Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Changes to speed up qvm-ls #36

Open
wants to merge 6 commits into
base: master
Choose a base branch
from
Open

Changes to speed up qvm-ls #36

Show file tree
Hide file tree
Changes from 1 commit
Commits
Show all changes
6 commits
Select commit Hold shift + click to select a range
5f152d4
Use GetAll instead of Get and cache property values
qubesuser Nov 8, 2017
7644ea9
cache VM state from List/GetAllData instead of requesting it every time
qubesuser Nov 9, 2017
9e1a0bd
qvm-ls: use GetAllData
qubesuser Nov 9, 2017
6eb828f
don't lookup list of labels just to read VM properties
qubesuser Nov 9, 2017
10c4c2f
don't use ast.literal_eval, just directly convert to the desired type
qubesuser Nov 9, 2017
671150d
remove spinner code
qubesuser Nov 9, 2017
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
5 changes: 4 additions & 1 deletion qubesadmin/app.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -146,9 +146,12 @@ def __getitem__(self, item):
# done by 'item not in self' check above, unless blind_mode is
# enabled
klass = None
state = None
if self._vm_list and item in self._vm_list:
klass = self._vm_list[item]['class']
self._vm_objects[item] = cls(self.app, item, klass=klass)
state = self._vm_list[item]['state']
self._vm_objects[item] = cls(self.app, item,
klass=klass, state=state)
return self._vm_objects[item]

def __contains__(self, item):
Expand Down
38 changes: 22 additions & 16 deletions qubesadmin/vm/__init__.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -46,7 +46,7 @@ class QubesVM(qubesadmin.base.PropertyHolder):

firewall = None

def __init__(self, app, name, klass=None):
def __init__(self, app, name, klass=None, state=None):
super(QubesVM, self).__init__(app, 'admin.vm.property.', name)
self._volumes = None
self._klass = klass
Expand All @@ -55,6 +55,11 @@ def __init__(self, app, name, klass=None):
self.features = qubesadmin.features.Features(self)
self.devices = qubesadmin.devices.DeviceManager(self)
self.firewall = qubesadmin.firewall.Firewall(self)
self._state = state

def clear_cache(self):
self._state = None
super(QubesVM, self).clear_cache()

@property
def name(self):
Expand Down Expand Up @@ -138,7 +143,7 @@ def unpause(self):
'''
self.qubesd_call(self._method_dest, 'admin.vm.Unpause')

def get_power_state(self):
def get_power_state(self, force=False):
'''Return power state description string.

Return value may be one of those:
Expand Down Expand Up @@ -168,20 +173,21 @@ def get_power_state(self):

'''

try:
vm_list_info = [line
for line in self.qubesd_call(
self._method_dest, 'admin.vm.List', None, None
).decode('ascii').split('\n')
if line.startswith(self._method_dest+' ')]
except qubesadmin.exc.QubesDaemonNoResponseError:
return 'NA'
assert len(vm_list_info) == 1
# name class=... state=... other=...
# NOTE: when querying dom0, we get whole list
vm_state = vm_list_info[0].strip().partition('state=')[2].split(' ')[0]
return vm_state

if not self._state or force:
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Ouch, this will break all the long-running processes using vm.is_running() or such. One example is qvm-shutdown --wait. IMO caching of VM state should be opt-in, not opt-out.

try:
vm_list_info = [line
for line in self.qubesd_call(
self._method_dest, 'admin.vm.List', None, None
).decode('ascii').split('\n')
if line.startswith(self._method_dest+' ')]
except qubesadmin.exc.QubesDaemonNoResponseError:
return 'NA'
assert len(vm_list_info) == 1
# name class=... state=... other=...
# NOTE: when querying dom0, we get whole list
self._state = (vm_list_info[0].strip().partition('state=')[2]
.split(' ')[0])
return self._state

def is_halted(self):
''' Check whether this domain's state is 'Halted'
Expand Down