psrset —
control processor sets
psrset |
-a setid
cpuid ... |
The psrset command can be used to control and inspect
processor sets.
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.
Available options:
-a- Assign one or more processors (CPUs) to the set
setid. In the current implementation, a CPU may only
be present in one set. CPU IDs are as reported and used by the
cpuctl(8) command.
-b- Bind one or more processes to the set 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.
-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.
-d- Delete the processor set specified by setid. Any
LWPs bound to the set will be re-bound to the default processor set.
-e- Execute a command within the processor set specified by
setid.
-i- List all processor sets. For each set, print the member CPUs. If
psrset is run without any options, it behaves as
if -i were given.
-p- List all CPUs. For each CPU, print the associated processor set.
-r- Remove a CPU from its current set, and return it back to the default
processor set.
-u- Bind the specified processes to the system default processor set.
The psrset command first appeared in
NetBSD 5.0.