Tim Chen <tim.c.chen@linux.intel.com> writes:
> On Fri, 2006-11-03 at 03:11 +0100, Adrian Bunk wrote:
>
>>
>> What's your CONFIG_NR_CPUS setting that you are seeing such a big
>> regression?
>>
>
> CONFIG_NR_CPUS is set to 8.
Ugh. This simply changes NR_IRQS from 256 to 512. Changing
the size of data from 1K to 2K.
So unless there is some other array that is sized by NR_IRQs
in the context switch path which could account for this in
other ways. It looks like you just got unlucky.
The only hypothesis that I can seem to come up with is that maybe
you are getting an extra tlb now that you didn't use to.
I think the per cpu area is covered by huge pages but maybe not.
Eric
-
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/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]