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Simulation results
All figures are medians of seeds 20260715, 20260716 and
20260717 unless noted.
HDD seek model
| scheduler |
throughput req/s |
p99 ms |
foreground p99 ms |
mean seek cylinders |
bulk byte share |
| none_fifo |
231.7 |
5778.8 |
5568.7 |
50987 |
0.83 |
| scan |
670.3 |
1961.0 |
2030.7 |
334 |
0.83 |
| mq_deadline |
359.6 |
3630.0 |
3018.7 |
28971 |
0.83 |
| bfq_budget |
429.1 |
3147.6 |
2881.0 |
1336 |
0.83 |
SSD queue model
| policy |
throughput req/s |
p50 ms |
p99 ms |
p99.9 ms |
| none_q256 |
68233 |
13.396 |
29.823 |
29.982 |
| mq_deadline_q128 |
188037 |
5.604 |
10.550 |
10.572 |
| kyber_tokens |
413927 |
1.917 |
4.469 |
4.516 |