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- #!/bin/sh
- # SPDX-License-Identifier: GPL-2.0+
- #
- # Run bpftrace to obtain a histogram of the types of primitives used to
- # initiate RCU grace periods. The count associated with rcu_gp_init()
- # is the number of normal (non-expedited) grace periods.
- #
- # Usage: rcu-updaters.sh [ duration-in-seconds ]
- #
- # Note that not all kernel builds have all of these functions. In those
- # that do not, this script will issue a diagnostic for each that is not
- # found, but continue normally for the rest of the functions.
- duration=${1}
- if test -n "${duration}"
- then
- exitclause='interval:s:'"${duration}"' { exit(); }'
- else
- echo 'Hit control-C to end sample and print results.'
- fi
- bpftrace -e 'kprobe:kvfree_call_rcu,
- kprobe:call_rcu,
- kprobe:call_rcu_tasks,
- kprobe:call_rcu_tasks_trace,
- kprobe:call_srcu,
- kprobe:rcu_barrier,
- kprobe:rcu_barrier_tasks,
- kprobe:rcu_barrier_tasks_trace,
- kprobe:srcu_barrier,
- kprobe:synchronize_rcu,
- kprobe:synchronize_rcu_expedited,
- kprobe:synchronize_rcu_tasks,
- kprobe:synchronize_rcu_tasks_rude,
- kprobe:synchronize_rcu_tasks_trace,
- kprobe:synchronize_srcu,
- kprobe:synchronize_srcu_expedited,
- kprobe:get_state_synchronize_rcu,
- kprobe:get_state_synchronize_rcu_full,
- kprobe:start_poll_synchronize_rcu,
- kprobe:start_poll_synchronize_rcu_expedited,
- kprobe:start_poll_synchronize_rcu_full,
- kprobe:start_poll_synchronize_rcu_expedited_full,
- kprobe:poll_state_synchronize_rcu,
- kprobe:poll_state_synchronize_rcu_full,
- kprobe:cond_synchronize_rcu,
- kprobe:cond_synchronize_rcu_full,
- kprobe:start_poll_synchronize_srcu,
- kprobe:poll_state_synchronize_srcu,
- kprobe:rcu_gp_init
- { @counts[func] = count(); } '"${exitclause}"
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