根据我的南桥 (ICH9M) 的文档，它有 4 个 HPET。我应该如何找到系统时钟（又称内核时钟、软件时钟）所源自的中断线？
看起来是 LOC，但是哪个进程处理它？
root@debian:/home/dzmitry# cat /proc/interrupts
CPU0 CPU1
0: 58199 56542 IO-APIC-edge timer
1: 217 211 IO-APIC-edge i8042
8: 0 1 IO-APIC-edge rtc0
9: 3776 3843 IO-APIC-fasteoi acpi
12: 22136 21159 IO-APIC-edge i8042
16: 420 432 IO-APIC-fasteoi uhci_hcd:usb1, snd_hda_intel
18: 28371 27353 IO-APIC-fasteoi uhci_hcd:usb8, b43
19: 0 0 IO-APIC-fasteoi uhci_hcd:usb7
20: 1 1 IO-APIC-fasteoi ehci_hcd:usb3, uhci_hcd:usb5
21: 0 0 IO-APIC-fasteoi uhci_hcd:usb2
23: 29676 29608 IO-APIC-fasteoi ehci_hcd:usb4, uhci_hcd:usb6
46: 20440 5269 PCI-MSI-edge ahci
47: 93 66 PCI-MSI-edge snd_hda_intel
48: 2 2 PCI-MSI-edge eth0
49: 538 11493 PCI-MSI-edge nvidia
NMI: 81 80 Non-maskable interrupts
LOC: 147328 140053 Local timer interrupts
SPU: 0 0 Spurious interrupts
PMI: 81 80 Performance monitoring interrupts
IWI: 4 6 IRQ work interrupts
RTR: 0 0 APIC ICR read retries
RES: 32270 32387 Rescheduling interrupts
CAL: 936 914 Function call interrupts
TLB: 6434 7000 TLB shootdowns
TRM: 0 0 Thermal event interrupts
THR: 0 0 Threshold APIC interrupts
MCE: 0 0 Machine check exceptions
MCP: 2 2 Machine check polls
HYP: 0 0 Hypervisor callback interrupts
ERR: 0
MIS: 0
以下是 rt 内核上的 irq 进程：
98 FF 95 135 - [irq/23-ehci_hcd]
96 FF 85 125 - [irq/16-uhci_hcd]
94 FF 85 125 - [irq/20-ehci_hcd]
56 FF 99 139 - [irq/8-rtc0]
55 FF 80 120 - [irq/1-i8042]
54 FF 79 119 - [irq/12-i8042]
3 TS - 19 0 [ksoftirqd/0]
36 FF 50 90 - [irq/9-acpi]
361 TS - 39 -20 [kvm-irqfd-clean]
340 FF 50 90 - [irq/19-i801_smb]
2317 FF 50 90 - [irq/32-eth0]
2264 FF 50 90 - [irq/16-snd_hda_]
2263 FF 50 90 - [irq/31-snd_hda_]
21 TS - 19 0 [ksoftirqd/1]
1501 FF 50 90 - [irq/33-nvidia]
120 FF 84 124 - [irq/18-uhci_hcd]
118 FF 83 123 - [irq/19-uhci_hcd]
115 FF 80 120 - [irq/23-uhci_hcd]
11569 TS - 19 0 grep irq
113 FF 82 122 - [irq/20-uhci_hcd]
11364 FF 49 89 - [irq/18-s-b43]
11363 FF 50 90 - [irq/18-b43]
1039 TS - 19 0 /usr/sbin/irqbalance --pid=/var/run/irqbalance.pid
101 FF 50 90 - [irq/30-0000:00:]
100 FF 81 121 - [irq/21-uhci_hcd]
答案1
我假设你的意思是内核滴答（单位为吉菲斯)。这些的来源通常是 LAPIC，即使有 HPET 可用。如果我理解正确的话，每个 CPU 都有自己的计时器。查看输出以cat /proc/timer_list查看系统上的配置（Tick Device在最后）。
/dev/hpet如果需要，您可以通过用户空间访问 HPET 。
我真的很好奇您打算用特定计时器使用的中断线信息做什么。