Re: [Gems-users] Simics 2.2 vs Simics 3.0 statistics difference

[Dan Gibson <degibson@xxxxxxxx>]

Berkin,

How are you deciding how long to run your simulations? Are you using
magic breakpoints before/after the benchmark? Or are you just running
for a fixed number of instructions/steps/cycles?

Can you please verify that you are setting both versions to emulate
instruction fetch?
(Simics command: instruction-fetch-mode instruction-fetch-trace)

Can you also verify that both runs use cpu-switch-time 1?
(Simics command: cpu-switch-time 1)

Regards,
Dan

On Sun, Mar 8, 2009 at 2:05 PM, Berkin Ozisikyilmaz
<boz283@xxxxxxxxxxxxxxxxxxxx> wrote:
> Hi,
>
> Since my current licenses are expiring soon. I have been trying to run the
> same scripts for the same experiments with the checkpoints created in simics
> 2.2 in simics 3.0. The total statistics seems to be significantly different.
> I am just posting a part of the logs to show the difference. Has anyone
> observed this? Is there a solution? Should I contact Simics forum and what
> should I tell?
>
> Thanks
> Berkin
> PS: If you need more details I can attach the whole logs too.
>
>
> Simics 3.0:
> Ruby_current_time: 56966471
> Ruby_start_time: 1
> Ruby_cycles: 56966470
>
> mbytes_resident: 415.297
> mbytes_total: 443.906
> resident_ratio: 0.935568
>
> Total_misses: 638457
> total_misses: 638457 [ 76793 26643 472 14111 92155 440 2386 6512 9838 11455
> 8045 793 279752 6949 91696 10417 ]
> user_misses: 143334 [ 21434 11522 0 0 41821 0 1082 0 8810 10365 2177 0 0 0
> 44952 1171 ]
> supervisor_misses: 495123 [ 55359 15121 472 14111 50334 440 1304 6512 1028
> 1090 5868 793 279752 6949 46744 9246 ]
>
> instruction_executed: 1942683921 [ 100000003 124129441 163319276 165435219
> 53861776 163460755 161657288 175769500 38246531 38301267 159181278 168205246
> 45314492 170155942 53902511 161743396 ]
> simics_cycles_executed: 32 [ 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 ]
> cycles_per_instruction: 0.469177 [ 0.569665 0.458928 0.348804 0.344343
> 1.05764 0.348502 0.35239 0.324098 1.48945 1.48733 0.357872 0.338672 1.25714
> 0.33479 1.05684 0.352203 ]
> misses_per_thousand_instructions: 0.328647 [ 0.76793 0.214639 0.00289004
> 0.0852962 1.71095 0.00269178 0.0147596 0.0370485 0.257226 0.299076 0.0505399
> 0.00471448 6.17357 0.040839 1.70115 0.0644045 ]
>
> --------------------
> Simics 2:
> Ruby_current_time: 27449208
> Ruby_start_time: 1
> Ruby_cycles: 27449207
>
> mbytes_resident: 337.574
> mbytes_total: 360.633
> resident_ratio: 0.936082
>
> Total_misses: 296966
> total_misses: 296966 [ 21740 589 369 7149 35485 266 349 8086 5925 134268
> 39354 635 6461 33942 545 1803 ]
> user_misses: 64611 [ 5863 0 0 474 16339 0 0 0 5232 0 20015 0 1669 15019 0 0
> ]
> supervisor_misses: 232355 [ 15877 589 369 6675 19146 266 349 8086 693 134268
> 19339 635 4792 18923 545 1803 ]
>
> instruction_executed: 935171606 [ 17858141 78628658 78723317 78953073
> 27873028 78695970 78809154 85782525 18431579 21706482 25875467 79044210
> 77362284 27932361 78666708 80828649 ]
> simics_cycles_executed: 32 [ 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 ]
> cycles_per_instruction: 0.469633 [ 1.53707 0.349099 0.34868 0.347665
> 0.984795 0.348801 0.3483 0.319986 1.48925 1.26456 1.06082 0.347264 0.354814
> 0.982703 0.34893 0.339597 ]
> misses_per_thousand_instructions: 0.317552 [ 1.21737 0.00749091 0.0046873
> 0.0905475 1.27309 0.0033801 0.00442842 0.0942616 0.321459 6.18562 1.5209
> 0.00803348 0.0835161 1.21515 0.00692796 0.0223064 ]
>
>
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