what is the purpose of "time window power limit" field in MSR_PKG_POWER_LIMIT register, how it is used, In one of my sandy bridge systems i got the following reading.
MSR: 1556 Value: 13236883076154104
Max Watts Raw1760
Min Watts Raw432
Max time window Raw47
Max Watts 220.000000
Min Watts 54.000000
Max time window 0.742188
Raw values of units are(convert to 1/2^x for actual units) :
Power units 3
Time units 10
Energy Status 16
The max time window is 0.742188secs, so my dump question is, how this field is used during RAPL operation.
My understanding is RAPL means the system will be bought down to low power state for some time, but the max time window specified is very low.