Bug 1943291
| Summary: | Tuned plugin_net dumps a traceback while adjusting the netdev queue count | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 8 | Reporter: | Nitesh Narayan Lal <nilal> |
| Component: | tuned | Assignee: | Jaroslav Škarvada <jskarvad> |
| Status: | CLOSED ERRATA | QA Contact: | Robin Hack <rhack> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 8.4 | CC: | jeder, jskarvad, jzerdik, rhack |
| Target Milestone: | rc | Keywords: | Patch, TestCaseProvided, Triaged, Upstream |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | tuned-2.16.0-0.1.rc1.el8 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-11-09 19:58:24 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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'): Upstream PR: https://github.com/redhat-performance/tuned/pull/336 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: