This is because memory instructions -- loads and stores may take more than a single cycle.

--
Nilay

On Mon, 20 Feb 2012, Zheng Wu wrote:

No I'm using the atomic simple CPU, any ideas why there is a significant diff 
between them?

On 2012-02-20, at 10:16 AM, Mahmood Naderan <[email protected]> wrote:

Are you using O3CPU?

On 2/20/12, [email protected] <[email protected]> wrote:
Hi,

I am running some simulation in X86_SE mode and I am looking at the
stats.txt output file and I noticed that there is a difference between
the num_insts simulated in CPU vs num of Cycles simulated in CPU. I
thought that the simulator simulates 1 instruction every clock cycle,
so why is there a difference between them? Any advices would be
appreciated.

system.cpu.numCycles       11303         # number of cpu cycles simulated
system.cpu.num_insts       9810          # Number of instructions executed.

Thanks



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// Naderan *Mahmood;
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