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>

diff --git a/doc/guides/howto/pvp_reference_benchmark.rst b/doc/guides/howto/pvp_reference_benchmark.rst
index 484de3b7db2bfb0c98fed35600cf8b9fc146a816..1043356b3d915903d2b87e85fa37ef60cc9803d6 100644 (file)
--- a/doc/guides/howto/pvp_reference_benchmark.rst
+++ b/doc/guides/howto/pvp_reference_benchmark.rst
@@ -48,7 +48,7 @@ Host tuning
 
    .. code-block:: console
 
-      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
+      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
 
 #. Disable hyper-threads at runtime if necessary or if BIOS is not accessible:
 
@@ -278,7 +278,7 @@ Guest tuning
 
    .. code-block:: console
 
-      default_hugepagesz=1G hugepagesz=1G hugepages=1 intel_iommu=on iommu=pt isolcpus=1,2 rcu_nocbs=1,2 nohz_full=1,2
+      default_hugepagesz=1G hugepagesz=1G hugepages=1 intel_iommu=on iommu=pt isolcpus=1,2 nohz_full=1,2
 
 #. Disable NMIs: