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| author | Jiangong.Han | 2021-06-22 18:37:08 +0800 |
|---|---|---|
| committer | Paul E. McKenney | 2021-07-27 11:39:30 -0700 |
| commit | 811192c5f24bfd7246ce9ce06f668d8c408bf39b (patch) | |
| tree | 4e4faa6ce8b334a463ca2c290911885eddbcecad /kernel/locking | |
| parent | 59e836662860a28880d45b35e1fbc5afca4847ce (diff) | |
rcuscale: Console output claims too few grace periods
The rcuscale console output claims N grace periods, numbered from zero
to N, which means that there were really N+1 grace periods. The root
cause of this bug is that rcu_scale_writer() stores the number of the
last grace period (numbered from zero) into writer_n_durations[me]
instead of the number of grace periods. This commit therefore assigns
the actual number of grace periods to writer_n_durations[me], and also
makes the corresponding adjustment to the loop outputting per-grace-period
measurements.
Sample of old console output:
rcu-scale: writer 0 gps: 133
......
rcu-scale: 0 writer-duration: 0 44003961
rcu-scale: 0 writer-duration: 1 32003582
......
rcu-scale: 0 writer-duration: 132 28004391
rcu-scale: 0 writer-duration: 133 27996410
Sample of new console output:
rcu-scale: writer 0 gps: 134
......
rcu-scale: 0 writer-duration: 0 44003961
rcu-scale: 0 writer-duration: 1 32003582
......
rcu-scale: 0 writer-duration: 132 28004391
rcu-scale: 0 writer-duration: 133 27996410
Signed-off-by: Jiangong.Han <jiangong.han@windriver.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/locking')
0 files changed, 0 insertions, 0 deletions