Edward Shu wrote: > See comments below. > 4. Technical Description >> 4.1. Introduction >> >> Pcitool is a low-level tool which provides a facility for getting and >> setting interrupt routing information. It is first introduced by >> PSARC/2005/232 and then made public by PSARC/2009/215. Currently on >> x86 it refers to an interrupt by using the interrupt vector, which >> isn't unique on a multi-CPU x86 system. >> >> On x86 platforms, the interrupt vectors are associated with the local >> APIC (Advanced Programmable Interrupt Controller) which is a component >> of CPU. So the number of total interrupt vectors in the system scales >> with the number of CPUs present in the system. And an interrupt vector >> number is only unique on the CPU which owns the vector, it isn't global >> unique in a system which has multiple CPUs. >> >> To uniquely identify an interrupt on x86, both interrupt vector number >> and the CPU which owns this vector are needed. This project will define >> the necessary changes to pcitool to uniquely identify an interrupt on >> x86, and also it will propose some output changes to be more user >> friendly. >> > When I type "'::interrupts" command in mdb, the output give me a list of > activating > interrupts. It seems that the interrupt vector is uniquely identified.
They won't be after the APIX project, hence the proposal. Wes > Why can't > we use the same vectors instead of adding owning CPU? Here is an output > example > from a X86 system. > > IRQ Vect IPL Bus Trg Type CPU Share APIC/INT# Driver Name(s) > 4 0xb0 12 ISA Edg Fixed 3 1 0x0/0x4 asy#0 > 9 0x81 9 PCI Lvl Fixed 1 1 0x0/0x9 acpi_wrapper_isr > 14 0x41 5 ISA Edg Fixed 2 1 0x0/0xe ata#0 > 20 0x82 9 PCI Lvl Fixed 3 1 0x0/0x14 ehci#0 > 21 0x83 9 PCI Lvl Fixed 0 1 0x0/0x15 ohci#0 > 22 0x60 6 PCI Lvl Fixed 1 1 0x0/0x16 nge#0 > 44 0x61 6 PCI Lvl Fixed 1 1 0x3/0x14 nge#1 > 56 0x62 6 PCI Lvl Fixed 2 1 0x2/0x0 e1000g#0 > 57 0x63 6 PCI Lvl Fixed 3 1 0x2/0x1 e1000g#1 > 58 0x40 5 PCI Lvl Fixed 2 1 0x2/0x2 mpt#0 > 160 0xa0 0 Edg IPI all 0 - poke_cpu > 208 0xd0 14 Edg IPI all 1 - kcpc_hw_overflow_intr > 209 0xd1 14 Edg IPI all 1 - cbe_fire > 210 0xd3 14 Edg IPI all 1 - cbe_fire > 240 0xe0 15 Edg IPI all 1 - xc_serv > 241 0xe1 15 Edg IPI all 1 - apic_error_intr > > > >
