On 06/06/12 02:44, Ole Tange wrote:
On Tue, Jun 5, 2012 at 1:29 PM, Igor M Podlesny<for.poige+lsr@xxxxxxxxx> wrote:
On 5 June 2012 15:47, Ole Tange<ole@xxxxxxxx> wrote:
On Tue, Jun 5, 2012 at 5:39 AM, Igor M Podlesny<for.poige+lsr@xxxxxxxxx> wrote:
On 5 June 2012 07:14, Ole Tange<ole@xxxxxxxx> wrote:
[…]
I tested this by creating 24 devices in RAM, used different chunk
sizes, and then copied the linux kernel source. Test script can be
found on http://oletange.blogspot.dk/2012/05/software-raid-performance-on-24-disks.html
:
Wanna try CONFIG_MULTICORE_RAID456? :-)
If the kernel can checksum 6196 MB/s why would I need
CONFIG_MULTICORE_RAID456? Please elaborate on why you think that is
needed.
I'd have thought there was a significant difference between the test
generating that figure (being a large, single block being checksummed)
and shunting around blocks from 20 odd block devices, arranging them and
checksumming them.
I'm not debating the validity of your tests at all, however I do
question your assertion than a single raid6 thread should even get close
to that theoretical figure when actually doing real work.
Why not do as the man suggested and enable CONFIG_MULTICORE_RAID456 and
see what happens?
Regards,
Brad
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