nohz=on nohz_full=6-8 rcu_nocbs=6-8 进入adaptive-ticks模式后,如果CPU Core上的running task只有一个时,系统向其发送的LOC频率会显著降低,但LOC不能被完全屏蔽,系统内核的一些操作比如计算CPU负载等仍然需要周期性的LOC。 更多 中断和smp_affinity: 中断和smp_affinity · Cloud Atlashuataihuang.gitbooks...
CONFIG_RCU_NOCB_CPU 如果你想帮助调试内核可以开启,否则请关闭. Build-forced no-CBs CPUs 在开启CONFIG_RCU_NOCB_CPU选项的情况下,指定哪些CPU是No-CB CPU,相当于预先设置"rcu_nocbs="内核引导参数. Kernel .config supportCONFIG_IKCONFIG 把内核的配置信息编译进内核中,以后可以通过scripts/extract-ikconfig...
3 rcu_nocbs=2,3 irqaffinity=0,1 acpi_irq_nobalance noirqbalance i915.enable_rc6=0 i915.enable_dc=0 i915.disable_power_well=0 i915.enable_execlists=0 nmi_watchdog=0 nosoftlockup processor.max_cstate=0 intel.max_cstate=0 processor_idle.max_cstate=0 intel_idle.max_cstate=0 clock...
115200 console=ttyS1,115200 intel_iommu=on pci=realloc default_hugepagesz=1G hugepagesz=1G hugepages=16 hugepagesz=2M hugepages=1375 isolcpus=1,3,5,7,9,11,13,17 nohz_full=1,3,5,7,9,11,13,17 rcu_nocbs=1,3,5,7,9,11,13,17 $tuned_params"root="/dev/mapper/...
rcu_nocbs 当cpu有RCU callbacks pending的时候,nohz_full设置可能不会生效,使用rcu_nocbs来指定cpu进行卸载RCU callback processing mce=off 彻底禁用MCE(Machine Check Exception)。MCE是用来报告主机硬件相关问题的一种日志机制. 强制cpu进入高性能状态 idle=poll 从根本上禁用休眠功能(也就是禁止进入C-states状态)...
CONFIG_RCU_NOCB_CPU 如果你想帮助调试内核可以开启,否则请关闭. Build-forced no-CBs CPUs 在开启CONFIG_RCU_NOCB_CPU选项的情况下,指定哪些CPU是No-CB CPU,相当于预先设置"rcu_nocbs="内核引导参数. Kernel .config supportCONFIG_IKCONFIG 把内核的配置信息编译进内核中,以后可以通过scripts/extract-ikconfig...
CONFIG_RCU_NOCB_CPU_ALL=y 1. 2. 3. 4. 然后我重新启动计算机,以使用以下选项在此实时内核上启动: nmi_watchdog=0 rcu_nocbs=1 nohz_full=1 isolcpus=1 1. 2. 3. 4. 我还禁用了BIOS中的以下选项: C state intel speed step turbo mode ...
17 rcu_nocbs=1,3,5,7,9,11,13,17 $tuned_params"root="/dev/mapper/bel-root"initrd="/boot/initramfs-6.3.0_20230506.img $tuned_initrd"title="BigCloud Enterprise Linux (6.3.0_20230506) 8.2 (Core)"id="613790481f5a48e0b1608a83a3c399f7-6.3.0_20230506"index=1kernel="/boot/vmlinuz-6.3....
本例中需要在系统启动选项加入isolcpus=4,5,6,7 nohz_full=4,5,6,7 rcu_nocbs=4,5,6,7来使得4~7核变成adaptive-ticks。adaptive-ticks的效果是:如果core上的running task只有一个时,系统向其发送LOC的频率会降低成每秒一次,内核文档解释了不能完全屏蔽LOC的原因:"Some process-handling operations still ...
rcu_nocbs=1,4-6 Copy or rcu_nocbs=3 Copy The second example instructs the kernel that CPU 3 is a no-callback CPU. This means that RCU callbacks will not be done in thercuc/$CPUthread pinned to CPU 3, but in thercuo/$CPUthread, which can be moved to a hou...