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Power analysis » History » Version 4

jun chen, 03/27/2025 12:03 AM

1 1 jun chen 
# Power analysis
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## [[SDP power analysis]]





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## [[Usage model]] {also debug, annotation, correlation methods)





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## [[Debugging skill]]





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## [[Power save restore cache]] 





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## [[USDB support]]





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## Pre-request





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* Make sure you have already familiar with VP usage model:  [[New_hire_training(PV_PE_AE)]]





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## Glitch and switching activity





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* Check power analysis on switching activity attachment:"EDA_PA_basic_III.pptx"





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* Check glitch power optimization in detail attachment:"GlitchPower_Optimization.pptx"





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700 





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## Simple QA





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* Why internal power is negative (From D叩D叩D https://www.cnblogs.com/lelin/p/11412133.html  





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* TCl beginner's manual attachment:"Tcl_basic_command.pptx"





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* "extract_toggle_activity -format saif -file file.saif" command for Pin setting logic (From D叩D叩 attachment:"extract_toggle_activity.docx"  "report_toggle_activity" random crash fix experience (From D叩D叩 attachment:"report_toggle_activity.docx"





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* About VCD background attachment:"vcd.pptx"





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* debug utility with sanity check on TR, SWA, pow





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```





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// obsolete





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set_app_var ta debug_power 2





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// new usage





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set_app_var pow debug 20





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// will perform sanity check 





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report_power_analysis 





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// will show calculation procedure 





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report_power_calculation





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```





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* Debug power issue from RS side: {DD RS DD RS RocSyn 相叩)





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Step 0: follow this link to build local RS repository:





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http://10.30.200.21:8088/projects/hongtu-emir/wiki/TOP_NEWS_%E4%B8%B4%E6%97%B6%E7%BD%AE%E9%A1%B6





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编田和叩行叩辑叩DDDRocSyn (选叩branch syn_dev): http://10.30.200.21:8088/projects/hongtu-logicsynth/wiki/Build_Run





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Steo 1: setup golden RS and environment:





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**NOTE: <u>after fix, copy fix to hongtu branch repository and submit</u> {RS will regularly move code from hongtu to syndev branch)**





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如田碰叩license 问叩D叩D ~yzsun/.cshrc_user D叩D 





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```





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// central RS build:





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/ci—builds/syn—opt—rhel6/latest/bin/rhel6-64/RS





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// Or, you can use alias from /rndl/llchen/newhire—training/envsetup/.cshrc—user





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// and run below command to get local link to latest RS build





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getRS





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// Set necessary environment: setenv SYN—PV—PAT: /reg/db/rocsyn





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// Most of the RS tickets in





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/rndl/issues/ticket—number





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```





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* SWA default valueD





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```





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defaultDsignal toggle rate D 0.1 clkDD 2





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DDDDtoggle rateDDD set_app_var ta power_default_signal_toggle_rate 0.1 叩DDDDDD叩 





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DDDDDDDDDDDDDDD叩D 





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set_switching_activity -clear





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set_switching_activity -clock_net -number_of_toggles 2 -period_of_clock 2 





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set_switching_activity -signal_net -number_of_tiggles 0.l5 -period_of_clock 2





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```





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## Switching activity, glitch algorithm paper





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* attachment:"1991_Najm_Transition delay, a new measure of activity in digital circuits.pdf"





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* attachment:"1994_Chou_Estimation of Circuit Activity Considering Signal Correlations and simultaneous Switching.pdf" 





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* attachment:"1994_Kappor_Improving the Accuracy of Circuit Activity Measurement.pdf"





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* attachment:"1997_Lim_a statistical approach.pdf"





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* attachment:"1999_hashimoto_a practical gate resizing technique considering glitch reduction for low power design.pdf"  





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* attachment:"2006_Lamoureux_Activity Estimation for Field-Programmable Gate Arrays.pdf"





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## Liberty Power Calculation (Jeff)





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* attachment:"Giga-DA Liberty Power Calculation.pptx"





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* attachment:"Giga-DA NLPM Calculation.pptx"





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## [[High-level power estimation]]