| #!/usr/bin/env python3 |
| # SPDX-License-Identifier: GPL-2.0-only |
| |
| import raw_pylibcpupower as p |
| |
| # Simple function call |
| |
| """ |
| Get cstate count |
| """ |
| cpu_cstates_count = p.cpuidle_state_count(0) |
| if cpu_cstates_count > -1: |
| print(f"CPU 0 has {cpu_cstates_count} c-states") |
| else: |
| print(f"cstate count error: return code: {cpu_cstates_count}") |
| |
| """ |
| Disable cstate (will fail if the above returns is under 1, ex: a virtual machine) |
| """ |
| cstate_disabled = p.cpuidle_state_disable(0, 0, 1) |
| |
| match cstate_disabled: |
| case 0: |
| print(f"CPU state disabled") |
| case -1: |
| print(f"Idlestate not available") |
| case -2: |
| print(f"Disabling is not supported by the kernel") |
| case -3: |
| print(f"No write access to disable/enable C-states: try using sudo") |
| case _: |
| print(f"Not documented: {cstate_disabled}") |
| |
| """ |
| Test cstate is disabled |
| """ |
| is_cstate_disabled = p.cpuidle_is_state_disabled(0, 0) |
| |
| match is_cstate_disabled: |
| case 1: |
| print(f"CPU is disabled") |
| case 0: |
| print(f"CPU is enabled") |
| case -1: |
| print(f"Idlestate not available") |
| case -2: |
| print(f"Disabling is not supported by kernel") |
| case _: |
| print(f"Not documented: {is_cstate_disabled}") |
| |
| # Pointer example |
| |
| topo = p.cpupower_topology() |
| total_cpus = p.get_cpu_topology(topo) |
| if total_cpus > 0: |
| print(f"Number of total cpus: {total_cpus} and number of cores: {topo.cores}") |
| else: |
| print(f"Error: could not get cpu topology") |
