@lhl thanks for your reply.
powertop, powerstat and cpupower are all in agreement on the idle states (turbostat is not in debian repo AFAIK).
# cpupower idle-info
CPUidle driver: intel_idle
CPUidle governor: menu
analyse du CPU 0 :
Number of idle states: 4
Available idle states: POLL C1_ACPI C2_ACPI C3_ACPI
POLL:
Flags/Description: CPUIDLE CORE POLL IDLE
Latency: 0
Usage: 14131
Duration: 2974257
C1_ACPI:
Flags/Description: ACPI FFH MWAIT 0x0
Latency: 1
Usage: 83986
Duration: 25827274
C2_ACPI:
Flags/Description: ACPI FFH MWAIT 0x21
Latency: 127
Usage: 104945
Duration: 142211325
C3_ACPI:
Flags/Description: ACPI FFH MWAIT 0x60
Latency: 1048
Usage: 98141
Duration: 4165073409
I tried the 5.18.0-4 from testing same result, but with 5.19 from experimental repo I get C10 :
# cpupower idle-info
CPUidle driver: intel_idle
CPUidle governor: menu
analyse du CPU 0 :
Number of idle states: 5
Available idle states: POLL C1E C6 C8 C10
POLL:
Flags/Description: CPUIDLE CORE POLL IDLE
Latency: 0
Usage: 4841
Duration: 901197
C1E:
Flags/Description: MWAIT 0x01
Latency: 2
Usage: 8648
Duration: 1620716
C6:
Flags/Description: MWAIT 0x20
Latency: 170
Usage: 321
Duration: 154874
C8:
Flags/Description: MWAIT 0x40
Latency: 200
Usage: 313
Duration: 205503
C10:
Flags/Description: MWAIT 0x60
Latency: 230
Usage: 5549
Duration: 23446705
# powerstat -cDHRf 2
Summary:
CPU: 3.54 Watts on average with standard deviation 2.59
Note: power read from RAPL domains: package-0, uncore, package-0, core, psys.
These readings do not cover all the hardware in this device.
C-State Resident Count Latency
C10 97.151% 56444 230
C8 0.092% 1181 200
C6 0.073% 1146 170
C1E 0.384% 8633 2
POLL 0.001% 36 0
C0 2.299%