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Add a tuned-adm command for moving devices between plugin instances

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Resolves: RHEL-15141

Until now, this was only possible by manually sending a message to
TuneD via the DBus API.
This commit is contained in:
Pavol Žáčik 2023-11-08 18:33:27 +01:00
parent 370a80a065
commit f58c25d0bc
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GPG key ID: B99527D5E6487A92
4 changed files with 28 additions and 1 deletions
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11
man/tuned-adm.8
View file

@ -24,7 +24,7 @@
tuned\-adm - command line tool for switching between different tuning profiles
.SH SYNOPSIS
.B tuned\-adm
.RB [ list " | " active " | " "profile \fI[profile]\fP..." " | " "profile_info \fI[profile]\fP..." " | " off " | " auto_profile " | " profile_mode " | " "verify \fI[\-i | \-\-ignore\-missing]\fP" " | " recommend ]
.RB [ list " | " active " | " "profile \fI[profile]\fP..." " | " "profile_info \fI[profile]\fP..." " | " off " | " auto_profile " | " profile_mode " | " "verify \fI[\-i | \-\-ignore\-missing]\fP" " | " recommend " | " "instance_acquire_devices \fIdevices\fP \fIinstance\fP" ]
.SH DESCRIPTION
This command line utility allows you to switch between user definable tuning
@ -110,6 +110,15 @@ Enable automatic profile selection mode, switch to the recommended profile.
.B profile_mode
Show current profile selection mode.
.TP
.B "instance_acquire_devices \fIdevices\fP \fIinstance\fP"
Move all provided \fIdevices\fP under the given plugin \fIinstance\fP. The plugin
instance is identified using its name from the TuneD profile.
The devices are specified using a comma-separated list. When moving a set of CPUs,
it is possible to use the cpulist syntax by including the 'cpulist:' prefix.
For instance, 'cpulist:0,2-4' will move the devices cpu0, cpu1, cpu2, and cpu4.
.TP
.B off
Unload tunings.

5
tuned-adm.py
View file

@ -97,6 +97,11 @@ if __name__ == "__main__":
parser_profile_mode = subparsers.add_parser("profile_mode", help="show current profile selection mode")
parser_profile_mode.set_defaults(action="profile_mode")
parser_instance_acquire_devices = subparsers.add_parser("instance_acquire_devices", help="acquire devices from other instances and assign them to the given instance")
parser_instance_acquire_devices.set_defaults(action="instance_acquire_devices")
parser_instance_acquire_devices.add_argument("devices", metavar="devices", type=str, help="comma-separated list of device names; may use the cpulist syntax if prefixed with 'cpulist:'")
parser_instance_acquire_devices.add_argument("instance", metavar="instance", type=str, help="name of the plugin instance which should acquire the devices")
args = parser.parse_args(sys.argv[1:])
options = vars(args)

10
tuned/admin/admin.py
View file

@ -439,3 +439,13 @@ class Admin(object):
def _action_list_plugins(self, verbose=False):
print("Not supported in no_daemon mode.")
return False
def _action_dbus_instance_acquire_devices(self, devices, instance):
(ret, msg) = self._controller.instance_acquire_devices(devices, instance)
if not ret:
self._error("Unable to acquire devices: %s" % msg)
return self._controller.exit(ret)
def _action_instance_acquire_devices(self, devices, instance):
print("Not supported in no_daemon mode.")
return False

3
tuned/admin/dbus_controller.py
View file

@ -163,6 +163,9 @@ class DBusController(object):
"""
return self._call("get_plugin_hints", plugin_name)
def instance_acquire_devices(self, devices, instance):
return self._call("instance_acquire_devices", devices, instance)
def exit(self, ret):
self.set_action(None)
self._ret = ret