Using RCU’s CPU Stall Detector — The Linux Kernel documentation https://www.kernel.org/doc/html/latest/RCU/stallwarn.html CPU性能中-stall cycle - 简书 https://www.jianshu.com/p/cb37298aa2e8 如果IPC > 1.0, 很可能是计算密集型的程序。可以试图减少执行指令的数量:消除不必要的工作。火焰图CP...
And as an additional note, I can reproduce the rcu stall more consistently when disabling cpuidle state1 on all cores (eliminating timer IPI's). This results in a somewhat consistent rcu stall, which seems to be reported elsewhere. 0x8010bd48 (+0x18) show_stack0x80149f3c (+0xb8)...
And as an additional note, I can reproduce the rcu stall more consistently when disabling cpuidle state1 on all cores (eliminating timer IPI's). This results in a somewhat consistent rcu stall, which seems to be reported elsewhere. 0x8010bd48 (+0x18) show_stack0x80149f3c (+0x...