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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>
This commit is contained in:
Tejun Heo 2024-01-29 08:11:25 -10:00
parent 5797b1c189
commit 07daa99b7f
1 changed files with 40 additions and 1 deletions
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41
tools/workqueue/wq_dump.py
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@ -50,6 +50,7 @@ import drgn
from drgn.helpers.linux.list import list_for_each_entry,list_empty
from drgn.helpers.linux.percpu import per_cpu_ptr
from drgn.helpers.linux.cpumask import for_each_cpu,for_each_possible_cpu
from drgn.helpers.linux.nodemask import for_each_node
from drgn.helpers.linux.idr import idr_for_each
import argparse
@ -107,7 +108,6 @@ WQ_AFFN_NUMA = prog['WQ_AFFN_NUMA']
WQ_AFFN_SYSTEM = prog['WQ_AFFN_SYSTEM']
WQ_NAME_LEN = prog['WQ_NAME_LEN'].value_()
cpumask_str_len = len(cpumask_str(wq_unbound_cpumask))
print('Affinity Scopes')
@ -205,3 +205,42 @@ for wq in list_for_each_entry('struct workqueue_struct', workqueues.address_of_(
print(f' {wq.rescuer.task.pid.value_():6}', end='')
print(f' {cpumask_str(wq.rescuer.task.cpus_ptr):{rcpus_len}}', end='')
print('')
print('')
print('Unbound workqueue -> node_nr/max_active')
print('=======================================')
if 'node_to_cpumask_map' in prog:
__cpu_online_mask = prog['__cpu_online_mask']
node_to_cpumask_map = prog['node_to_cpumask_map']
nr_node_ids = prog['nr_node_ids'].value_()
print(f'online_cpus={cpumask_str(__cpu_online_mask.address_of_())}')
for node in for_each_node():
print(f'NODE[{node:02}]={cpumask_str(node_to_cpumask_map[node])}')
print('')
print(f'[{"workqueue":^{WQ_NAME_LEN-2}}\\ min max', end='')
first = True
for node in for_each_node():
if first:
print(f' NODE {node}', end='')
first = False
else:
print(f' {node:7}', end='')
print(f' {"dfl":>7} ]')
print('')
for wq in list_for_each_entry('struct workqueue_struct', workqueues.address_of_(), 'list'):
if not (wq.flags & WQ_UNBOUND):
continue
print(f'{wq.name.string_().decode():{WQ_NAME_LEN}} ', end='')
print(f'{wq.min_active.value_():3} {wq.max_active.value_():3}', end='')
for node in for_each_node():
nna = wq.node_nr_active[node]
print(f' {nna.nr.counter.value_():3}/{nna.max.value_():3}', end='')
nna = wq.node_nr_active[nr_node_ids]
print(f' {nna.nr.counter.value_():3}/{nna.max.value_():3}')
else:
printf(f'node_to_cpumask_map not present, is NUMA enabled?')