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Napisano: 11 Maj 2011 11:38
nešto sam gledao i kao da nije omogućen kod mene ?
(a na nekim distroima jeste bio)
da li treba da stavim pci=msi u grub i da rebutujem?
http://www.linuxquestions.org/questions/linux-soft.....ts-800087/
trenutno je mandriva 2009
on se pojavi ovde u prekidima
http://www.gentoo-wiki.info/Gigabyte_GA-G33M-S2H#Bus_Settings
Code: cat /proc/interrupts
CPU0 CPU1
0: 101 9 IO-APIC-edge timer
1: 8610 8640 IO-APIC-edge i8042
7: 0 0 IO-APIC-edge lpptest
8: 0 1 IO-APIC-edge rtc
317: 375 371 PCI-MSI-edge ahci
NMI: 0 0
LOC: 2023669 2499122
ERR: 0
kao "PCI-MSI-edge"
http://www.mjmwired.net/kernel/Documentation/PCI/MSI-HOWTO.txt
u dmesg dobijem
$ dmesg | grep -i msi
pcieport-driver 0000:00:1c.0: found MSI capability
pcieport-driver 0000:00:1c.1: found MSI capability
$ cat /proc/interrupts
CPU0 CPU1
0: 525 279 IO-APIC-edge timer
1: 115029 115450 IO-APIC-edge i8042
4: 445 449 IO-APIC-edge lirc_serial
7: 0 0 IO-APIC-edge parport0
8: 6 10 IO-APIC-edge rtc0
9: 0 0 IO-APIC-fasteoi acpi
12: 58 57 IO-APIC-edge i8042
14: 890054 890682 IO-APIC-edge ata_piix
15: 0 0 IO-APIC-edge ata_piix
16: 31126849 31122939 IO-APIC-fasteoi uhci_hcd:usb5, HDA Intel, i915@pci:0000:00:02.0
17: 8 12 IO-APIC-fasteoi
18: 29 32 IO-APIC-fasteoi uhci_hcd:usb4
19: 6985179 6988242 IO-APIC-fasteoi uhci_hcd:usb3, ata_piix, eth0
20: 891000 890792 IO-APIC-fasteoi sata_via
23: 1 2 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb2
NMI: 0 0 Non-maskable interrupts
LOC: 73897888 77777328 Local timer interrupts
RES: 4655781 4779176 Rescheduling interrupts
CAL: 131606 116897 function call interrupts
TLB: 793754 751227 TLB shootdowns
TRM: 0 0 Thermal event interrupts
SPU: 0 0 Spurious interrupts
ERR: 0
MIS: 0
nego sad je isključena mrežna 
$ls /sys/bus/pci/devices/*/msi_bus
/sys/bus/pci/devices/0000:00:00.0/msi_bus
/sys/bus/pci/devices/0000:00:02.0/msi_bus
/sys/bus/pci/devices/0000:00:1b.0/msi_bus
/sys/bus/pci/devices/0000:00:1c.0/msi_bus
/sys/bus/pci/devices/0000:00:1c.1/msi_bus
/sys/bus/pci/devices/0000:00:1d.0/msi_bus
/sys/bus/pci/devices/0000:00:1d.1/msi_bus
/sys/bus/pci/devices/0000:00:1d.2/msi_bus
/sys/bus/pci/devices/0000:00:1d.3/msi_bus
/sys/bus/pci/devices/0000:00:1d.7/msi_bus
/sys/bus/pci/devices/0000:00:1e.0/msi_bus
/sys/bus/pci/devices/0000:00:1f.0/msi_bus
/sys/bus/pci/devices/0000:00:1f.1/msi_bus
/sys/bus/pci/devices/0000:00:1f.2/msi_bus
/sys/bus/pci/devices/0000:00:1f.3/msi_bus
/sys/bus/pci/devices/0000:02:00.0/msi_bus
/sys/bus/pci/devices/0000:03:00.0/msi_bus
/sys/bus/pci/devices/0000:03:01.0/msi_bus
$ cat /sys/bus/pci/devices/*/msi_bus
1
1
1
Dopuna: 11 Maj 2011 11:43
ček ček , a on će to da uključi i za serial ata disk? ako se globalno omogući? - da li je to dobro
jer i sad ide skoro sve ok
ili u biosu sam nešto izmenio? (otkud znam da li sam čačnuo u neki prekid  )
da li mi to uopšte treba?
Dopuna: 11 Maj 2011 12:32
-----------------------
?U redu je. dodao sam u grub (ili lilo ili drugi bootloader)
pci=msi
i posle reboota se pojavile stavke , i nije se za sada ukočilo 
verovatno postoji dobar razlog zašto je po defaultu isključeno
jedino još treba za snd-hda-intel da se eksplicitno uključi u drajveru
a ova druga dva,mrežna i grafika ga automatski prepoznaju
za snd-hda-intel :
modprobe snd-hda-intel enable_msi=1 .....i drugi parametri
ili se stavi u modprobe skripte
$ cat /proc/interrupts
CPU0 CPU1
0: 238 1 IO-APIC-edge timer
1: 112 115 IO-APIC-edge i8042
4: 2 2 IO-APIC-edge lirc_serial
7: 0 0 IO-APIC-edge parport0
8: 30 26 IO-APIC-edge rtc0
9: 0 0 IO-APIC-fasteoi acpi
12: 58 57 IO-APIC-edge i8042
14: 528 512 IO-APIC-edge ata_piix
15: 0 0 IO-APIC-edge ata_piix
16: 0 0 IO-APIC-fasteoi uhci_hcd:usb5
18: 29 30 IO-APIC-fasteoi uhci_hcd:usb4
19: 6606 6623 IO-APIC-fasteoi uhci_hcd:usb3, ata_piix, eth0
20: 507 525 IO-APIC-fasteoi sata_via
23: 1 2 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb2
219: 0 0 PCI-MSI-edge i915@pci:0000:00:02.0
220: 1 0 PCI-MSI-edge eth1
221: 549 530 PCI-MSI-edge HDA Intel
NMI: 0 0 Non-maskable interrupts
LOC: 43056 43698 Local timer interrupts
RES: 2225 2284 Rescheduling interrupts
CAL: 13964 346 function call interrupts
TLB: 1037 1074 TLB shootdowns
TRM: 0 0 Thermal event interrupts
SPU: 0 0 Spurious interrupts
ERR: 0
MIS: 0
hmmm ali bi trebao i za libata da prepozna ili ne možda je drugi neki parametar 
primetićete da su sad bolje raspoređeniji prekidi i da je manje deljenih ili shared IRQ-linija
(gde je to na fizičkom nivou rešeno a ne preko acpi biosa pa da ih on multiplikuje)
Bitno je recimo za servere kada ima 10 i više diskova i onda se svakom
disku dodeli posebni MSI -irq i onda su happy
Ovaj prekid mislim da važi samo za PCI-Expres bus a ne za stariji pci
edit :
takođe se koristi u slučaju da je veći broj ethernet kartica
i može da se podešava cpu afinity tako da recimo neki quad-core bude ravnomerno
opterećen po jezgrima i ima jače izvršavanje i protok
(zar nije to automaski regulisano? )
https://www.centos.org/modules/newbb/viewtopic.php?topic_id=30824&forum=39
CPU0 CPU1 CPU15
0: 600299726 0 0 IO-APIC-edge timer
1: 3 0 0 IO-APIC-edge i8042
8: 1 0 0 IO-APIC-edge rtc
9: 0 0 0 IO-APIC-level acpi
12: 4 0 0 IO-APIC-edge i8042
50: 0 0 0 IO-APIC-level uhci_hcd:usb6, uhci_hcd:usb8
58: 6644 25103 0 IO-APIC-level ioc0
66: 0 0 0 IO-APIC-level ata_piix
74: 221 533830 0 IO-APIC-level ata_piix
98: 35 0 2902361 PCI-MSI-X eth1-0
106: 61 11 3841 PCI-MSI-X eth1-1
114: 28 0 61452 PCI-MSI-X eth1-2
122: 24 1586 22 PCI-MSI-X eth1-3
130: 2912 0 337 PCI-MSI-X eth1-4
138: 21 0 28 PCI-MSI-X eth1-5
146: 21 0 56 PCI-MSI-X eth1-6
154: 34 1 1 PCI-MSI-X eth1-7
209: 23 0 0 IO-APIC-level ehci_hcd:usb1
217: 0 0 0 IO-APIC-level ehci_hcd:usb2, uhci_hcd:usb5, uhci_hcd:usb7
225: 0 0 0 IO-APIC-level uhci_hcd:usb3
233: 0 0 0 IO-APIC-level uhci_hcd:usb4
NMI: 7615 2989 2931
LOC: 600328144 600328099 600327086
ERR: 0
MIS: 0
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