Re: [Gems-users] What happens if NUMBER_OF_VIRTUAL_NETWORKS is greater than needed?

[Ikhwan Lee <ikhwan@xxxxxxxxxxxxxxx>]

How is a simulation randomized? I've been getting exactly the same
results for each run with same simulation parameters.

Thanks,
Ikhwan

On Sat, Apr 3, 2010 at 12:24 PM, Dan Gibson <degibson@xxxxxxxx> wrote:
> Average many runs of each (e.g., 8 runs w/ VNs = 4, 8 runs w/ VNs = 5) and
> see if there is a statistically significant difference or not. Since the
> difference in runtime is pretty small, this could be due only to difference
> in RANDOM_SEED.
>
> That said, I don't actually know how Ruby might react to having 'extra' VNs.
>
> Regards,
> Dan
>
> On Fri, Apr 2, 2010 at 4:52 PM, Ikhwan Lee <ikhwan@xxxxxxxxxxxxxxx> wrote:
>>
>> The MOESI_SMP_directory protocol needs 4 virtual networks; however, it
>> should also run fine with 5 virtual networks since the 5th virtual
>> network will never be used by the protocol. The question is, when I
>> compare the results of two simulations (one with 4 and one with 5
>> virtual networks), I get something like below.
>>
>> 153c153
>> < NUMBER_OF_VIRTUAL_NETWORKS: 4
>> ---
>> < NUMBER_OF_VIRTUAL_NETWORKS: 5
>> 1457c1458
>> < Ruby_current_time: 25741756
>> ---
>> > Ruby_current_time: 27894100
>> 1459c1460
>> < Ruby_cycles: 25741755
>> ---
>> > Ruby_cycles: 27894099
>> 1461,1468c1462,1469
>> < mbytes_resident: 480.223
>> < mbytes_total: 508.523
>> < resident_ratio: 0.944347
>> <
>> < Total_misses: 2736589
>> < total_misses: 2736589 [ 221437 184551 181803 181854 165005 165866
>> 172800 177348 162455 164810 168559 167311 146275 158797 158483 159235
>> ]
>> < user_misses: 199059 [ 6640 12908 16388 12543 9998 14914 11967 11834
>> 17170 11744 11685 12695 13389 11501 12351 11332 ]
>> < supervisor_misses: 2537530 [ 214797 171643 165415 169311 155007
>> 150952 160833 165514 145285 153066 156874 154616 132886 147296 146132
>> 147903 ]
>> ---
>> > mbytes_resident: 177.781
>> > mbytes_total: 498.574
>> > resident_ratio: 0.356579
>> >
>> > Total_misses: 2976004
>> > total_misses: 2976004 [ 231381 201401 206063 197190 177795 182883 187239
>> > 196167 175355 180539 183532 179732 157077 173355 171734 174561 ]
>> > user_misses: 200169 [ 12482 12593 12510 11561 13957 9487 11581 12406
>> > 17732 13232 11811 11721 12437 12137 12108 12414 ]
>> > supervisor_misses: 2775835 [ 218899 188808 193553 185629 163838 173396
>> > 175658 183761 157623 167307 171721 168011 144640 161218 159626 162147 ]
>> --- omitted the rest
>>
>> The differences are not too big, but still quite strange since I
>> expected them to be exactly the same. Any idea on what is happening?
>> I'm using Garnet fixed pipeline network.
>>
>> Thanks,
>> Ikhwan
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>
>
>
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>
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