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| Content Provider | ACM Digital Library |
|---|---|
| Author | Joyce, Russell Audsley, Neil |
| Abstract | With recent advances in non-volatile memory technologies and embedded hardware, large, high-speed persistent-storage devices can now realistically be used in embedded systems. Traditional models of storage systems, including the implementation in the Linux kernel, assume the performance of storage devices to be far slower than CPU and system memory speeds, encouraging extensive caching and buffering over direct access to storage hardware. In an embedded system, however, processing and memory resources are limited while storage hardware can still operate at full speed, causing this balance to shift, and leading to the observation of performance bottlenecks caused by the operating system rather than the speed of storage devices themselves. In this paper, we present performance and profiling results from high-speed storage devices attached to a Linux-based embedded system, showing that the kernel's standard file I/O operations are inadequate for such a set-up, and that `direct I/O' may be preferable for certain situations. Examination of the results identifies areas where potential improvements may be made in order to reduce CPU load and increase maximum storage throughput. |
| Starting Page | 54 |
| Ending Page | 59 |
| Page Count | 6 |
| File Format | |
| ISSN | 15513688 |
| DOI | 10.1145/2907972.2907980 |
| Journal | ACM SIGBED Review (SIGBED) |
| Volume Number | 13 |
| Issue Number | 1 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2004-10-01 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Storage Linux |
| Content Type | Text |
| Resource Type | Article |
| Subject | Computer Science 1700/1701 Engineering 2200/2201 |
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