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diff --git a/fdio.infra.ansible/roles/performance_tuning/files/irqbalance b/fdio.infra.ansible/roles/performance_tuning/files/irqbalance
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+++ b/fdio.infra.ansible/roles/performance_tuning/files/irqbalance
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+# irqbalance is a daemon process that distributes interrupts across
+# CPUS on SMP systems.  The default is to rebalance once every 10
+# seconds.  This is the environment file that is specified to systemd via the
+# EnvironmentFile key in the service unit file (or via whatever method the init
+# system you're using has.
+#
+# ONESHOT=yes
+#    after starting, wait for a minute, then look at the interrupt
+#    load and balance it once; after balancing exit and do not change
+#    it again.
+#IRQBALANCE_ONESHOT=
+
+#
+# IRQBALANCE_BANNED_CPUS
+#    64 bit bitmask which allows you to indicate which cpu's should
+#    be skipped when reblancing irqs.  Cpu numbers which have their
+#    corresponding bits set to one in this mask will not have any
+#    irq's assigned to them on rebalance
+#
+IRQBALANCE_BANNED_CPUS="{{ ansible_processor_cores | irqbalance_banned_cpu_mask(ansible_processor_count, ansible_processor_threads_per_core) }}"
+#
+# IRQBALANCE_ARGS
+#    append any args here to the irqbalance daemon as documented in the man page
+#
+#IRQBALANCE_ARGS=