Commit ab5e5b99 authored by Juri Lelli's avatar Juri Lelli Committed by Tejun Heo
Browse files

tools/workqueue: Add rescuers printing to wq_dump.py 



Retrieving rescuers information (e.g., affinity and name) is quite
useful when debugging workqueues configurations.

Add printing of such information to the existing wq_dump.py script.

Signed-off-by: default avatarJuri Lelli <juri.lelli@redhat.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 31c89007

tools/workqueue/wq_dump.py

+29 −0
Original line number Diff line number Diff line
@@ -175,3 +175,32 @@ for wq in list_for_each_entry('struct workqueue_struct', workqueues.address_of_( 
    if wq.flags & WQ_UNBOUND:

        print(f' {wq.dfl_pwq.pool.id.value_():{max_pool_id_len}}', end='')

    print('')



print('')

print('Workqueue -> rescuer')

print('=====================')

print(f'wq_unbound_cpumask={cpumask_str(wq_unbound_cpumask)}')

print('')

print('[    workqueue     \     type            unbound_cpumask     rescuer                  pid   cpumask]')



for wq in list_for_each_entry('struct workqueue_struct', workqueues.address_of_(), 'list'):

    print(f'{wq.name.string_().decode()[-24:]:24}', end='')

    if wq.flags & WQ_UNBOUND:

        if wq.flags & WQ_ORDERED:

            print(' ordered   ', end='')

        else:

            print(' unbound', end='')

            if wq.unbound_attrs.affn_strict:

                print(',S ', end='')

            else:

                print('   ', end='')

        print(f' {cpumask_str(wq.unbound_attrs.cpumask):24}', end='')

    else:

        print(' percpu    ', end='')

        print('                         ', end='')



    if wq.flags & WQ_MEM_RECLAIM:

        print(f' {wq.rescuer.task.comm.string_().decode()[-24:]:24}', end='')

        print(f' {wq.rescuer.task.pid.value_():5}', end='')

        print(f' {cpumask_str(wq.rescuer.task.cpus_ptr)}', end='')

    print('')