Merge pull request #850 from MarSik/master

Enable timer migration

Author: openshift-merge-robot

build/assets/tuned/openshift-node-performance

@@ -59,8 +59,10 @@ kernel.hung_task_timeout_secs = 600
 kernel.nmi_watchdog = 0
 #> realtime
 kernel.sched_rt_runtime_us = -1
-#> cpu-partitioning (= 1) #realtime (= 0)
-kernel.timer_migration = 0
+# cpu-partitioning and realtime for RHEL disable it (= 0)
+# OCP is too dynamic when partitioning and needs to evacuate
+#> scheduled timers when starting a guaranteed workload (= 1)
+kernel.timer_migration = 1
 #> network-latency
 kernel.numa_balancing=0
 net.core.busy_read=50

functests/1_performance/performance.go

@@ -336,7 +336,7 @@ var _ = Describe("[rfe_id:27368][performance]", func() {
 				"kernel.nmi_watchdog":           "0",
 				"kernel.sched_rt_runtime_us":    "-1",
 				"vm.stat_interval":              "10",
-				"kernel.timer_migration":        "0",
+				"kernel.timer_migration":        "1",
 			}
 
 			key := types.NamespacedName{

testdata/render-expected-output/manual_tuned.yaml

@@ -26,7 +26,8 @@ spec:
       the value set by cpu-partitioning with an empty one\nbanned_cpus=\"\"\n\n\n[scheduler]\nruntime=0\ngroup.ksoftirqd=0:f:11:*:ksoftirqd.*\ngroup.rcuc=0:f:11:*:rcuc.*\nsched_rt_runtime_us=-1\nsched_min_granularity_ns=10000000\nsched_migration_cost_ns=5000000\nnuma_balancing=0\n\ndefault_irq_smp_affinity
       = ignore\n\n\n[sysctl]\n#> cpu-partitioning #realtime\nkernel.hung_task_timeout_secs
       = 600\n#> cpu-partitioning #realtime\nkernel.nmi_watchdog = 0\n#> realtime\nkernel.sched_rt_runtime_us
-      = -1\n#> cpu-partitioning (= 1) #realtime (= 0)\nkernel.timer_migration = 0\n#>
+      = -1\n# cpu-partitioning and realtime for RHEL disable it (= 0)\n# OCP is too dynamic when partitioning and needs to
+      evacuate\n#> scheduled timers when starting a guaranteed workload (= 1)\nkernel.timer_migration = 1\n#>
       network-latency\nkernel.numa_balancing=0\nnet.core.busy_read=50\nnet.core.busy_poll=50\nnet.ipv4.tcp_fastopen=3\n#>
       cpu-partitioning  #realtime\nvm.stat_interval = 10\n\n# ktune sysctl settings
       for rhel6 servers, maximizing i/o throughput\n#\n# Minimal preemption granularity