DragonFly-2.3.0.864.gc5b83 master sys/platform/pc32/apic mpapic.c sys/platform/pc32/isa clock.c sys/platform/pc64/isa clock.c sys/platform/vkernel/platform systimer.c sys/sys systimer.h

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Sepherosa Ziehau wrote:
> Could you give me the estimate about how long the C3 state will
> maintain, if lapic timer is not used?

Is this data helpful for you?

$ for i in `seq 1 20`; do sysctl -a | grep cx_usage; sleep 1; done
hw.cpu0.cx_usage: 0.00% 3.13% 96.86% last 98us
hw.cpu1.cx_usage: 0.00% 2.00% 97.99% last 165us
hw.cpu0.cx_usage: 0.00% 3.15% 96.84% last 30us
hw.cpu1.cx_usage: 0.00% 2.02% 97.97% last 94us
hw.cpu0.cx_usage: 0.00% 3.18% 96.81% last 35us
hw.cpu1.cx_usage: 0.00% 2.04% 97.95% last 112us
hw.cpu0.cx_usage: 0.00% 3.24% 96.75% last 22us
hw.cpu1.cx_usage: 0.00% 2.05% 97.94% last 25us
hw.cpu0.cx_usage: 0.00% 3.27% 96.72% last 99us
hw.cpu1.cx_usage: 0.00% 2.07% 97.92% last 96us
hw.cpu0.cx_usage: 0.00% 3.29% 96.70% last 1529us
hw.cpu1.cx_usage: 0.00% 2.09% 97.90% last 168us
hw.cpu0.cx_usage: 0.00% 3.36% 96.63% last 276us
hw.cpu1.cx_usage: 0.00% 2.09% 97.90% last 174us
hw.cpu0.cx_usage: 0.00% 3.36% 96.63% last 25us
hw.cpu1.cx_usage: 0.00% 2.13% 97.86% last 176us
hw.cpu0.cx_usage: 0.00% 3.38% 96.61% last 24us
hw.cpu1.cx_usage: 0.00% 2.16% 97.83% last 23us
hw.cpu0.cx_usage: 0.00% 3.41% 96.58% last 72us
hw.cpu1.cx_usage: 0.00% 2.18% 97.81% last 118us
hw.cpu0.cx_usage: 0.00% 3.46% 96.53% last 23us
hw.cpu1.cx_usage: 0.00% 2.19% 97.80% last 187us
hw.cpu0.cx_usage: 0.00% 3.51% 96.48% last 333us
hw.cpu1.cx_usage: 0.00% 2.20% 97.79% last 111us
hw.cpu0.cx_usage: 0.00% 3.57% 96.42% last 3040us
hw.cpu1.cx_usage: 0.00% 2.21% 97.78% last 181us
hw.cpu0.cx_usage: 0.00% 3.60% 96.39% last 28us
hw.cpu1.cx_usage: 0.00% 2.22% 97.77% last 103us
hw.cpu0.cx_usage: 0.00% 3.64% 96.35% last 24us
hw.cpu1.cx_usage: 0.00% 2.24% 97.75% last 597us
hw.cpu0.cx_usage: 0.00% 3.68% 96.31% last 44us
hw.cpu1.cx_usage: 0.00% 2.26% 97.73% last 59us
hw.cpu0.cx_usage: 0.00% 3.72% 96.27% last 883us
hw.cpu1.cx_usage: 0.00% 2.27% 97.72% last 77us
hw.cpu0.cx_usage: 0.00% 3.77% 96.22% last 29us
hw.cpu1.cx_usage: 0.00% 2.28% 97.71% last 111us
hw.cpu0.cx_usage: 0.00% 3.82% 96.17% last 19us
hw.cpu1.cx_usage: 0.00% 2.29% 97.70% last 227us
hw.cpu0.cx_usage: 0.00% 3.87% 96.12% last 23us
hw.cpu1.cx_usage: 0.00% 2.30% 97.69% last 138us
$


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