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| author | Ingo Molnar <mingo@kernel.org> | 2017-04-27 07:41:37 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-04-27 07:41:37 +0200 |
| commit | 96fd20cf3f1620d699db43cd08745f1e57e1072a (patch) | |
| tree | 88b0caa1cd8bfa66e6a4b00ad21108f03369eb03 /samples/bpf/map_perf_test_user.c | |
| parent | d160a727c40e7175aa642137910a3fda46262fc8 (diff) | |
| parent | 22607d66bbc3e81140d3bcf08894f4378eb36428 (diff) | |
| download | linux-96fd20cf3f1620d699db43cd08745f1e57e1072a.tar.bz2 | |
Merge branch 'rcu/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
Pull RCU updates from Paul E. McKenney:
"This series greatly reduces the performance degradation of Tree SRCU
on a CPU-hotplug stress test. The effect was not subtle: Mike Galbraith
measured Classic SRCU at 55 seconds and Tree SRCU at more than 16 -minutes-
for this test. Mike collected ftrace data that showed that Classic SRCU
was auto-expediting invocations of synchronize_srcu() that found SRCU
completely idle. This series therefore adds this auto-expedite capability
to Tree SRCU, bringing the performance shortfall to less than ten seconds,
which is a great improvement over the initial shortfall of 15 minutes."
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'samples/bpf/map_perf_test_user.c')
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