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author | 2012-02-16 21:59:33 -0800 | |
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committer | 2012-02-21 09:42:30 -0800 | |
commit | 696a02cc16b182dd78b1f395ae336f449cc90f11 (patch) | |
tree | 5411af06d52a3f567e6b3fe592128d3fc0306be1 /tools/perf/scripts/python/export-to-postgresql.py | |
parent | rcu: Eliminate softirq-mediated RCU_FAST_NO_HZ idle-entry loop (diff) | |
download | linux-dev-696a02cc16b182dd78b1f395ae336f449cc90f11.tar.xz linux-dev-696a02cc16b182dd78b1f395ae336f449cc90f11.zip |
rcu: Hold off RCU_FAST_NO_HZ after timer posted
This commit handles workloads that transition quickly between idle and
non-idle, and where the CPU's callbacks cannot be invoked, but where
RCU does not have anything immediate for the CPU to do. Without this
patch, the RCU_FAST_NO_HZ code can be invoked repeatedly on each entry
to idle. The commit sets the per-CPU rcu_dyntick_holdoff variable to
hold off further attempts for a tick.
Reported-by: "Abou Gazala, Neven M" <neven.m.abou.gazala@intel.com>
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions