AVR-Chat

On Apr 7, 2006, at 2:15 PM, Alex Shepherd wrote:

> Hi Guys,
>
> Is there a utility in the WinAVR bundle that can display a sorted  
> list of
> function sizes?

Have you tried

# sort by size, but mix up ROM and RAM
avr-nm --size-sort --print-size -r myprog.elf

# Sort first by type of symbol, and then by size
avr-nm --size-sort --print-size -r dbg/qdpp.elf  | sort +2 -3  +1  
-2nr | less

# If you'd rather see decimal than hex, then use "-t d" in the  
command as well:
avr-nm -t d --size-sort --print-size -r dbg/qdpp.elf  | sort +2 -3   
+1 -2nr

The output of which looks like (decimal address, decimal size, type,  
name):

08389700 00000042 B QF_pool_
08389681 00000018 B QF_active_
08389671 00000009 B QK_readySet_
08389746 00000004 B QF_tickCtr_
08389744 00000002 B QF_subscrList_
08389750 00000002 B QF_timeEvtListHead_
08389680 00000001 B QF_intLockNest_
08389699 00000001 B QF_isrNest_
08389742 00000001 B QF_maxPool_
08389743 00000001 B QF_maxSignal_
08388945 00000008 D QEP_reservedEvt_
08388864 00000002 D QDPP_table
08388895 00000001 D QK_currPrio_
00008190 00002252 T vfprintf
00017422 00001714 T QHsm_execTran
00001278 00001030 T Table_serving
00012010 00000562 T QActive_get__
00011476 00000534 T QActive_postFIFO__
00016524 00000512 T QHsm_dispatch

Read the manpage for avr-nm for a better explanation.

B = BSS (uninitialized data)
D = initialized data
T = ROM (Text)

with the lowercase letters standing for "local" rather than  
"global" (external). The meaning of which varies with language. In C,  
things that are declared "static" end up being "local" (file scope).

You can use the standard Unix commands (which you're probably already  
familiar with, of course) for selection, paging, redirection, etc.  
(I'm assuming that WinAVR comes with these? I'm not sure, and I don't  
have a Windows machine readily at hand.) Anyway, you can get the  
Cygwin utilities if you don't have a standard set of programs (at a  
minimum: sed, less, sort, grep, tee; perl, ruby, or awk can make more  
sophisticated programs easier to write).

avr-nm ... | less  	(page by page)
avr-nm ... | grep -i ' T '  (display only ROM (Text) (T or t) symbols)
avr-nm ... > someFile.txt   (save in a file)
avr-nm ... | tee someFile.txt | less    (save in a file and also page  
by page on the screen)
etc.

You can get endlessly creative with these.
Here, for instance, is a one-liner that will display a list of ROM,  
then RAM objects sorted by size (biggest first by section); "ROM" or  
"RAM" means external(global), "rom" or "ram" means local.

avr-nm -t d --size-sort --print-size -r dbg/qdpp.elf  | sed -e 's/  
T / ROM /' -e 's/ t / rom /' -e 's/ [DB] / RAM /' -e 's/ [db] /  
ram /' | sort +2 -3rf  +1 -2nr

The output of this looks like (address/size/type/name):

00008190 00002252 ROM vfprintf
00017422 00001714 ROM QHsm_execTran
00001278 00001030 ROM Table_serving
00007490 00000700 rom flcvt
00012010 00000562 ROM QActive_get__
00011476 00000534 ROM QActive_postFIFO__
00016524 00000512 ROM QHsm_dispatch
00015266 00000468 ROM QMPool_init
00010830 00000460 ROM QK_schedule_
00014150 00000354 ROM QF_publish
00014504 00000352 ROM QF_tick
00017036 00000336 ROM QHsm_init
00012758 00000332 ROM QActive_subscribe_
00019250 00000318 ROM __unpack_f
00000292 00000256 ROM QF_log2Lkup
00002308 00000254 ROM philosopherStart
00004090 00000246 ROM displyPhilStat
00013860 00000228 ROM QF_poolInit
00015928 00000224 ROM QTimeEvt_arm__
00004778 00000218 rom lcd_read
...
00000286 00000006 rom l_this_file
00000195 00000005 rom l_this_file
00000231 00000005 rom __c.1971
00000200 00000004 rom l_this_file
00000236 00000003 rom l_this_file
08388998 00000170 ram l_philo
08389337 00000128 ram UART_TxBuf
08389502 00000128 ram UART1_TxBuf
08389228 00000099 ram l_regPoolSto
08389178 00000050 ram l_philQueueSto
08389700 00000042 RAM QF_pool_


And if you don't want to see addresses, you can do this:

avr-nm -t d --size-sort -r dbg/qdpp.elf  | sed -e 's/ T / ROM /' -e  
's/ t / rom /' -e 's/ [DB] / RAM /' -e 's/ [db] / ram /' | sort +1  
-2rf  +0 -1nr

which gives you this:

00002252 ROM vfprintf
00001714 ROM QHsm_execTran
00001030 ROM Table_serving
00000700 rom flcvt
00000562 ROM QActive_get__
00000534 ROM QActive_postFIFO__
00000512 ROM QHsm_dispatch
00000468 ROM QMPool_init
00000460 ROM QK_schedule_
00000354 ROM QF_publish
00000352 ROM QF_tick
00000336 ROM QHsm_init
00000332 ROM QActive_subscribe_
00000318 ROM __unpack_f

I'm sure once you get the hang of the various utilities this will  
come naturally.
Alternatively, I suppose you could put your favorite commands into  
shell scripts so you could run them in the future.

Enjoy!

> I had been using the avr-sizex utility to produce a sorted list of  
> functions
> and their size which is shown below. However the avr-sizex utility  
> isn't
> supplied in the newer WinAVR versions and so I have had to copy it  
> from
> previous ones.
>
> What are others doing to determine the sizes of functions?
>
> Cheers
>
> Alex Shepherd
>
> -------------------------------------------------------------
>
> E:> avr-sizex -m atmega8 -f 8192 -t 500 locochrono.elf
>
>     Flash     SRAM     EEPROM
>     -----     ----     ------
>       57%      21%         0%
>
> Top Functions                        Top Variables (global/static)
> ------------------------------       ------------------------------
> __vector_6           598 bytes       LnBuffer             140 bytes
> processSVMessage     562 bytes       fcSlotData            14 bytes
> recvLnMsg            452 bytes       fcTimer                7 bytes
> sendLocoNetPacketT   316 bytes       eeSVRec                5 bytes
> fcTimerAction        228 bytes       SlowTimerActionLis     2 bytes
> processTimerAction   180 bytes       FastTimerActionLis     2 bytes
> doSVDeferredProces   158 bytes       DelayTimerTicks        2 bytes
> main                 146 bytes       lnCompareTarget        2 bytes
> sendLocoNetPacket    126 bytes       lnRxBuffer             2 bytes
> lcd_word             122 bytes       lnTxData               2 bytes
> processFastClockMe   110 bytes       LnPacket               2 bytes
> __vector_9           100 bytes       ucToggle               1 bytes
> displayStats          98 bytes       fcState                1 bytes
> lcd_init              96 bytes       fcFlags                1 bytes
> __vector_5            84 bytes       fcLastPeriod           1 bytes
> encodePeerData        72 bytes       lnTxSuccess            1 bytes
> addTimerAction        70 bytes       lnTxIndex              1 bytes
> decodePeerData        68 bytes       lnTxLength             1 bytes
> lcd_write             60 bytes       DeferredProcessing     1 bytes
> notifyFastClock       58 bytes       DeferredSrcAddr        1 bytes
> sendLocoNet4BytePa    52 bytes       SvStatus               1 bytes
> CheckAddressRange     50 bytes       Status                 1 bytes
> initLocoNet           46 bytes       lnCurrentByte          1 bytes
> fcDoNotify            44 bytes       SlowTimerAccumulat     1 bytes
> getLnMsgSize          44 bytes       FastTimerTicks         1 bytes
> lcd_clrxy             40 bytes       lnState                1 bytes
> strrev                32 bytes       SlowTimerTicks         1 bytes
> readSVStorage         32 bytes       lnBitCount             1 bytes
> initFastClock         32 bytes
> lcd_puts              30 bytes
> notifyFastClockFra    28 bytes
> initTimer             26 bytes
> delayTimer            22 bytes
> isValidSVStorage      20 bytes
> memcpy                18 bytes
> writeSVStorage        18 bytes
> writeSVDestination    18 bytes
> lcd_goto              16 bytes
> lcd_clear             14 bytes
> memset                14 bytes
> SendLAck              12 bytes
> recvLocoNetPacket     12 bytes
> initLnBuf             12 bytes
> delay_short           12 bytes
> readSVDestinationI    10 bytes
> pollFastClock         10 bytes
> lcd_putc               6 bytes
> getLnBufStats          6 bytes
> resetTimerAction       6 bytes
>
>
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-- 
Ned Konz
ned@bike-nomad.com




-- 
Ned Konz
MetaMagix embedded consulting
MetaMagix@gmail.com