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

KPIBaseline (Off)DataFount (On)Δ %Status
p50 Latency2.1 ms0.9 ms-57%
p95 Latency8.3 ms2.4 ms-71%
p99 Latency12.7 ms2.9 ms-77%
Throughput45.2K ops/s52.8K ops/s+17%
Latency Jitter4.8 ms0.6 ms-88%
GC Events142/min38/min-73%
Mix Index0.720.09-88%
WAF3.21.08-66%

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