Messages in this thread | | | Date | Tue, 26 Feb 2008 22:21:31 -0800 | From | "Yinghai Lu" <> | Subject | Re: [discuss] Weird cpu mapping on 8-way dual-core machine |
| |
On Tue, Feb 26, 2008 at 9:48 PM, Yinghai Lu <yhlu.kernel@gmail.com> wrote: > On Tue, Feb 26, 2008 at 9:58 AM, Francisco Jesús Martínez Serrano > <franjesus@gmail.com> wrote: > > 2008/2/26, Andre Przywara: > > > > > So your BIOS option disables the shifting workaround and everything > > > works as intended by the specification, although I am not sure whether > > > you have any side effects (see above). > > > > Maybe I'm getting some side effects, but I'm not sure, when running an > > OpenMP code, I get a lot of numa_misses, at node1 and the same number > > of numa_foreign at node0. > > > > Out of pure ignorance, I was wondering if it could be related to the > > node0 getting 505896 pages (I believe that's 1976.2 MB) of > > ZONE_DMA32. I've seen options to disable DMA and DMA32. Is it safe? > > > can you try x86.git#testing ? > > http://people.redhat.com/mingo/x86.git/README > > and connect with serial console. > > command line: > apic=debug acpi.debug_level=0x0000000F debug console=uart8250,io,0x3f8,115200n8 > core fix is in x86.git#testing http://git.kernel.org/?p=linux/kernel/git/x86/linux-2.6-x86.git;a=commitdiff;h=ae2627a87c6f186ced0539d8e6f7a2c78dabc4c5
it will make sure that apicid to node mapping is right. esp don't have SRAT or wrong SRAT, and your system have apicid lifting
YH -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |