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Dd January 9, 2020
Dt PSRSET 8
Os
Sh NAME
Nm psrset
Nd control processor sets
Sh SYNOPSIS
Nm
Op Ar setid ...
Nm
Fl a Ar setid Ar cpuid Ar ...
Nm
Fl b Ar setid Ar pid Ar ...
Nm
Fl c Op Ar cpuid Ar ...
Nm
Fl d Ar setid
Nm
Fl e Ar setid Ar command
Nm
Fl i Op Ar setid ...
Nm
Fl p
Nm
Fl r Ar cpuid Ar ...
Nm
Fl u Ar pid Ar ...
Sh DESCRIPTION
The
Nm
command can be used to control and inspect processor sets.
Pp
The system always contains at least one processor set: the default
set.
The default set must contain at least one online processor (CPU) at
all times.
Pp
Where the system has symmetric multithreading (SMT), is is recommended that
CPUs representing different threads within a single core are not assigned to
different processor sets.
Pp
Available options:
Bl -tag -width indent
It Fl a
Assign one or more processors (CPUs) to the set
Ar setid .
In the current implementation, a CPU may only be present in one set.
CPU IDs are as reported and used by the
Xr cpuctl 8
command.
It Fl b
Bind one or more processes to the set
Ar setid .
All LWPs within the processes will be affected.
Bindings are inherited when new LWPs or processes are forked.
However, setting a new binding on a parent process does not affect the
bindings of its existing child processes.
It Fl c
Create a new processor set.
If successful, the ID of the new set will be printed.
If a list of CPU IDs is provided, those CPUs will be assigned to the set
upon creation.
Otherwise, the set will be created empty.
It Fl d
Delete the processor set specified by
Ar setid .
Any LWPs bound to the set will be re-bound to the default processor set.
It Fl e
Execute a command within the processor set specified by
Ar setid .
It Fl i
List all processor sets.
For each set, print the member CPUs.
If
Nm
is run without any options, it behaves as if
Fl i
were given.
It Fl p
List all CPUs.
For each CPU, print the associated processor set.
It Fl r
Remove a CPU from its current set, and return it back to the default
processor set.
It Fl u
Bind the specified processes to the system default processor set.
El
Sh SEE ALSO
Xr pset 3 ,
Xr cpuctl 8 ,
Xr schedctl 8
Sh HISTORY
The
Nm
command first appeared in
Nx 5.0 .
