| #!/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}" |
