From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Vladimir G. Ivanovic" Subject: Re: Dual Processor Date: Tue, 14 May 2002 17:41:15 -0700 Sender: linux-smp-owner@vger.kernel.org Message-ID: <200205150041.g4F0fFu04818@bach.leonora.org> References: <200205141338.g4EDcvv27086@dpimail.net> Mime-Version: 1.0 (generated by tm-edit 1.8) Return-path: In-Reply-To: Your message of "Tue, 14 May 2002 18:16:23 +0430." <200205141338.g4EDcvv27086@dpimail.net> List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: hamhey Cc: linux-smp@vger.kernel.org I recommend that you search the linux-smp archives or use a search engine to look on the WWW for the answer to your questions *before* asking a mailing list. That way people don't have to answer the same question again and again. If you had done so, you would have discovered that you should set you MPS setting in the BIOS to 1.1 and reboot. If you are still having problems, make sure you have the lastest BIOS (rev 1014?) and/or use the "noapic" option on the boot command line. IO-APIC allows both processors to field interrupts. Without IO-APIC, only one processor does. Usually, for a desktop machine, this is not a calamity. For a web server, it's more of an issue. If everything is working, your /proc/interrupts should look something like: CPU0 CPU1 0: 1255948 1257289 IO-APIC-edge timer 1: 15469 15349 IO-APIC-edge keyboard 2: 0 0 XT-PIC cascade 4: 11163 10377 IO-APIC-edge serial 5: 79559 79534 IO-APIC-level es1371, usb-uhci, usb-uhci 8: 9869264 9862018 IO-APIC-edge rtc 9: 17601 17613 IO-APIC-level sym53c8xx 10: 109682 109643 IO-APIC-level eth0 11: 47 50 IO-APIC-level sym53c8xx 12: 136004 138160 IO-APIC-edge PS/2 Mouse 14: 224 134 IO-APIC-edge ide0 15: 29773 28616 IO-APIC-edge ide1 NMI: 0 0 LOC: 2513322 2513376 ERR: 0 MIS: 0 --- Vladimir -------- Vladimir G. Ivanovic http://leonora.org/~vladimir 2770 Cowper St. vladimir@acm.org Palo Alto, CA 94306-2447 +1 650 678 8014 "hm" == hamhey m writes: hm> Dear sir/madam hm> I installed Linux redhat 7.1 on Intel platform running 2x Intel-800 Mhz hm> processor on ASUS CUV4x-D mother board. hm> One of the CPUs is not cooming up due to the following error message at boot: hm> -------------------------------------------------------------------- hm> Total of 2 processors activated (3207.98 Bogo MIPS). Before bogomips. hm> Boot done. hm> ENABLING IO-APIC IRQs hm> ... changing IO_APIC physical APIC ID to 2 .. ok. hm> Syc=nchronizing Arb IDs hm> TIMER: vector=49 Pin1=2 testing the IO APIC pin2=0 hm> WARNING: Unexpected IO-APIC IRQs hm> -------------------------------------------------------------------- hm> Would you mind giving me the reason of getting the reason of the error message hm> at boot time and the system is comming with just on CPU without any problem hm> choosing Linux-Up option for booting. hm> Thanks hm> Hamdi hm> - hm> To unsubscribe from this list: send the line "unsubscribe linux-smp" in hm> the body of a message to majordomo@vger.kernel.org hm> More majordomo info at http://vger.kernel.org/majordomo-info.html