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2 .\" Copyright (c) 2008 Jeffrey Roberson
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33 .Nd "configure processor sets"
51 .Op Fl j Ar jailid | Fl p Ar pid | Fl t Ar tid | Fl s Ar setid | Fl x Ar irq
55 .Op Fl d Ar domain | Fl j Ar jailid | Fl p Ar pid | Fl t Ar tid | Fl s Ar setid | Fl x Ar irq
59 command can be used to assign processor sets to processes, run commands
60 constrained to a given set or list of processors, and query information
61 about processor binding, sets, and available processors in the system.
64 requires a target to modify or query.
65 The target may be specified as a command, process id, thread id, a
66 cpuset id, an irq, a jail id, or a NUMA domain.
69 the target's set id or mask may be queried.
74 the target's CPU mask or set id may be set.
75 If no target is specified,
78 Not all combinations of operations and targets are supported.
80 you may not set the id of an existing set or query and launch a command
83 There are two sets applicable to each process and one private mask per thread.
84 Every process in the system belongs to a cpuset.
85 By default processes are started in set 1.
86 The mask or id may be queried using
88 Each thread also has a private mask of CPUs it is allowed to run
89 on that must be a subset of the assigned set.
90 And finally, there is a root set, numbered 0, that is immutable.
91 This last set is the list of all possible CPUs in the system and is
95 When running a command it may join a set specified with
97 otherwise a new set is created.
98 In addition, a mask for the command may be specified using
100 When used in conjunction with
102 the mask modifies the supplied or created set rather than the private mask
105 The options are as follows:
106 .Bl -tag -width ".Fl l Ar cpu-list"
108 Create a new cpuset and assign the target process to that set.
110 The requested operation should reference the cpuset available via the
113 Specifies a NUMA domain id as the target of the operation.
117 to print either a list of valid CPUs or, using
119 the id of the target.
123 option print the id rather than the valid mask of the target.
125 Specifies a jail id as the target of the operation.
127 Specifies a list of CPUs to apply to a target.
128 Specification may include
129 numbers separated by '-' for ranges and commas separating individual numbers.
132 may be specified in which case the list includes all CPUs from the root set.
134 Specifies a pid as the target of the operation.
136 Specifies a set id as the target of the operation.
138 The requested operation should reference the root set available via the
141 Specifies a thread id as the target of the operation.
143 Specifies an irq as the target of the operation.
148 Create a new group with CPUs 0-4 inclusive and run
151 .Dl cpuset -c -l 0-4 /bin/sh
153 Query the mask of CPUs the
155 is allowed to run on:
156 .Dl cpuset -g -p <sh pid>
160 to run on CPUs 0 and 2 while its group is still allowed to run on
162 .Dl cpuset -l 0,2 -p <sh pid>
166 belongs to restricting it to CPUs 0 and 2:
167 .Dl cpuset -l 0,2 -c -p <sh pid>
169 Modify the cpuset all threads are in by default to contain only
170 the first 4 CPUs, leaving the rest idle:
171 .Dl cpuset -l 0-3 -s 1
173 Print the id of the cpuset
176 .Dl cpuset -g -i -p <sh pid>
180 into the specified cpuset
182 so it may be managed with other pids in that set:
183 .Dl cpuset -s <setid> -p <pid>
185 Create a new cpuset that is restricted to CPUs 0 and 2 and move
188 .Dl cpuset -C -c -l 0,2 -p <pid>
194 command first appeared in
197 .An Jeffrey Roberson Aq Mt jeff@FreeBSD.org