From: Pavan Nikhilesh <pbhagavatula@marvell.com>
To: <jerinj@marvell.com>
Cc: <dev@dpdk.org>, Pavan Nikhilesh <pbhagavatula@marvell.com>
Subject: [PATCH] doc: update Linux core isolation guide
Date: Mon, 2 May 2022 12:54:14 +0530 [thread overview]
Message-ID: <20220502072414.4643-1-pbhagavatula@marvell.com> (raw)
Update Linux core isolation guide to include isolation from
timers, rcu processing and IRQs.
Signed-off-by: Pavan Nikhilesh <pbhagavatula@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:
--
2.25.1
next reply other threads:[~2022-05-02 7:24 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-02 7:24 Pavan Nikhilesh [this message]
2022-05-02 20:17 ` Stephen Hemminger
2022-05-10 15:50 ` [EXT] " Pavan Nikhilesh Bhagavatula
2022-05-17 18:08 ` [PATCH v2] " pbhagavatula
2022-05-17 18:22 ` Stephen Hemminger
2022-05-17 18:32 ` [EXT] " Pavan Nikhilesh Bhagavatula
2022-05-17 19:59 ` [PATCH v3] " pbhagavatula
2022-06-02 7:47 ` Jerin Jacob
2022-07-11 20:59 ` Thomas Monjalon
2022-10-31 11:57 ` [PATCH v4] " pbhagavatula
2022-11-15 15:57 ` Thomas Monjalon
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