On Tue, Oct 14, 2008 at 10:19 AM, Tejun Heo <tj@xxxxxxxxxx> wrote:
> Grant Grundler wrote:
>> On Mon, Oct 13, 2008 at 4:25 PM, Tejun Heo <tj@xxxxxxxxxx> wrote:
>> ...
>>>> Tejun, what kind of throughput have you seen when you have been testing
>>>> the sil3132 and multipliers?
>>> That's the limit of sil3124/3132. Dunno why but you can't go over that.
>>
>> To be clear, I understood "that" == ~100 MB/s
>
> It's somewhere around that. I don't remember the exact number at the
> moment.
I know a number but I'm also burdened with an NDA.
If someone could post the output of this command:
fio-1.21 --runtime=60 --time_based --bwavgtime=5000 \
--thread --numjobs=4 \
-rw=read --direct=1 --iodepth=8 --ioengine=sync \
--ioscheduler=noop \
--bs=256k --size=256k \
--name=port1 --filename=/dev/sdb \
--name=port2 --filename=/dev/sdc
Fix up the --filename to be the correct /dev names.
Re-run the above with "--rw=write" and make sure the disks can be clobbered!
This will "exercise" the disk controller cache so it doesn't matter
which disk is connected.
For fun, use 4k instead of 256k to measure CPU utilization and
transaction rates.
In this case, the disk models vary alot.
...
> I asked SIMG about the issue and whether they have newer revisions which
> solve the issue. When I know more, I'll post it on the ata wiki page.
thanks!
grant
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