How is data from cpu_model.csv is used in kepler?

[vimalk78]

The columns in cpu_model.csv are Model,Architecture. sample values

E3-1290,Sandy Bridge
E7-8880L,Ivy Bridge
E7-4830,Haswell
D-1513N,Broadwell

how is the name of micro architecture used in kepler? is the name directly used as a feature in the model? or this name gets translated to some other feature set and then used?

[vimalk78]

cc: @rootfs @sunya-ch @marceloamaral @jiere

[jiere]

BTW, are another two csv files(data/power_data.csv, data/power_model.csv) still used in Kepler power modeling? If not, I will also clean them up in my PR later. Thanks.

[jiere]

There is different granularity to define CPU model, from coarse to slim:

1. Using CPU microarchitecture(i.e. Intel Golden Cove, which could be mapping to multiple products, see here)
2. Using CPU product codename(i.e. Intel Sapphire Rapids, which could be mapping to multiple products models, see here)
3. Using CPU model number(i.e. 143 for Intel Sapphire Rapids, which is defined here, and could be fetched either from cpuid or lscpu)
4. Using CPU product name(i.e. Intel® Xeon® Platinum 8470N, which is listed in this url and shown "8470N" in current cpu_model.csv)

Due to the current script logic, Model in cpu_model.csv currently refers to option 4 above, Architecture in cpu_mode.csv currently not exactly refers to option 1 above, since Sapphire Rapids is not microarchitecture but product codename...

So let's first confirm which one of above granularity is chosen for our Kepler power modeling?

[marceloamaral]

Please, see my comment here: #1021 (comment)
We can probably just use the CPU model name where we can get from /proc/cpuinfo

[jiere]

Sorry, there is some wording misunderstanding, IIUC, what you mean is still the microarchitecture, right?
Since CPU model name refers to the CPU Brand name:

$ cat /proc/cpuinfo |grep "model name"
model name      : 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz

I will refine the PR and use proper Golang pkg/lib instead of lscpu to act as alternative of cpuid -1 |grep uarch