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DescriptionNitesh Narayan Lal
2021-03-25 18:00:06 UTC
Description of problem:
Tuned prints a traceback while adjusting the network device queue count.
Version-Release number of selected component (if applicable):
tuned-2.15.0-2.el8.noarch
How reproducible:
Every time
Steps to Reproduce:
1. Bring up a rhel8.4 host
2. Apply tuned's realtime-virtual-host profile by isolating CPUs
3. Reboot and check tuned.log or run tuned-adm -l debug profile realtime-virtual-host
Actual results:
WARNING tuned.profiles.functions.function_check_net_queue_count: net-dev queue count is not correctly specified, setting it to HK CPUs 12
ERROR tuned.units.manager: BUG: Unhandled exception in start_tuning: invalid literal for int() with base 10: 'n/a'
ERROR tuned.units.manager: Traceback (most recent call last):
File "/usr/lib/python3.6/site-packages/tuned/units/manager.py", line 119, in _try_call
return f(*args, **kwargs)
File "/usr/lib/python3.6/site-packages/tuned/plugins/instance/instance.py", line 78, in apply_tuning
self._plugin.instance_apply_tuning(self)
File "/usr/lib/python3.6/site-packages/tuned/plugins/base.py", line 261, in instance_apply_tuning
self._instance_apply_static(instance)
File "/usr/lib/python3.6/site-packages/tuned/plugins/base.py", line 318, in _instance_apply_static
self._execute_all_device_commands(instance, instance.assigned_devices)
File "/usr/lib/python3.6/site-packages/tuned/plugins/base.py", line 441, in _execute_all_device_commands
self._execute_device_command(instance, command, device, new_value)
File "/usr/lib/python3.6/site-packages/tuned/plugins/base.py", line 502, in _execute_device_command
command["custom"](True, new_value, device, False, False)
File "/usr/lib/python3.6/site-packages/tuned/plugins/plugin_net.py", line 470, in _channels
return self._custom_parameters("channels", start, value, device, verify)
File "/usr/lib/python3.6/site-packages/tuned/plugins/plugin_net.py", line 425, in _custom_parameters
dev_params = params_current)
File "/usr/lib/python3.6/site-packages/tuned/plugins/plugin_net.py", line 400, in _set_device_parameters
if context == "channels" and int(dev_params[next(iter(d))]) == 0:
ValueError: invalid literal for int() with base 10: 'n/a'
Expected results:
Tuned should adjust the network device queue count without any stack trace
Additional info:
Comment 1Nitesh Narayan Lal
2021-03-25 18:10:30 UTC
What happens here is that in rhel8.4 the mode that a network device doesn't
support is represented by 'n/a' instead of 0:
[root@virtlab512 ~]# ethtool -l eno1
Channel parameters for eno1:
Pre-set maximums:
RX: 4
TX: 4
Other: n/a
Combined: n/a -> Not supported mode by eno1
Current hardware settings:
RX: 4
TX: 1
Other: n/a
Combined: n/a
In previous kernels this used to be 0:
[root@virtlab719 ~]# ethtool -l p3p1
Channel parameters for p3p1:
Pre-set maximums:
RX: 0 -> Not supported mode by p3p1
TX: 0 -> Not supported mode by p3p1
Other: 1
Combined: 80
Current hardware settings:
RX: 0
TX: 0
Other: 1
Combined: 4
Because of this the plugin_net script fails when it tries to do
"int(dev_params[next(iter(d))])" for checking whether the command adjustment
is required or not:
# replace the channel parameters based on the device support
if context == "channels" and int(dev_params[next(iter(d))]) == 0:
One possible fix for this is to replace the above with the following:
if context == "channels" and (dev_params[next(iter(d))] == 0 or dev_params[next(iter(d))] == 'n/a'):
Comment 3Jaroslav Škarvada
2021-04-15 22:31:55 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (tuned bug fix and enhancement update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2021:4476
Description of problem: Tuned prints a traceback while adjusting the network device queue count. Version-Release number of selected component (if applicable): tuned-2.15.0-2.el8.noarch How reproducible: Every time Steps to Reproduce: 1. Bring up a rhel8.4 host 2. Apply tuned's realtime-virtual-host profile by isolating CPUs 3. Reboot and check tuned.log or run tuned-adm -l debug profile realtime-virtual-host Actual results: WARNING tuned.profiles.functions.function_check_net_queue_count: net-dev queue count is not correctly specified, setting it to HK CPUs 12 ERROR tuned.units.manager: BUG: Unhandled exception in start_tuning: invalid literal for int() with base 10: 'n/a' ERROR tuned.units.manager: Traceback (most recent call last): File "/usr/lib/python3.6/site-packages/tuned/units/manager.py", line 119, in _try_call return f(*args, **kwargs) File "/usr/lib/python3.6/site-packages/tuned/plugins/instance/instance.py", line 78, in apply_tuning self._plugin.instance_apply_tuning(self) File "/usr/lib/python3.6/site-packages/tuned/plugins/base.py", line 261, in instance_apply_tuning self._instance_apply_static(instance) File "/usr/lib/python3.6/site-packages/tuned/plugins/base.py", line 318, in _instance_apply_static self._execute_all_device_commands(instance, instance.assigned_devices) File "/usr/lib/python3.6/site-packages/tuned/plugins/base.py", line 441, in _execute_all_device_commands self._execute_device_command(instance, command, device, new_value) File "/usr/lib/python3.6/site-packages/tuned/plugins/base.py", line 502, in _execute_device_command command["custom"](True, new_value, device, False, False) File "/usr/lib/python3.6/site-packages/tuned/plugins/plugin_net.py", line 470, in _channels return self._custom_parameters("channels", start, value, device, verify) File "/usr/lib/python3.6/site-packages/tuned/plugins/plugin_net.py", line 425, in _custom_parameters dev_params = params_current) File "/usr/lib/python3.6/site-packages/tuned/plugins/plugin_net.py", line 400, in _set_device_parameters if context == "channels" and int(dev_params[next(iter(d))]) == 0: ValueError: invalid literal for int() with base 10: 'n/a' Expected results: Tuned should adjust the network device queue count without any stack trace Additional info: