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| author | Paul E. McKenney <paulmck@kernel.org> | 2024-05-08 21:43:56 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2024-06-06 11:44:42 -0700 |
| commit | 0ac55d095d375e84fcdac5e51011613734e57854 (patch) | |
| tree | bf5c056e143ea5215345184579007d36ce4cd71d /Documentation/RCU | |
| parent | b9f147cdc2c0bf54ca2c25ed185806f1fc6da65f (diff) | |
| download | linux-0ac55d095d375e84fcdac5e51011613734e57854.tar.gz linux-0ac55d095d375e84fcdac5e51011613734e57854.tar.bz2 linux-0ac55d095d375e84fcdac5e51011613734e57854.zip | |
tools/rcu: Add rcu-updaters.sh script
This commit adds a tools/rcu/rcu-updaters.sh script that uses bpftrace
to print a histogram of the RCU update-side primitives invoked during
the specified time interval, or until manually terminated if no interval
is specified.
Sample output on an idle laptop:
@counts[poll_state_synchronize_rcu]: 6
@counts[synchronize_srcu]: 13
@counts[call_rcu_tasks_trace]: 25
@counts[synchronize_rcu]: 54
@counts[kvfree_call_rcu]: 428
@counts[call_rcu]: 2134
Note that when run on a kernel missing one or more of the symbols, this
script will issue a diagnostic for each that is not found, but continue
normally for the rest of the functions.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'Documentation/RCU')
0 files changed, 0 insertions, 0 deletions