submission-latency · shipping · also slat

Submission latency (fio)

Submission latency in fio is the elapsed time from initialization of an I/O unit to an engine-dependent submission boundary.

For synchronous engines, slat ends just before the engine queue function is called; asynchronous timing differs [1]. Preserve the engine and fio version. It is not an application-arrival clock, and its sample count need not be inferred from a different latency field.

Relations

related

completion-latency, latency-storage, iops

Citations

1. fio documentation: interpreting slat, clat and lat; engine-dependent timing boundaries. (accessed 2026-10-13)
2. Hesela: fio summaries, latency sample populations and runtime denominators; synthetic examples. (accessed 2026-10-13)

JSON: /data/terms/submission-latency.json