On posix_net_conf.sh's single queue NIC mode (which means RPS enabled mode), we are excluded cpu0 and it's sibling from network stack processing cpus, and assigned NIC IRQ to cpu0.
So always network stack is not working on cpu0 and it's sibling, to get better performance we need to exclude these cpus from scylla too.
To do this, we need to get RPS cpu mask from posix_net_conf.sh, pass it to scylla_cpuset_setup to construct /etc/scylla.d/cpuset.conf when scylla_setup executed.
Signed-off-by: Takuya ASADA <syuu@scylladb.com>
Message-Id: <1472544875-2033-2-git-send-email-syuu@scylladb.com>
533dc0485d