Linux Storage System Bottleneck for eMMC/UFS
The storage device is considered a bottleneck to the system I/O performance. This thinking drives the need for faster storage device interfaces. Commonly used flash based storage interfaces support hi …
| Talk Title | Linux Storage System Bottleneck for eMMC/UFS |
| Speakers | Bean Huo (Software Engineer, Micron), Zoltan Szubbocsev |
| Conference | Open Source Summit Europe |
| Conf Tag | |
| Location | Prague, Czech Republic |
| Date | Oct 21-27, 2017 |
| URL | Talk Page |
| Slides | Talk Slides |
| Video | |
The storage device is considered a bottleneck to the system I/O performance. This thinking drives the need for faster storage device interfaces. Commonly used flash based storage interfaces support high throughputs, eg. eMMC 400MB/s, UFS 1GB/s. Traditionally, advanced embedded systems were focusing on CPU and memory speeds and these outpaced advances in storage speed improvements. In this presentation, we explore the parameters that impact I/O performance. We describe at a high level how Linux manages I/O requests coming from user space. Specifically, we look into system performance limitations in the Linux eMMC/UFS subsystem and expose bottlenecks caused by the software through Ftrace. We show existing challenges in getting maximum performance of flash-based high-speed storage device. by this presentation, we want to motivate future optimisation work on the existing storage stack.
