Lines Matching +full:sleep +full:- +full:hardware +full:- +full:state

1 .TH "CPUPOWER-IDLE-INFO" "1" "0.1" "" "cpupower Manual"
4 cpupower\-idle\-info \- Utility to retrieve cpu idle kernel information
7 cpupower [ \-c cpulist ] idle\-info [\fIoptions\fP]
14 \fB\-f\fR \fB\-\-silent\fR
15 Only print a summary of all available C-states in the system.
17 \fB\-e\fR \fB\-\-proc\fR
23 .SH IDLE\-INFO DESCRIPTIONS
24 CPU sleep state statistics and descriptions are retrieved from sysfs files,
26 statistics when it enters or leaves an idle state, therefore on a very idle or
28 good overview about the usage and availability of processor sleep states on
31 Be aware that the sleep states as exported by the hardware or BIOS and used by
34 driver is used. It is also possible that the hardware overrules the kernel
36 On recent X86 platforms it is often possible to read out hardware registers
37 which monitor the duration of sleep states the processor resided in. The
38 cpupower monitor tool (cpupower\-monitor(1)) can be used to show real sleep
39 state residencies. Please refer to the architecture specific description
42 .SH IDLE\-INFO ARCHITECTURE SPECIFIC DESCRIPTIONS
44 POLL idle state
46 If cpuidle is active, X86 platforms have one special idle state.
47 The POLL idle state is not a real idle state, it does not save any
48 power. Instead, a busy\-loop is executed doing nothing for a short period of
49 time. This state is used if the kernel knows that work has to be processed
50 very soon and entering any real hardware idle state may result in a slight
57 The acpi_idle cpuidle driver retrieves available sleep states (C\-states) from
60 The C1 state is not retrieved from ACPI tables. If the C1 state is entered,
68 provides C\-state ACPI tables).
69 The intel_idle driver knows the sleep state capabilities of the processor and
70 ignores ACPI BIOS exported processor sleep states tables.
75 other cores is described in the cpupower(1) manpage in the \-\-cpu option
81 \fI/sys/devices/system/cpu/cpu*/cpuidle/state*\fP
90 cpupower(1), cpupower\-monitor(1), cpupower\-info(1), cpupower\-set(1),
91 cpupower\-idle\-set(1)