Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
tools/workqueue/wq_dump.py: Add node_nr/max_active dump
Print out per-node nr/max_active numbers to improve visibility into
node_nr_active operations.
Signed-off-by: Tejun Heo <tj@kernel.org>
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tools/workqueue/wq_dump.py
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tools/workqueue/wq_dump.py
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from drgn.helpers.linux.list import list_for_each_entry,list_empty
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from drgn.helpers.linux.percpu import per_cpu_ptr
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from drgn.helpers.linux.cpumask import for_each_cpu,for_each_possible_cpu
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from drgn.helpers.linux.nodemask import for_each_node
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from drgn.helpers.linux.idr import idr_for_each
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import argparse
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WQ_AFFN_SYSTEM = prog['WQ_AFFN_SYSTEM']
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WQ_NAME_LEN = prog['WQ_NAME_LEN'].value_()
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cpumask_str_len = len(cpumask_str(wq_unbound_cpumask))
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print('Affinity Scopes')
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print(f' {wq.rescuer.task.pid.value_():6}', end='')
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print(f' {cpumask_str(wq.rescuer.task.cpus_ptr):{rcpus_len}}', end='')
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print('')
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print('')
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print('Unbound workqueue -> node_nr/max_active')
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print('=======================================')
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if 'node_to_cpumask_map' in prog:
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__cpu_online_mask = prog['__cpu_online_mask']
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node_to_cpumask_map = prog['node_to_cpumask_map']
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nr_node_ids = prog['nr_node_ids'].value_()
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print(f'online_cpus={cpumask_str(__cpu_online_mask.address_of_())}')
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for node in for_each_node():
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print(f'NODE[{node:02}]={cpumask_str(node_to_cpumask_map[node])}')
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print('')
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print(f'[{"workqueue":^{WQ_NAME_LEN-2}}\\ min max', end='')
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first = True
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for node in for_each_node():
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if first:
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print(f' NODE {node}', end='')
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first = False
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else:
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print(f' {node:7}', end='')
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print(f' {"dfl":>7} ]')
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print('')
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for wq in list_for_each_entry('struct workqueue_struct', workqueues.address_of_(), 'list'):
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if not (wq.flags & WQ_UNBOUND):
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continue
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print(f'{wq.name.string_().decode():{WQ_NAME_LEN}} ', end='')
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print(f'{wq.min_active.value_():3} {wq.max_active.value_():3}', end='')
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for node in for_each_node():
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nna = wq.node_nr_active[node]
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print(f' {nna.nr.counter.value_():3}/{nna.max.value_():3}', end='')
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nna = wq.node_nr_active[nr_node_ids]
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print(f' {nna.nr.counter.value_():3}/{nna.max.value_():3}')
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else:
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printf(f'node_to_cpumask_map not present, is NUMA enabled?')