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Change-Id: I37ade764d873c701b35eac5881eb40412ba64a86
Story: 2002801
Task: 22687
Signed-off-by: Scott Little <scott.little@windriver.com>
69 lines
2.2 KiB
Diff
69 lines
2.2 KiB
Diff
From 0e264e7ac2b311aa9b42b183660a07b7e4e36b11 Mon Sep 17 00:00:00 2001
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From: Jim Gauld <james.gauld@windriver.com>
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Date: Fri, 9 Jun 2017 14:58:23 -0400
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Subject: [PATCH 1/1] CGTS-7164: Add resource options cpu-mask to affine drbd
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kernel threads
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This adds "options { cpu-mask <cpumask>; }" section to DRBD resource
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configuration if 'cpumask' hexstring is defined. This governs kernel
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threads: drbd_w_<x>, drbd_r_<x>, drbd_a_<x>.
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Related notes:
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- if cpumask is not specified, the kernel threads drbd_w_<x>, drbd_r_<x>,
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drbd_a_<x>, and drbd_as_<x> are affined to individual cores, each <x>
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on a different core.
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- the remainder of the kernel threads are governed by kernel boot
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argument kthread_cpus=<cpulist>. i.e., drbd-reissue, drbd<x>_submit,
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jbd2/drbd<x>-8, drbd_as_<x>.
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- the drbd_a_<x> and drbd_as_<x> show up when DRBD is duplex.
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- the drbd_a_<x> threads have SCHED_RR scheduling policy.
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---
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manifests/resource.pp | 3 +++
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templates/header.res.erb | 6 ++++++
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2 files changed, 9 insertions(+)
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diff --git a/manifests/resource.pp b/manifests/resource.pp
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index d19ad8b..17e6142 100644
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--- a/manifests/resource.pp
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+++ b/manifests/resource.pp
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@@ -26,6 +26,8 @@
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# [link_speed] replication link network speed mbps
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# [num_parallel] number of parallel drbd filesystems to sync
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# [rtt_ms] round-trip-time milliseconds (i.e., ping between replication nodes)
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+# [cpumask] cpu-affinity-mask for DRBD kernel threads (hexidecimal notation).
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+# 0 means spread over all CPUs of the machine.
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define drbd::resource (
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$host1 = undef,
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$host2 = undef,
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@@ -48,6 +50,7 @@ define drbd::resource (
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$num_parallel = false,
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$rtt_ms = false,
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$resync_after = undef,
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+ $cpumask = false,
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$net_parameters = false,
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$manage = true,
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$ha_primary = false,
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diff --git a/templates/header.res.erb b/templates/header.res.erb
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index be53761..df52544 100644
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--- a/templates/header.res.erb
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+++ b/templates/header.res.erb
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@@ -29,6 +29,12 @@ resource <%= @name %> {
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<% end -%>
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}
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+<% if @cpumask -%>
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+ options {
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+ cpu-mask <%= @cpumask %>;
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+ }
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+<% end -%>
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+
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net {
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after-sb-0pri discard-zero-changes;
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after-sb-1pri discard-secondary;
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--
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1.8.3.1
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