Alan Cox wrote:
> Ar Gwe, 2006-06-30 am 18:13 +0200, ysgrifennodd Andreas Mohr:
> > Use an independently-formatted "unsigned int" for data instead of a
> > restrictive "u16" to avoid instruction fetch pipeline stalls
> > probably caused by the byte calculations later.
I'm hitting this all the time on 2.6 more so than on 2.4, especially for CPU
bound procs.
> 1. This is a gcc problem
Maybe, but on 2.6, echo 0 > /proc/sys/kernel/randomize_va_space seems to
improve the situation most of the time, although not always.
> 2. Not everyone is using an intel x86-32 box which has such problems
Specifically, 3/4/586 don't show this problem, whereas 686+ show the problem
to varying degrees with slowdown upto 333% on P4.
Can you confirm this?
Thanks!
--
Al
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
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]
