TUNA(8) System Administration Utilities TUNA(8)NAMEtuna - program for tuning running processes
SYNOPSIStuna [OPTIONS]
DESCRIPTION
This manual page explains the tuna program. The program can be used to
change the attributes of application and kernel threads. The tuna can
operate on IRQs by name or number, and tasks or threads by process ID
or command-line. CPUs and sets of CPUs can be specified by CPU or
socket number. IRQ names and process command-lines can include wild‐
cards.
tuna can change scheduling policy, scheduler priority and processor
affinity for processes and process threads. tuna can also change the
processor affinity for interrupts. When tuna is invoked without any
options it starts up in its graphical interface mode. This manual page
explains only the command-line options for tunaOPTIONStuna has both action options and modifier options. Modifier options
must be specified on the command-line before the actions they are
intended to modify. Any modifier option applies to following actions on
the same command-line until it is over-ridden.
Actions
-h, --help
Print a list of options. tuna will exit after this action,
ignoring the remainder of the command-line.
-g, --gui
Start the GUI. Actions that follow this on the command-line will
be processed without waiting for the GUI to complete.
-a, --config_file_apply=profilename
Apply changes described in profile
-l, --config_file_list
List preloaded profiles
-i, --isolate
Move all threads away from CPU-LIST. Requires -c or -S.
-I, --include
Allow all threads to run on CPU-LIST. Requires -c or -S.
-m, --move
Move selected entities to CPU-LIST. Requires -c and either -t or
-q.
-p, --priority=[POLICY:]RTPRIO
Set thread scheduler tunables: POLICY and RTPRIO. POLICY is one
of OTHER, FIFO, RR, or BATCH. Requires -t.
-P, --show_threads
Show thread list.
-s, --save=FILENAME
Save kthreads sched tunables to FILENAME.
-v, --version
Show version
-W, --what_is
Provides help about selected entities. Requires -t.
-x, --spread
Spread selected entities over CPU-LIST. Requires at least one of
-t or -q. The specified threads and IRQs are each assigned to
one cpu in CPU-LIST.
Modifiers
-c, --cpus=CPU-LIST
CPU-LIST affected by commands. Requires a CPU number or a comma-
separated list of CPU numbers.
-C, --affect_children
Operation will affect children threads.
-f, --filter
Disable display of selected CPUs in --gui. Requires -c
-G, --cgroup
Display the processes with the type of cgroups they are in.
Requires -P
-K, --no_kthreads
Operations will not affect kernel threads.
-q, --irqs=IRQ-LIST
IRQ-LIST affected by commands. Requires an IRQ number or a
comma-separated list of IRQ numbers.
-S, --sockets=CPU-SOCKET-LIST
CPU-SOCKET-LIST affected by commands. Requires a socket number
or a comma-separated list of socket numbers.
-t, --threads=THREAD-LIST
THREAD-LIST affected by commands. Requires a thread number or
thread name, or a comma-separated list of thread numbers and/or
names. Thread names may contain wildcards. Be sure to quote or
escape any wildcard specifications.
-U, --no_uthreads
Operations will not affect user threads.
USAGE EXAMPLES
If for instance the Ethernet NICs have multiple queues for both receive
and transmit, each with its own IRQ, the Ethernet IRQs can be associ‐
ated with a CPU socket:
tuna-S 2 -i -q 'eth*' -x
Move everything off the CPUs in socket 2, then spread the IRQs
for the Ethernet devices acrross those same CPUs.
tuna February 2010 TUNA(8)
