Raptor Computing Systems Hardware > Talos II

Unsatisfactory performance of SSD drives

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DKnoto:
Good news, Fedora 36 has experienced an amazing progression in this subject over the past month.

Kernel 6.0.9: ~30% increase in read performance over the 6.0.5 version.

Kernel 6.0.10: ~425% increase in read performance over the 6.0.9 version :)

DKnoto:
After two months of testing, I can present how the performance of my SSD changed
depending on the kernel version. I didn't expect there to be so much variability.
The results in the form of a graph in the attached image ;)

Woof:
Really useful graph, thanks for taking the time!

vikings.thum:
Disk I/O performance is affected by cache, so oflag should be used if you don't want that. That's --direct for hdparm and oflag=direct for dd.

DKnoto:
Today on Fedora 37, I upgraded the kernel to version 6.2.10-200. Not a recommendable experience.
This is the slowest kernel since I've been conducting systematic measurements :( . The results in
the linked graph:

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