NVMe sluggish

[Linux User]

Any inputs ?

On Wed, May 17, 2017 at 3:34 PM, Linux User <newhorizons009 at gmail.com> wrote:
> Hello All,
>
>
> I switched my ssd from M.2 based ahci protocol to nvme protocol, with
> that, when i do chmod 777 -R /mnt/ssd it takes forever, however same
> step on the ahci based ssd takes a blink of an eye.
>
> Even doing ls at /mnt/ssd takes a long time.
>
>
> I am running 3.10-ltsi. Below are my fs creation params.
>
> mke2fs -F -t ext4 /dev/nvme0n1p1
>   tune2fs -o journal_data_writeback /dev/nvme0n1p1
>   tune2fs -O ^has_journal /dev/nvme0n1p1
>
>
> Below are my mounting options,
>
> mount -t ext4 -o data=ordered,noatime,nodiratime,norelatime /dev/nvme0n1p1
>
>
> Any clues ?
>
>
> Having said above, I did a fio random read test on both AHCI and NVMe,
> and that seems to have good results.
>
> Toshiba NVMe
>
> bw (KB  /s): min=14320, max=21496, per=100.00%, avg=19765.54, stdev=1813.54
>
>
>
> Samsung AHCI
>
> bw (KB  /s): min=15687, max=19720, per=99.52%, avg=17773.93, stdev=1236.09