Router completed with failures

[jaschengWoodpeckerx]

After successfully completing the previous steps, this error occurs when trying to run make dcp:

ERROR: [Vivado 12-172] File or Directory '/home/centos/xsofs/fpga/src/firesim/../../../repo/aws_fpga/hdk/common/shell_stable/build/checkpoints/from_aws/SH_CL_BB_routed.dcp' does not exist

Please help.

Thanks!

[jaschengWoodpeckerx]

After looking around, found this link to donwload: https://s3.amazonaws.com/aws-fpga-hdk-resources/hdk/shell_v04261818/build/checkpoints/from_aws/SH_CL_BB_routed.dcp
However, dcp build shows this error:

INFO: [Route 35-77] Router completed with failures. Please check the log file for Critical Warnings and run report_route_status for a summary of routing status.
ERROR: [Constraints 18-1000] Routing results verification failed due to partially-conflicted nets (Up to first 10 of violated nets): WRAPPER_INST/CL/u_dut/top/sim/target/Dut_/u_top/core_with_l2/core/frontend/bpu/predictors/components_1/tables_3/table_banks_0_io_w_req_bits_data_0_tag[4] WRAPPER_INST/CL/u_dut/top/sim/target/Dut_/u_top/core_with_l2/core/frontend/bpu/predictors/components_1/tables_3/table_banks_0_io_w_req_bits_data_0_tag[6]

Vivado version: v2021.2

[goshuh]

Hi,

The root cause of this problem is that the XiangShan design is too big to be easily put on the AWS FPGA. You might need to have a look at this, where some high-fanout wires are promoted to use global clock routing resources to mitigate congestion. The magic numbers there are carefully chosen to only include wires that might later cause routing errors. In addition, you may also need to play with various strategies/directives here for synthesis/optimization/placement/routing. My experience is that even a single line of code modification can result in totally different strategies/magic numbers to successfully generate the final bitstream.

Hope this helps!

[jaschengWoodpeckerx]

Actually I believe the first comment in the issue still stands.
You should provide that file in the repo, or at least specify the instructions to obtain that file. Otherwise, one still cannot run make dcp due to that error.