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SubjectRe: [PATCH v4 3/4] writeback: add wb_monitor.py script to monitor writeback info on bdi
On Tue, Apr 23, 2024 at 12:48:07AM +0800, Kemeng Shi wrote:
> Add wb_monitor.py script to monitor writeback information on backing dev
> which makes it easier and more convenient to observe writeback behaviors
> of running system.
>
> The wb_monitor.py script is written based on wq_monitor.py.
>
> Following domain hierarchy is tested:
> global domain (320G)
> / \
> cgroup domain1(10G) cgroup domain2(10G)
> | |
> bdi wb1 wb2
>
> The wb_monitor.py script output is as following:
> ./wb_monitor.py 252:16 -c
> writeback reclaimable dirtied written avg_bw
> 252:16_1 0 0 0 0 102400
> 252:16_4284 672 820064 9230368 8410304 685612
> 252:16_4325 896 819840 10491264 9671648 652348
> 252:16 1568 1639904 19721632 18081952 1440360
>
> writeback reclaimable dirtied written avg_bw
> 252:16_1 0 0 0 0 102400
> 252:16_4284 672 820064 9230368 8410304 685612
> 252:16_4325 896 819840 10491264 9671648 652348
> 252:16 1568 1639904 19721632 18081952 1440360
> ...
>
> Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
> Suggested-by: Tejun Heo <tj@kernel.org>

Acked-by: Tejun Heo <tj@kernel.org>

Thanks.

--
tejun

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