Interrupts

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wikipedia:Interrupts

• sar -I ALL (not activated by default, see /etc/sysstat/sysstat)
• vmstat -s
• irqstat

watch cat /proc/interrupts

           CPU0       CPU1       CPU2       CPU3
  1:          0          0          9          0   IO-APIC   1-edge      i8042
  6:          3          0          0          0   IO-APIC   6-edge      floppy
  8:          0          0          0          0   IO-APIC   8-edge      rtc0
  9:          0          0          0          0   IO-APIC   9-fasteoi   acpi
 10:          0          0          0          0   IO-APIC  10-fasteoi   ehci_hcd:usb1, uhci_hcd:usb2
 11:          0      22125          0          0   IO-APIC  11-fasteoi   virtio1, uhci_hcd:usb3, uhci_hcd:usb4, qxl
 12:          0        144          0          0   IO-APIC  12-edge      i8042
 14:    6657156          0       7289          0   IO-APIC  14-edge      ata_piix
 15:          0   10221279    6694177       4977   IO-APIC  15-edge      ata_piix
 24:          0          0          0          0   PCI-MSI 49152-edge      virtio0-config
 25:          0          0     485005          0   PCI-MSI 49153-edge      virtio0-input.0
 26:          0          7          0          2   PCI-MSI 49154-edge      virtio0-output.0
 27:         91          0          0          0   PCI-MSI 65536-edge      snd_hda_intel:card0
NMI:          0          0          0          0   Non-maskable interrupts
LOC:  104440170  104248245  104039837  105393358   Local timer interrupts
SPU:          0          0          0          0   Spurious interrupts
PMI:          0          0          0          0   Performance monitoring interrupts
IWI:          0          0          0          0   IRQ work interrupts
RTR:          0          0          0          0   APIC ICR read retries
RES:   52557650   51011995   50957024   52508445   Rescheduling interrupts
CAL:    5609651    5124830    6201466    7524164   Function call interrupts
TLB:    2115360    1905026    1871874    2112061   TLB shootdowns
TRM:          0          0          0          0   Thermal event interrupts
THR:          0          0          0          0   Threshold APIC interrupts
DFR:          0          0          0          0   Deferred Error APIC interrupts
MCE:          0          0          0          0   Machine check exceptions
MCP:        226        226        226        226   Machine check polls
HYP:          0          0          0          0   Hypervisor callback interrupts
ERR:          0
MIS:          0
PIN:          0          0          0          0   Posted-interrupt notification event
NPI:          0          0          0          0   Nested posted-interrupt event
PIW:          0          0          0          0   Posted-interrupt wakeup event

May 19 16:30:24 SERVER kernel: perf: interrupt took too long (4082 > 4051), lowering kernel.perf_event_max_sample_rate to 49000

Sep 29 15:50:02 SERVER kernel: ata1: lost interrupt (Status 0x58)

Related

• irqstat

See also

• sar, installation, sar -A, sar -F, sar -d, sar -I ALL, sar -n NFS, sar -r, sar -S, sar -W, sar -n ALL, Installing sysstat using Ansible, /etc/sysstat/sysstat, /etc/cron.d/sysstat, sar --help, Sysstat changelog, /var/log/sysstat/, cpu time steal, sargraph, isag, Telegraf
• Process, zombie process, fork, thread: ps, tree, pstree, ps axf, proc, pwdx, which, watch, sar -q, tload, uptime, Interrupts, pgrep, tasklist (Windows), Zombie process, pstack, docker ps, docker-compose ps, jobs, acct, process mrelease, pidstat, IPC, pidof
• ksoftirqd
• interrupts, /proc/interrupts, %system, Message-Signaled Interrupt (MSI)
• FHS, /proc/, /proc/net/, /boot/, /run/, /dev/, /usr/, /var/run/, /etc/, /var/, /var/lib/ /var/log/, /var/www/, /opt/, /lib/, /sys/, /proc/kcore, /proc/sys/, /proc/sys/vm/, /snap/, /mnt/, /mnt/data, /var/opt/, /usr/bin/, /lib/, /proc/$PID/, /proc/self/
• CPU, GPU, NPU, TPU, DPU, Groq, Proliant, thread (Pthreads), processor, CPU socket, core, ARM , CPU Virtualization, Intel, AMD, nm, lscpu, AVX-512, Passthrough, CPU intensive, Graviton processor, Branch predictor, vCPU, SSE, Power, CPU cache