[Qemu-devel] Re: Total instruction count

[Qemu-devel] Re: Total instruction count

[Han Wang]

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Hi, All,

   This is a question regarding getting a total count of instructions being
executed in qemu.
   I would like to know how much instruction it takes to boot into linux on
a arm based processor.
   This is what I have done:
    - I used qemu-system-arm
    - I made a sd card image which contains the proper kernel, uImage and
boot loader
    - I booted the system using this command ./qemu-system-arm -M beagle -sd
/dev/mmcblk0
   Note that I used the mameo3-port of qemu to work on beagle board
emulation.

   There is an -d option in qemu-system-arm that allows me to do some
logging. However, after counting the total number of instruction that has
been logged.
   I doubt that the -d option only logs the instructions that have been
translated, not the instructions that are actually executed. Since the total
count I get from my log file is way smaller than what is should be.

   I wonder if there is anyway, or what modification should I do, to let
qemu log the total number of instructions that has been executed. It may
involves break the direct block-chaining mechanism inside qemu, I presume.
Any advice?


-- 
Han Wang
Electrical and Computer Engineering
Cornell University

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