Power analysis » History » Revision 3
Revision 2 (jun chen, 03/26/2025 11:59 PM) → Revision 3/7 (jun chen, 03/27/2025 12:03 AM)
# Power analysis
## [[SDP power analysis]]
## [[Usage model]] {also debug, annotation, correlation methods)
## [[Debugging skill]]
## [[Power save restore cache]]
## [[USDB support]]
## Pre-request
* Make sure you have already familiar with VP usage model: [[New_hire_training(PV_PE_AE)]]
## Glitch and switching activity
* Check power analysis on switching activity attachment:"EDA_PA_basic_III.pptx" attachment:"EDA_PA_basic_lll.pptx
* Check glitch power optimization in detail attachment:"GlitchPower_Optimization.pptx" attachment:"GlitchPower_Optimization.pptx
700
## Simple QA
* Why internal power is negative (From D叩D叩D https://www.cnblogs.com/lelin/p/11412133.html
* TCl beginner's manual attachment:"Tcl_basic_command.pptx"
* "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"
* About VCD background attachment:"vcd.pptx"
* debug utility with sanity check on TR, SWA, pow
```
// obsolete
set_app_var ta debug_power 2
// new usage
set_app_var pow debug 20
// will perform sanity check
report_power_analysis
// will show calculation procedure
report_power_calculation
```
* Debug power issue from RS side: {DD RS DD RS RocSyn 相叩)
Step 0: follow this link to build local RS repository:
http://10.30.200.21:8088/projects/hongtu-emir/wiki/TOP_NEWS_%E4%B8%B4%E6%97%B6%E7%BD%AE%E9%A1%B6
编田和叩行叩辑叩DDDRocSyn http://10.30.200.21:8088/projects/hongtu-emir/wiki/TOP_NEWS_%E4%B8%B4%E6%97%B6%E7%BD%AE%E9%A1%B6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
Steo 1: setup golden RS and environment:
**NOTE: <u>after fix, copy fix to hongtu branch repository and submit</u> {RS will regularly move code from hongtu to syndev branch)**
如田碰叩license 问叩D叩D ~yzsun/.cshrc_user D叩D
```
// central RS build:
/ci—builds/syn—opt—rhel6/latest/bin/rhel6-64/RS
// Or, you can use alias from /rndl/llchen/newhire—training/envsetup/.cshrc—user
// and run below command to get local link to latest RS build
getRS
// Set necessary environment: setenv SYN—PV—PAT: /reg/db/rocsyn
// Most of the RS tickets in
/rndl/issues/ticket—number
```
* SWA default valueD
```
defaultDsignal toggle rate D 0.1 clkDD 2
DDDDtoggle rateDDD set_app_var ta power_default_signal_toggle_rate 0.1 叩DDDDDD叩
DDDDDDDDDDDDDDD叩D
set_switching_activity -clear
set_switching_activity -clock_net -number_of_toggles 2 -period_of_clock 2
set_switching_activity -signal_net -number_of_tiggles 0.l5 -period_of_clock 2
```
## Switching activity, glitch algorithm paper
* attachment:"1991_Najm_Transition delay, a new measure of activity in digital circuits.pdf"
* attachment:"1994_Chou_Estimation of Circuit Activity Considering Signal Correlations and simultaneous Switching.pdf"
* attachment:"1994_Kappor_Improving attachment:"1994_Kappor_lmproving the Accuracy of Circuit Activity Measurement.pdf"
* attachment:"1997_Lim_a statistical approach.pdf"
* attachment:"1999_hashimoto_a practical gate resizing technique considering glitch reduction for low power design.pdf"
* attachment:"2006_Lamoureux_Activity Estimation for Field-Programmable Gate Arrays.pdf"
## Liberty Power Calculation {Jeff)
* attachment:"Giga-DA Liberty Power Calculation.pptx"
* attachment:"Giga-DA NLPM Calculation.pptx"
## [[High-level power estimation]]