Re: really slow problem with nvme

On Fri, Feb 23, 2024, 10:55 AM Warner Losh <imp@bsdimp.com> wrote:

>
>
> On Fri, Feb 23, 2024, 10:46 AM Bjoern A. Zeeb <
> bzeeb-lists@lists.zabbadoz.net> wrote:
>
>> Hi,
>>
>> this is a Samsung SSD 970 EVO Plus 1TB nvme and gpart and newfs
>> were already slow (it took like two hours for newfs).
>>
>> Here's another example now:
>>
>> # /usr/bin/time mkdir foo
>>          1.82 real         0.00 user         0.00 sys
>>
>> How does one debug this?
>>
>
> What filesystem? Sounds like UFS but just making sure. .
>
> So what's the link speed and number of lanes?  If it's bad i might reseat
> (though that might not help) that looks good...
>
> Though I'd bet money that this is an interrupt issue. I'd do a vmstat. -i
> to watch how quickly they accumulate...
>
> How old is the drive? Fresh install? Do other drives have this same issue
> in the same slot? Dies this drive have issues in other maxhines or slots?
>

Oh, and what's its temperature? Any message in dmesg?

Warner


> Warner
>
> --
>> Bjoern A. Zeeb                                                     r15:7
>>
>>