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Date: Fri, 16 Jan 2015 10:19:40 -0800
Message-ID: <CAKAYmM+EpvOYfFnF1i02aoTC2vfVT+q=6XvCPBnYg-mRQAVD1A@mail.gmail.com>
Subject: Re: Poor performance on Intel P3600 NVME driver
From: Chuck Tuffli <ctuffli@gmail.com>
To: Mihai Vintila <unixro@gmail.com>
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On Fri, Jan 16, 2015 at 12:12 AM, Mihai Vintila <unixro@gmail.com> wrote:
> I've tried to increase it and obtained around 90k iops for write, but now i
> only get :
>
> nvme0: WRITE sqid:6 cid:125 nsid:1 lba:3907028496 len:16
> nvme0: WRITE FAULTS (02/80) sqid:6 cid:125 cdw0:0
> nvme0: async event occurred (log page id=0x1)
> nvme0: WRITE sqid:6 cid:126 nsid:1 lba:528 len:16
> nvme0: WRITE FAULTS (02/80) sqid:6 cid:126 cdw0:0
> nvme0: async event occurred (log page id=0x1)
> nvme0: WRITE sqid:6 cid:127 nsid:1 lba:3907027984 len:16
> nvme0: WRITE FAULTS (02/80) sqid:6 cid:127 cdw0:0
> nvme0: async event occurred (log page id=0x1)

If it helps, 02/80 means media error / LBA out of range, and log page
0x1 contains command error information which will probably show that
the starting LBA field for the write command was the issue.

--chuck