Performance Validation
Benchmark Results
Systematic performance validation across three core Keychain workload scenarios.
Test Configuration
SSD Model
FDP-capable NVMe (Samsung PM9D3 / Kioxia CD8P)
OS / Kernel
Ubuntu 24.04 / kernel 6.8.x
I/O Path
xNVMe / io_uring_cmd
Load Profile
16 threads, mixed I/O, 300s
* Simulated benchmark data for demonstration purposes
KPI Summary
| KPI | Baseline (Off) | DataFount (On) | Δ % | Status |
|---|---|---|---|---|
| p50 Latency | 2.1 ms | 0.9 ms | -57% | |
| p95 Latency | 8.3 ms | 2.4 ms | -71% | |
| p99 Latency | 12.7 ms | 2.9 ms | -77% | |
| Throughput | 45.2K ops/s | 52.8K ops/s | +17% | |
| Latency Jitter | 4.8 ms | 0.6 ms | -88% | |
| GC Events | 142/min | 38/min | -73% | |
| Mix Index | 0.72 | 0.09 | -88% | |
| WAF | 3.2 | 1.08 | -66% |
Objective: Confirm that isolating frequent small overwrites to PID-1 stabilizes p99 write latency.
Tail spike count reduced by 91%Required Visualizations (Section 9.4)
1. Latency CDF
2. Time-Series p99
3. Throughput vs Time
4. Write Volume vs Time
5. Mix Index vs Time
6. WAF / NAND Writes