What is the APIX project? Any point for this? Wesley Shao: > 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 >> >> >> >> >> > >
-- Best Regards, Ming. ------------------------------------------ -Edward Shu -Solaris x86 Engineering, Sun Microsystems -tele: +86-10-62673100 __________________________________________
