taskpolicy —
execute a program with an altered I/O or scheduling policy
or change settings of already running process
taskpolicy |
[-d policy]
[-g policy]
[-c clamp]
[-b] [-t
thruput_tier] [-l
latency_tier] [-a]
[-s] [-S
shims] [-m
limit] [-j
pri] program
[arg1 [...]] |
taskpolicy |
[-b|-B] [-t
thruput_tier] [-l
latency_tier] [-p
pid] |
The taskpolicy program uses the
setiopolicy_np(3) and setpriority(2)
APIs to execute a program with altered I/O or scheduling policies. All
children of the specified program also inherit these policies.
taskpolicy accepts the following flags and
arguments:
-d
policy- Run the program after calling setiopolicy_np(3) with an
iotype of IOPOL_TYPE_DISK, a scope of IOPOL_SCOPE_PROCESS, and the
specified policy. The argument can either be an integer, or a symbolic
string like "default" or "throttle", which is
interpreted case-insensitively.
-g
policy- Run the program after calling setiopolicy_np(3) with an
iotype of IOPOL_TYPE_DISK, a scope of IOPOL_SCOPE_DARWIN_BG, and the
specified policy. The argument is interpreted in the same manner as
-d.
-c
clamp- Run the program using the specified QoS clamp. The argument can be either
"utility", "background", or "maintenance",
which is interpreted case-insensitively.
-p
pid- Change settings for the process specified by
pid.
-m
limit- Run the program with specified memory limit (in MiB).
-j
pri- Run the program at the specified jetsam priority.
-P
pcontrol- Run the program with the specified process control action, which may be
invoked by the system upon resource exhaustion. Valid options include
"kill", "throttle", and "suspend".
-S
shims- Run the program with security transition shims in effect.
-b- Run the program after calling setpriority(2) with a
priority of PRIO_DARWIN_BG.
-B- Move target process out of PRIO_DARWIN_BG.
-t- Set throughput tier of the process to
thruput_tier.
-l- Set latency tier of the process to
latency_tier.
-a- Run the program with the resource management policies given to
applications.
-s- Run the program with an initial suspended state by calling
posix_spawnattr_setflags(3) with
POSIX_SPAWN_START_SUSPENDED.