NAME¶

ppc64_cpu - cpu settings utility

SYNOPSIS¶

ppc64_cpu [OPTION]

DESCRIPTION¶

This utility allows users to view and set the cpu SMT, DSCR and smt-snooze-delay settings.

OPTIONS¶

--smt

Get current SMT state.

--smt={on|off}

Set SMT state.

--cores-present

Get the number of cores present.

--cores-on

Get the number of cores currently online.

--cores-on=X

Put exactly X cores online.

--dscr [-p <pid>]

Get current DSCR system setting or, optionally, for <pid>.

--dscr=<val> [-p <pid>]

Change DSCR system setting or, optionally, for <pid>.

--smt-snooze-delay

Get current smt-snooze-delay setting.

--smt-snooze-delay=<val>

Change smt-snooze-delay setting.

--run-mode

Get current diagnostics run mode.

--run-mode=<val>

Set current diagnostics run mode.

--frequency [-t <time>]

Determine cpu frequency for <time> seconds, default is 1 second.

--subcores-per-core

Get number of subcores per core.

--subcores-per-core=X

Set subcores per core to X (1 or 4).

--threads-per-core

Get number of threads per core.

--info

Display system state information.

AUTHOR¶

ppc64_cpu was written by Anton Blanchard. This manual page was written by Aurélien GÉRÔME <ag@roxor.cx> and Adam Conrad <adconrad@0c3.net> for the Debian project (but may be used by others).