doc: simplify Linux paramter rcu_nocbs in PVP benchmark
From Documentation/admin-guide/kernel-parameters.txt, specifically the last sentence: nohz_full= [KNL,BOOT,SMP,ISOL] The argument is a cpu list, as described above. In kernels built with CONFIG_NO_HZ_FULL=y, set the specified list of CPUs whose tick will be stopped whenever possible. The boot CPU will be forced outside the range to maintain the timekeeping. Any CPUs in this list will have their RCU callbacks offloaded, just as if they had also been called out in the rcu_nocbs= boot parameter. The kernel or-s the nohz_full cpumask into the rcu_nocbs cpumask at startup, and uses that. Signed-off-by: Tudor Brindus <me@tbrindus.ca>
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@ -48,7 +48,7 @@ Host tuning
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.. code-block:: console
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intel_pstate=disable mce=ignore_ce default_hugepagesz=1G hugepagesz=1G hugepages=6 isolcpus=2-7 rcu_nocbs=2-7 nohz_full=2-7 iommu=pt intel_iommu=on
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intel_pstate=disable mce=ignore_ce default_hugepagesz=1G hugepagesz=1G hugepages=6 isolcpus=2-7 nohz_full=2-7 iommu=pt intel_iommu=on
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#. Disable hyper-threads at runtime if necessary or if BIOS is not accessible:
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@ -278,7 +278,7 @@ Guest tuning
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.. code-block:: console
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default_hugepagesz=1G hugepagesz=1G hugepages=1 intel_iommu=on iommu=pt isolcpus=1,2 rcu_nocbs=1,2 nohz_full=1,2
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default_hugepagesz=1G hugepagesz=1G hugepages=1 intel_iommu=on iommu=pt isolcpus=1,2 nohz_full=1,2
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#. Disable NMIs:
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