# Build times for our design Tool: Detailed Routing Subcategory: Performance analysis ## Conversation ### oharboe There is no question here, just a demonstration of the use of the build time summary for a design that has one top level macro and 5 macros at the top level. What is being built here are mock abstracts for the macros at the top level as we are only interested in regression testing the top level on our build servers. The top level is the slowest in detailed routing and we have 5 macros at the top level. We are not currently building the macros at the top level in parallel, though we intend to, but it would only cut the running time by 50%. ![image](https://github.com/The-OpenROAD-Project/OpenROAD/assets/2798822/4cf1cdad-6896-4d2f-9ad2-af2944e50761) This is the command I run to build a summary of all the build times `find -regex ./logs/.*/base -type d -exec python3 util/genElapsedTime.py -d {} \; | sort -hr -k2` Stage | time/s -- | -- 5_2_TritonRoute | 21313 5_2_TritonRoute | 7284 5_2_TritonRoute | 4744 5_2_TritonRoute | 2964 5_2_TritonRoute | 1825 5_2_TritonRoute | 1482 3_3_place_gp | 1274 4_1_cts | 1158 3_3_place_gp | 666 1_1_yosys | 617 4_1_cts | 379 6_report | 332 3_3_place_gp | 312 5_2_TritonRoute | 294 3_5_opendp | 293 1_1_yosys | 287 5_2_TritonRoute | 282 3_3_place_gp | 278 4_1_cts | 273 3_4_resizer | 224 4_1_cts | 203 5_1_fastroute | 198 6_report | 164 5_1_fastroute | 164 1_1_yosys | 160 5_1_fastroute | 142 3_1_place_gp_skip_io | 132 5_1_fastroute | 126 3_4_resizer | 123 6_report | 116 3_5_opendp | 109 ... | ... ### maliberty That is average behaviour as drt is costly. It does scale pretty well with threads so more CPUs helps. We do have some work to do distributed drt if you want to test it out but it isn't in the flow currently due to the extra setup overhead. ### maliberty How many threads in your data above? ### oharboe No question or suggestions here, just a datapoint that I thought it might have some value in sharing. ### maliberty Fwiw we test with 40 cpus and I know Google often uses 96. We have tested with several hundred in distributed mode.