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RVDS3.1 page table option for profiling

RaghavendraPrasad RaghavendraPrasad
Note: This was originally posted on 29th July 2009 at http://forums.arm.com

Hi all,
I'm using Realview3.1 Debugger connected to ARM1176JZFS core. I want to know the total no of cycles for my code. when I 'm connectiong the debugger with  "Default page table" option enabled, the cycles that I got from cycle count register is less than the cycle count that I got  without enabling the "Default page table" option.  I don't know whether  to enable thr option for calculating the total cycles. Can any one help in this regard. Thanks in advance.

Thanks & Regards,
M. Raghavendra
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  • Arm Employee Badge
    Note: This was originally posted on 30th July 2009 at http://forums.arm.com

    The default page table option starts the simulator with the MMU (or MPU) pre-enabled.  It saves you writing your own MMU/MPU initialization code, which is useful for quick tests.  It is the MMU/MPU which controls what is cacheable, so having these pre-enabled can have a big impact on performance.
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  • Arm Employee Badge
    Note: This was originally posted on 30th July 2009 at http://forums.arm.com

    The default page table option starts the simulator with the MMU (or MPU) pre-enabled.  It saves you writing your own MMU/MPU initialization code, which is useful for quick tests.  It is the MMU/MPU which controls what is cacheable, so having these pre-enabled can have a big impact on performance.
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