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ppc64_cpu - Display cpu characteristics of PowerPC systems

PPC64_CPU(8) Linux on Power Service Tools PPC64_CPU(8)

NAME

ppc64_cpu - Display cpu characteristics of PowerPC systems

SYNOPSIS

/usr/sbin/ppc64_cpu [ command ] [ options ]

DESCRIPTION

The ppc64_cpu command is used to display and set cpu characteristics on PowerPC platforms.
 

OPTIONS

--smt
Display the current smt setting for the system. The output will state whether smt is off indicating there is only one thread per core online, smt is on indicating that all threads of every core is online, the smt is in a mixed state indicating that the number of threads online varies per core, or
 
--smt={on|off}
Set the current smt state for the system to either on, which will online every thread in every core on the system, or off which will leave each core on the system with only one thread online.
 
--smt=value
Set the smt state for each core to the specified value.
 
--cores-present
Display the number of cores present.
 
--cores-on
Display the number of cores online.
 
--cores-on=value
Put exactly value number of cores online. Note that this will either online or offline cores to achieve the desired result.
 
--dscr
Display the current Data Stream Control Register (DSCR) setting for the system.
 
--dscr=value
Set the DSCR setting for the system to value.
 
--dscr [pid]
Display the DSCR setting for process pid.
 
--dscr=value [pid]
Set the DSCR to the specified value for process pid.
 
--smt-snooze-delay
Display the current smt-snooze-delay setting.
 
--smt-snooze-delay=value
Set the smt-snooze-delay to the specified value.
 
--run-mode
Display the current diagnostics run mode.
 
--run-mode=value
Set the current diagnostics run mode to value.
 
--frequency [-t time]
Determine the cpu frequency. The default sampling period is one second unless a time is specified with the -t time option.
 
--subcores-per-core
Display the number of subcores per core.
 
--subcores-per-core=value
Set the number of subcores per core to value.
 
--threads-per-core
Display the number of threads per core.
 
--info
Display system state information. The output will print a line for each core and possible sub-core along with the thread numbers for each thread in the core with an asterick next to it if the thread is online.
 
--version
Print the version number.
 

AUTHOR

Written by Anton Blanchard and Nathan Fontenot
January 2015 Linux