On Mon, 2 May 2022 12:54:14 +0530 Pavan Nikhilesh <pbhagavat...@marvell.com> wrote:
> Update Linux core isolation guide to include isolation from > timers, rcu processing and IRQs. > > Signed-off-by: Pavan Nikhilesh <pbhagavat...@marvell.com> > --- > doc/guides/linux_gsg/enable_func.rst | 10 +++++----- > 1 file changed, 5 insertions(+), 5 deletions(-) > > diff --git a/doc/guides/linux_gsg/enable_func.rst > b/doc/guides/linux_gsg/enable_func.rst index 1df3ab0255..f567c713e6 > 100644 --- a/doc/guides/linux_gsg/enable_func.rst > +++ b/doc/guides/linux_gsg/enable_func.rst > @@ -90,16 +90,16 @@ Using Linux Core Isolation to Reduce Context > Switches ----------------------------------------------------- > > While the threads used by a DPDK application are pinned to logical > cores on the system, -it is possible for the Linux scheduler to run > other tasks on those cores also. -To help prevent additional > workloads from running on those cores, -it is possible to use the > ``isolcpus`` Linux kernel parameter to isolate them from the general > Linux scheduler. +it is possible for the Linux scheduler to run other > tasks on those cores. +To help prevent additional workloads, timers, > rcu processing and IRQs from running on those cores, it is possible > to use +the Linux kernel parameters ``isolcpus``, ``nohz_full``, > ``irqaffinity`` to isolate them from the general Linux scheduler > tasks. -For example, if DPDK applications are to run on logical cores > 2, 4 and 6, +For example, if a given CPU has 0-7 cores and DPDK > applications are to run on logical cores 2, 4 and 6, the following > should be added to the kernel parameter list: .. code-block:: console > - isolcpus=2,4,6 > + isolcpus=2,4,6 nohz_full=2,4,6 irqaffinity=0,1,3,5,7 > > .. _High_Precision_Event_Timer: > Also cgroups is often a better solution than the kernel command line. There are also caveats around some of these settings so worth reading the kernel documentation.
