Salvador Liébana Posted March 25, 2021 Share Posted March 25, 2021 HI guys, one guy at my server realized some nvme testing and the write speed results are far below compared to radxa official benchmark that's probably based on legacy kernel. anyone had better benchmarks on write speeds without legacy kernel (so, mainline) 0 Quote Link to comment Share on other sites More sharing options...
piter75 Posted March 25, 2021 Share Posted March 25, 2021 @Salvador Liébana I would be very cautious about comparing with results that I don't know how they were obtained. In fact I would avoid it ;-) We cannot say much about Radxa's benchmarking looking at the presented graph. Nonetheless below you will find the iozone run I performed with LK 5.10.20: piter@rockpi-4c:~$ uname -a Linux rockpi-4c 5.10.20-rockchip64 #1 SMP PREEMPT Fri Mar 5 10:47:39 CET 2021 aarch64 GNU/Linux It was performed using iozone (429) on EXT4 with ROCK Pi 4C and Corsair Force MP510B 480GB (yes, the model with degraded flash chips): Spoiler piter@rockpi-4c:~$ iozone -e -I -a -s 1G -r 4k -r 512k -r 16M -i 0 -i 1 -i 2 Iozone: Performance Test of File I/O Version $Revision: 3.429 $ Compiled for 64 bit mode. Build: linux Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa. Run began: Thu Mar 25 19:37:30 2021 Include fsync in write timing O_DIRECT feature enabled Auto Mode File size set to 1048576 kB Record Size 4 kB Record Size 512 kB Record Size 16384 kB Command line used: iozone -e -I -a -s 1G -r 4k -r 512k -r 16M -i 0 -i 1 -i 2 Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 1048576 4 100179 166395 178300 179572 52739 110763 1048576 512 1079229 1073992 903277 903298 902415 1119885 1048576 16384 1493074 1482710 1572587 1577645 1577413 1482543 iozone test complete. As you can see it reaches 1GB+/s speeds both writing and reading with large enough block size, hovers around 1GB/s with medium block size and dives to 50-200MB/s with small blocks. pcie-gen2 overlay is not needed with ROCK Pi 4C as unsupported gen2 link speed was mainlined for all ROCK Pi 4 boards. BTW. Is the guy Jeff Geerling (https://github.com/geerlingguy)? If so then I am actually using the way he was using to compare different SD cards' performance with Raspberry Pi ;-) https://github.com/geerlingguy/raspberry-pi-dramble/issues/7 0 Quote Link to comment Share on other sites More sharing options...
Salvador Liébana Posted March 25, 2021 Author Share Posted March 25, 2021 obviously not, he is not a moron rpi fan boy. he use real hw, rk3399. the performance dramatically changed with the overlay.. so yes, its needed somehow, thanks for the answer @piter75 I will give you proper feedback soon. 0 Quote Link to comment Share on other sites More sharing options...
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