Download "user manual"

2.3 Power estimation flow with powprof framework
The following figure shows the power estimation flow with our framework.
Perl binary
profiling
Bochs
emulator
powest
format file
powest
configuration
powest
Power
estimations
We have already discussed the two instruction traces’ alternatives, perl profiling and
bochs emulator. After using them, we have a powest formatted instruction trace file.
This file and a powest configuration file are given to the powest tool that creates the
final power estimation results. It must be noted that pwoest formatted instruction
traces and powest configuration files are platform dependant but powest is not. It can
be used with any processor or instruction format like binary, Intel or AT&T assembly
or even more be integrated inside any profiling framework to provide power
estimations.
2.4 The powest configuration file
The real power and flexibility of the powest tool relies on its configuration file. By
modifying its entries one can re-use the powest for estimating power on:
1.
2.
3.
4.
5.
Different processor with the same instruction set
Different processors with different instruction sets
Different systems
Different compilers or assembly notions.
Different operation modes in terms of voltage and frequency
We can see the example of the configuration file bellow.
Comment: All values in mA.
#config
#config
#config
#config
#config
static
volt 3.3
freq 133
dcurre
dclock
push.*
pop.* 428
451
4
100
100 mA static current
3.3V power supply
Frequency in MHz
400.0 Default cost 400mA
2
Default cost 2 clock cycles
1
stack opperations Push functions
stack opperations Pop functions
7