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Lack of visibility has always been a pain point for workqueues. While the recently added wq_monitor.py improved the situation, it's still difficult to understand what worker pools are active in the system, how workqueues map to them and why. The lack of visibility into how workqueues are configured is going to become more noticeable as workqueue improves locality awareness and provides more mechanisms to customize locality related behaviors. Now that the basic framework for more flexible locality support is in place, this is a good time to improve the situation. This patch adds tools/workqueues/wq_dump.py which prints out the topology configuration, worker pools and how workqueues are mapped to pools. Read the command's help message for more details. Signed-off-by: Tejun Heo <tj@kernel.org> |
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