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Preji pekny den, mam problem se zatezovanim CPU procesem ksoftirqd. Ten je schpny "sezrat" i 50% CPU. Tim se stava PC strasne pomale. Ve vypisu preruseni sem zjistil, ze sitovka Realtek RTL8111/8168B vyuziva jen jedno jadro - drivery mam od realteku 8.029.00-NAPI prelozene ze zdrojaku jelikoz s puvodnim z CentOSu sitovka obcas nenajela.

vypis lspci -v:

04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)
	Subsystem: ASUSTeK Computer Inc. M4A785TD Motherboard
	Physical Slot: 33
	Flags: bus master, fast devsel, latency 0, IRQ 36
	I/O ports at d800 [size=256]
	Memory at f8fff000 (64-bit, prefetchable) [size=4K]
	Memory at f8ff8000 (64-bit, prefetchable) [size=16K]
	Expansion ROM at fbdf0000 [disabled] [size=64K]
	Capabilities: [40] Power Management version 3
	Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [70] Express Endpoint, MSI 01
	Capabilities: [ac] MSI-X: Enable- Count=4 Masked-
	Capabilities: [cc] Vital Product Data
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Virtual Channel 
	Capabilities: [160] Device Serial Number 00-00-00-00-00-00-00-00
	Kernel driver in use: r8168
	Kernel modules: r8168, r8169

vypis preruseni cat /proc/interupts

           CPU0       CPU1       CPU2       CPU3       
  0:        144          9          2          1   IO-APIC-edge      timer
  1:          0          1          1          0   IO-APIC-edge      i8042
  8:          1          0          0          0   IO-APIC-edge      rtc0
  9:          0          0          0          0   IO-APIC-fasteoi   acpi
 12:          1          0          1          2   IO-APIC-edge      i8042
 14:       2342       2661       2500       2455   IO-APIC-edge      ata_piix
 15:          0          0          0          0   IO-APIC-edge      ata_piix
 16:        232         77        220         77   IO-APIC-fasteoi   uhci_hcd:usb5
 18:      25566          7      23446          3   IO-APIC-fasteoi   uhci_hcd:usb4, pata_jmicron
 19:         46       1192         42        354   IO-APIC-fasteoi   uhci_hcd:usb3
 23:         55      64149         53      63777   IO-APIC-fasteoi   ehci_hcd:usb1, uhci_hcd:usb2
 24:          0          0          0          0   PCI-MSI-edge      pciehp
 25:          0          0          0          0   PCI-MSI-edge      pciehp
 26:          0          0          0          0   PCI-MSI-edge      pciehp
 27:          0          0          0          0   PCI-MSI-edge      pciehp
 36:          7        654      13788       2417   PCI-MSI-edge      eth0        ---- cita vzdy jen jeden counter
 37:          1          0          0          0   PCI-MSI-edge      xhci_hcd
 38:          0          0          0          0   PCI-MSI-edge      xhci_hcd
 39:          0          0          0          0   PCI-MSI-edge      xhci_hcd
 40:          0          0          0          0   PCI-MSI-edge      xhci_hcd
 41:          0          0          0          0   PCI-MSI-edge      xhci_hcd
NMI:        210        128        210        128   Non-maskable interrupts
LOC:     214662     182634     196572     189583   Local timer interrupts
SPU:          0          0          0          0   Spurious interrupts
PMI:        210        128        210        128   Performance monitoring interrupts
PND:          0          0          0          0   Performance pending work
RES:       6568       6021       3042       7701   Rescheduling interrupts
CAL:      16557      18081      12972      15110   Function call interrupts
TLB:       3141       2486       6117       5248   TLB shootdowns
TRM:          0          0          0          0   Thermal event interrupts
THR:          0          0          0          0   Threshold APIC interrupts
MCE:          0          0          0          0   Machine check exceptions
MCP:         17         17         17         17   Machine check polls

dalsi zvlastni vec je, ze cita treba counter ctvrteho jadra, ale v /proc/irq/36/smp_affinity je cislo 8. A co jsem vygooglil melo by tam byt pocet jader. Kdyz sem tam vsak dal 4 tak se to chova stejne.