cpuuse or ctload ?

Thu Apr 16 07:07:02 UTC 2009

Hi,

I'm using the Rtems Monitor with cpuuse and the capture engine to  
evaluate the cpu load of an application and the results given by  
cpuuse and ctload are differents even I take into account the task  
created by the capture engine.

Which tool give the most precise numbers ?

Thanks.

sa

For exemple:
rtems $ cpuuse
CPU Usage by thread
    ID        NAME     SECONDS   PERCENT
0x09010001   IDLE    47.718000   88.593
0x0A010001   UI1      0.468000    0.868
0x0A010002   ntwk     0.045000    0.083
0x0A010003   CSr0     0.020000    0.037
0x0A010004   CSt0     0.004000    0.007
0x0A010005   PMAP     0.006000    0.011
0x0A010006   RMON     0.019000    0.035
0x0A010007   TCLG     0.001000    0.001
0x0A010008   TSTM     0.000000    0.000
0x0A010009   TSPF     0.000000    0.000
0x0A01000A   TDCU     0.003000    0.005
0x0A01000B   TTCO     0.000000    0.000
0x0A01000C   CALH     0.084000    0.155
0x0A01000D   TTNO     0.000000    0.000
0x0A01000E   TTPX     0.000000    0.000
0x0A01000F   TTY1     0.000000    0.000
0x0A010010   TTY2     0.000000    0.000
0x0A010011   TTPZ     0.001000    0.001
0x0A010012   TTPM     0.000000    0.000
0x0A010013   CHMO     0.002000    0.003
0x0A010014   CHMU     0.006000    0.011
0x0A010015   SCTC     0.455000    0.844
0x0A010016   CLPF     0.005000    0.009
0x0A010017   GETM     0.236000    0.438
0x0A010018   PSCA     0.885000    1.643
0x0A010019   EDCU     0.002000    0.003
0x0A01001A   EDCU     0.000000    0.000
0x0A01001B   TSLV     0.723000    1.342
0x0A01001C   TRSQ     1.470000    2.729
0x0A01001D   TECU     0.047000    0.087
0x0A01001E   TEIO     0.081000    0.150
0x0A01001F   SQCU     0.017000    0.031
0x0A010020   SQTC     0.087000    0.161
0x0A010021   SQIO     0.972000    1.804
0x0A010022   SC64     0.048000    0.089
0x0A010023   ITTC     0.000000    0.000
0x0A010024   ITTM     0.000000    0.000
0x0A010025   ITT8     0.024000    0.044
0x0B010001        0.000000    0.000
0x0B010002        0.002000    0.003
0x0B010003        0.431000    0.800
Time since last CPU Usage reset 53.862000 seconds

rtems $
rtems $ copen 5000
capture engine opened.
rtems $ cenable
capture engine enabled.
rtems $
rtems $ ctload

  Press ENTER to exit.

sans TSP

      PID NAME RPRI CPRI STATE  %CPU     %STK FLGS    EXEC TIME
09010001 IDLE  255  255 READY   69.977%   0% a---   32840600
0a010006 RMON    1    1 READY    7.449%   0% a---   101622300
0a010026 CPlt    1    1 READY    6.065% 100% a---   407100
0a010021 SQIO   30   30 READY    4.369%   0% a---   2191700
0a01001c TRSQ   31   31 READY    3.006%   0% a---   1246200
0a010018 PSCA   37   37 DELAY    2.856%   0% a---   1310400
0b010003 ff8004?  254  254 READY    1.394%   0% a---   703400
0a01001b TSLV   34   34 READY    1.127%   0% a---   488900
0a01001d TECU   30   30 READY    0.770%   0% a---   330200
0a010022 SC64   30   30 READY    0.703%   0% a---   317500
0a010020 SQTC   30   30 READY    0.688%   0% a---   310500
0a01001e TEIO   30   30 READY    0.621%   0% a---   345400
0a01001f SQCU   30   30 READY    0.557%   0% a---   257300
0a010002 ntwk  100  100 READY    0.241%   0% a---   83200
0a010003 CSr0  100  100 READY    0.111%   0% a---   48300
0a010025 ITT8   30   30 Wmsg     0.041%   0% a---   21100
0b010001 ff8004?  254  254 DELAY:Wisig        0.017%   0% a---   2800
0a010017 GETM   44   44 DELAY    0.000%   0% a---   95700
0a010015 SCTC   46   46 DELAY    0.000%   0% a---   75900
0a01000c CALH   32   32 DELAY    0.000%   0% a---   62900

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