Re: [Gems-users] L1 cache latency

["Abhishek Ranjan" <absk82@xxxxxxxxx>]

Sorry for confusing you.. it does change!!

On 5/29/06, Abhishek Ranjan <absk82@xxxxxxxxx> wrote:

Hi Dan,

I did that but it doesn't change the total cycles for latencies 3 and 20.

Abhishek

 

On 5/29/06, Dan Gibson <degibson@xxxxxxxx> wrote:

Abhishek,
The L1_RESPONSE_LATENCY parameter is relevant only when "fast path" hits are disabled. Can you check your configuration file and see if the  REMOVE_SINGLE_CYCLE_FAST_PATH parameter is set to true? "Fast path" essentially disables the L1 timing (aka a models single-cycle L1). If it is "false", set it to true, recompile, and re-simulate with 3 and 20 cycle caches. You should notice a significant difference.

Regards,
Dan Gibson

Abhishek Ranjan wrote:

Hi,

I am simulating a simple program on ruby with simics. If I vary the L1_RESPONSE_LATENCY from 3 cycles to 20 cycles, I was hoping that the Rubycycles will increase a lot but they remain constant and I am not sure why this is so. Can anyone help me in that?

thanks,

Abhishek

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