Messages in this thread | | | From | "H. Peter Anvin" <> | Subject | Re: 2.2.15 driver OK on UP - no ints on SMP (SOLVED) | Date | 7 Jul 2000 13:11:19 -0700 |
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Followup to: <3964E2EB.C338FAB@timpanogas.com> By author: "Jeff V. Merkey" <jmerkey@timpanogas.com> In newsgroup: linux.dev.kernel > > Linus, > > When we were putting SMP on NetWare, we discovered that using the IOAPIC > hardware for UP systems was almost 4% faster than the 8259-PIC for LAN > drivers (since it has a dedicated ICC bus to pass interrupt messages to > a local APIC). Something to consider.... >
The problem is that most UP mobos don't *have* IOAPIC's... Linux will use them if they're there (most commonly on SMP mobos with only one slot populated, or on mobos which have UP and SMP versions.)
-hpa -- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt
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