,
which is done for acs_recompile_design or acs_refine_design commands in ACS.
- Lars Rzymianowicz
University of Mannheim Mannheim, Germany
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