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inbox:benchmark.usb

USB Benchmarks

These benchmarks provide a rough estimate of how USB devices perform on various hardware and software configurations.

I see two possible bottlenecks when bechmarking read/write operations on a storage device: the CPU and the device itself.
* If you expected notable differences between the CPUs, you would conduct a series of benchmark with the same storage device but different CPUs. You would also make sure that the storage device used in this benchmark is NOT a bottle neck.
* If you expected notable differences between the storage devices, you would conduct a series of benchmarks with the same CPU, but different storage devices. Again, you would make sure, that the CPU is not the bottle neck!
* there is of course a third possible bottle neck: the USB controller (MAC+PHY) on the SoC and/or possibly the USB-to-SATA converter, in case you use a SATA hard disk. ;-)

I do not know, about notable differences in CPU, but there definitely are very slow flash storage devices purchasable out there with maximum read/write "speeds" of < 2MB/s and less!!!

Prerequisites

^ ^^^ ^^^ Timing (MB/s) ^^ Sequential Output (KB/s) ^^ Sequential Input (KB/s) ^ Random ^

Device USB Software Version Drive USB Filesystem Cached Reads Buffered Disk Reads Block Rewrite Block Seeks/s
ARV4518PW 2.0 Barrier Breaker, r35905 Maxell, 4GB 2.0 ext4 57.97 12.86 3,776 2,918 16,518 17.1
VR-3025un 2.0 Barrier Breaker, r37514 Maxell, 4GB 2.0 ext4 87.66 12.82 2,743 2,654 19,213 16.9
VR-3025un SMP 2.0 Barrier Breaker, r37842 Maxell, 4GB 2.0 ext4 116.20 13.24 3,815 2,939 18,480 18.4
Wyse Winterm S10 2.0 Attitude Adjustment, r34668 Maxell, 4GB 2.0 ext4 134.98 13.72 3,861 3,167 18,472 17.6
TP-Link TL-WDR4300 v.1.1 2.0 Attitude Adjustment, r34185 (12.09-rc1) Unknown Manufacturer,1) 2GB 2.0 ext4 82.57 9.85 272 599
1) Presents as "Kingston Technology Company Inc. DataTraveler 2.0 1GB/4GB Flash Drive / Patriot Xporter 4GB Flash Drive" in lsusb
inbox/benchmark.usb.txt · Last modified: 2015/07/31 22:23 by hmvs