I found this nice SSD benchmark tool: Solid State Drives (SSD) - Page #1 - pibenchmarks.com
Ran in on my MK2:
> Enter a description of your storage and setup (Example: Kingston A400 SSD on Pi 4 using StarTech SATA to USB adapter)
> Description: mycroft MK2 with 1TB USB-SSD CT1000MX
> (Optional) Enter alias to use on benchmark results. Leave blank for completely anonymous.
> Alias (leave blank for Anonymous):
> Category Test Result
> HDParm Disk Read 293.39 MB/s
> HDParm Cached Disk Read 303.63 MB/s
> DD Disk Write 175 MB/s
> FIO 4k random read 23432 IOPS (93729 KB/s)
> FIO 4k random write 8576 IOPS (34304 KB/s)
> IOZone 4k read 26039 KB/s
> IOZone 4k write 23425 KB/s
> IOZone 4k random read 18393 KB/s
> IOZone 4k random write 26958 KB/s
> Score: 7513
> Compare with previous benchmark results at: https://pibenchmarks.com/
After updating my wake-word “Hey, Mycroft” isn’t working at all any more. Pressing the button on my Mark II and asking a question also doesn’t work. I guess it can’t hear me.
A lot of MK2 owners experience that he RPI4 runs out of memory.
The kernel then kills a process and the chain of programs is broken to let neon function.
Only thing you can do is perform a restart or power cycle.
To check before you reboot if this is the case:
Login with ssh (ssh firstname.lastname@example.org) to your mk2 and issue this command:
sudo dmesg | grep -i oom
if nothing is returned and you see the “$” prompt directly , your mk2 did not run out of memory.
If you see any other kind of output, you probably did
Hmm, no I guess it’s not a memory issue because there is no output.
Glad you are certain the fact there is no output is not caused by a possible oom situation.
Well I’m not certain, but I agree that the lack of an out-of-memory message in the kernel message buffer suggests that’s not an issue. I’ve already rebooted a few times, so unless anyone has any other ideas I guess I’ll just reflash the drive.
I have another thread where I’m asking about the viability of using the Mark II for some low-resource server apps (syncthing and vdirsyncer, mainly), but if reflashing is the answer here then I’ll hold back because reinstalling things would be a pain.
The USB stick is really to slow to do almost anything.
Neon got so much more snappy when I moved to a USB-SSD.
I you could exchange the RPI4 -2GB for a 4 or even 8GB ram version, you probably could side load a lot more.
I just rebooted to new alpha so only 1 hr uptime:
Bootup: Thu Jun 15 08:55:44 2023 Load average: 2.22 2.96 4.27 13/624 2535
user : 01:22:33.27 30.7% page in : 1273947
nice : 00:00:00.00 0.0% page out: 243500
system: 00:15:24.82 5.7% page act: 186774
IOwait: 00:00:05.98 0.0% page dea: 204893
hw irq: 00:00:00.00 0.0% page flt: 1976045
sw irq: 00:00:18.73 0.1% swap in : 10059
idle : 02:50:22.00 63.4% swap out: 53832
uptime: 01:08:17.38 context : 48912996
CPU was 63% idle, but the load seems to always be around 2, so I assume there is an IO delay.
And it is already using swap memory in the standard 2GB RPI4:
$ free -h
total used free shared buff/cache available
Mem: 1.8Gi 1.6Gi 57Mi 103Mi 255Mi 174Mi
Swap: 2.0Gi 193Mi 1.8Gi