BFpilot Final Report

Root Causes And Fixes

Copy performance was code-limited by 256 KiB buffers and a forced fsync after every copied file. Copy/upload now use configurable 1 MiB buffers, copy no longer forces per-file fsync, and transfer diagnostics report bytes, elapsed-ms, MB/s, paths, device IDs, return state, and errno through job status, upload responses, logs, and /api/fs/transfer/stats.

The tile failure was architectural. BFpilot linked AppInstUtil alone and omitted the working-project service/privilege context. Live testing proved:

AppInst-only direct import was rejected before main().
Safe runtime lookup returned 0xffffffff.
Runtime dlopen and Sysmodule loading stopped before returning.
The exact ps5 websrv pattern reached main() and AppInst init returned 0.

bfpilot-launcher-installer.elf now directly links kernel_sys, SystemService, UserService, and AppInstUtil; initializes UserService; sets authid 0x4801000000000013; performs non-destructive staging/registration; and restores its original authid before exit. Live AppInstallTitleDir returned 0, installing BFPL00001 with http://127.0.0.1:5905/.

Payload Choice

bfpilot.elf: stable file manager only.
bfpilot-debug.elf: file manager startup proof.
bfpilot-launcher-installer.elf: proven isolated tile installer.
bfpilot-launcher-installer-safe.elf: read-only AppInst availability probe.
bfpilot-full.elf: experimental integrated dynamic path; not the recommended installer.

Live Measurements

Test	Result
8 MiB upload	3.46 MiB/s server, 2.331 s client
8 MiB same-device copy	133.33 MiB/s, 60 ms
32 MiB upload	3.92 MiB/s server, 8.183 s client
32 MiB download	5.58 MiB/s client
32 MiB same-device copy	179.78 MiB/s, 178 ms

Internal copy is 34-46 times faster than upload. /data storage and PS5-side copy are not the current upload bottleneck; the limiting path is LAN/client/HTTP streaming. Browser folder upload remains sequential per file.

Exact Commands

export PS5_PAYLOAD_SDK=/path/to/ps5-payload-sdk
make clean all
make inspect-imports

python3 payload_sender.py 192.168.1.204 9021 bfpilot.elf
PS5_IP=192.168.1.204 BF_WEB_PORT=5905 make ps5-diag

python3 payload_sender.py 192.168.1.204 9021 bfpilot-launcher-installer.elf
PS5_IP=192.168.1.204 BF_WEB_PORT=5905 python3 scripts/ps5_diag.py --logs

Remaining Limitations

Results prove the repaired installer on the tested firmware/loader, not every firmware in existence.
Download still uses a 64 KiB userspace loop without sendfile.
Recursive directory copy pre-scans for accurate progress.
USB write throughput was not benchmarked.
bfpilot-full.elf remains less compatible than the isolated installer.

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