SC Conference - Activity Details
Prefetch Throttling and Data Pinning for Improving Performance of Shared Caches
Authors:| Ozcan Ozturk (Bilkent University) |
| Seung Woo Son (Pennsylvania State University) |
| Mahmut Kandemir (Pennsylvania State University) |
| Mustafa Karakoy (Imperial College London) |
| System Performance Optimization |
| Thursday, 04:30PM - 05:00PM |
| Room Ballroom F |
In this paper, we (i) quantify the impact of compiler-directed I/O prefetching on shared caches at I/O nodes. The experimental data collected shows that while I/O prefetching brings some benefits, its effectiveness reduces significantly as the number of CPUs is increased; (ii) identify inter-CPU misses due to harmful I/O prefetches as one of the main sources for this reduction in performance with increased number of CPUs; and (iii) propose and experimentally evaluate prefetch throttling and data pinning schemes to improve performance of I/O prefetching. We show that these two schemes can be applied in isolation or combined together, and they can be applied at a coarse or fine granularity. Our experiments with these two optimizations using four disk-intensive applications reveal that they can improve performance by 9.7% and 15.1% on average, over standard compiler-directed I/O prefetching and no-prefetch case, respectively, when 8 CPUs are used.
The full paper can be found in the
IEEE Xplore Digital Library
and
ACM Digital Library
| IEEE Computer Society / ACM | 2 0 Y E A R S - U N L E A S H I N G T H E P O W E R O F H P C |