This step shows the process of opening
a routed design with QoR suggestions and generating a new RQS file with strategies. For
details on the design, refer to Step 1: Understanding the Design.
- In the Vivado Design Suite, go to
and select the project located in <extract_Dir>/Lab3/project_2.
- In the Flow Navigator, click Open Implemented Design.
- From the pull-down menus, select OK. , and click
- In the RQA
Summary table, you will see the QoR Assessment Score and
Flow Guidance.
This table helps identify good candidate designs on which to use ML strategy
suggestions. QoR assessment scores of 3 and above have a chance to meet timing.
Designs with an RQA score of less than 3 are not prevented from generating ML
strategies.
- Click ML Strategy Availability.
This table details the required directives for the reference run to generate
strategies.
The status for all directives must be listed as OK to generate strategies. The requirements are as follows:
- The
opt_design
directive value must be either Default or Explore. - The
place_design
,phys_opt_design
, androute_design
conditions must be the same as each other and must be set to either Default or Explore.
- The
- In the Design
Runs window, confirm the strategy is
Vivado Implementation
Defaults. This requirement is met when a design has
been run with either the Vivado
implementation defaults or the
performance_explore
strategy. - From the pull-down menus, select OK. , and click
- In the QoR suggestion report, select GENERATED. Three new strategies have been generated.
- In the Strategy section, select
the topmost strategy. Here, you can see the details of the strategy being
suggested. It is possible to set these up manually, but to automate the process
more easily, the recommended flow is to read an RQS file containing strategies
and set the directive to RQS on the implementation commands.
- Select Write Suggestions to Project to write the
following files:
- A top-level RQS file that does not contain strategies (this file can be ignored)
- An RQS file for each strategy as well as any other QoR suggestions (written to the MLStrategy directory).
Generating the strategy RQS files is the first part of a two-step process. This way of generating the suggestions gives complete control over what other suggestions are in the RQS file. Other ways to generate these files are as follows:
- Automatic generation using AUTO_RQS flow (as seen in Using Report QoR Suggestions and Report QoR Assessment for Timing Closure)
- Clicking Generate ML Strategies from the right-click menu in the Design Runs window
- Automatic generation at the end of Stage 1: Design Optimization of intelligent design runs
- A post-route Tcl hook script