Hi,
Look at how slow the raid benchmarks are in dmesg with 8GB of memory!
[ 59.592560] raid6: using algorithm sse2x4 (476 MB/s)
[ 59.597558] raid5: using function: generic_sse (56.000 MB/sec)
Yikes!
With mem=4096M:
[ 60.336352] raid6: using algorithm sse2x4 (6804 MB/s)
[ 60.341345] raid5: using function: generic_sse (8552.000 MB/sec)
What is going on here?
Justin.
I saw a similar effect on a P5 board that could
only cache 64MB of memory a long time ago.
Putting more memory into it made the machine slower
and e.g. made the sym2 driver giving up at initialization.
Maybe it's a modern reincarnation of the problem?
Best regards,
Zoltán Böszörményi
-
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]
