Comment 4 for bug 602336

You can do some performance optimization , such as isolating cpus, closing selinux, closing nmi_watchdog, disable intel_pstate and so on. You can try such grub cmdline:
nmi_watchdog=0 selinux=0 intel_pstate=disable nosoftlockup isolcpus=4,5,6,7 nohz_full=4,5,6,7