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realtime: use skew_tick=1 in kernel cmdline

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By default the timer tick will fire at the same time on all
CPUs. This causes the jiffies_lock to get contended in the
real-time kernel, as it's a raw spinlock. skew_tick=1 causes
the timer tick to fire at different times on all CPUs,
fixing the contention.

Note skew_tick=1 usage is going to be propagated to the
NFV profiles as well.

Resolves: rhbz#1447938

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Luiz Capitulino 2017-05-15 12:03:54 -04:00 committed by Jaroslav Škarvada
parent fdff5f15b9
commit 9bc020df37
1 changed files with 1 additions and 1 deletions
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profiles/realtime/tuned.conf
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@ -36,7 +36,7 @@ kernel.timer_migration = 0
/sys/devices/system/machinecheck/machinecheck*/ignore_ce = 1
[bootloader]
cmdline=isolcpus=${isolated_cores} intel_pstate=disable nosoftlockup
cmdline=isolcpus=${isolated_cores} intel_pstate=disable nosoftlockup skew_tick=1
[script]
script = ${i:PROFILE_DIR}/script.sh