Charts and Downloads Are Not Accessible When IO Depth is Set Greater Than One

[larz99]

Running under Proxmox-ve: 8.2.0 (running kernel: 6.5.13-5-pve)
Fio 3.33
Cockpit 287.1-0+deb12u2
Cockpit-Benchmark 2.1.0-2focal
also running other Cockpit modules from 45Drives.

Benchmarks with IO Depth greater than 1 are run, but no data is plotted in the chart panel and no file is offered by the Download Report button.
I see the Fio process running and the "FIO-Benchmark.0.0" file created as expected. The file is cleaned up when the testing process in completed.
I can manually run Fio with IO Depth greater than one:

fio --name=read_iops --size=10G
--time_based --runtime=60s --ramp_time=2s --ioengine=libaio --direct=1
--verify=0 --bs=4K --iodepth=256 --rw=randread --group_reporting=1
--iodepth_batch_submit=256 --iodepth_batch_complete_max=256

All Benchmark Types, File Sizes, Run Times, function as expected when IO Depth is set to one:

When IO Depth is set to 2 or greater, the Chart Panel is empty and the Download Report button yields no file:

[TCS-UK]

I have the same problem.

[tekgeek1205]

Me 2
Ubuntu 24.04
Cockpit-Benchmark 2.1.1-1focal
Cockpit 316-1~bpo24.04.1_all.deb

[Desmo5574]

Me 3
Debian trixie/sid 6.9.5-x64v3-xanmod1
cockpit-benchmark_2.1.1-1focal
Cockpit 317-1

[sylwiuszp]

Same problem here, RockyLinux 9, kernel 5.14.0-503.15.1. cockpit 323.1, cockpit-benchmark 2.1.1.

[Desmo5574]

It's been gimped for quite awhile and it looks like it won't be fixed.
That's the way it goes...

[garg-art2002]

I was struggling with this too. Good thing, I came here to discover that this is faced by many. My install is Ubuntu 24.04.1.