Analyze SPDK Applications
Use the Input and Output analysis of
Intel® VTune™
to profile SPDK applications and estimate SPDK Effective Time and SPDK Latency, and identify under-utilized throughput of an SPDK device.
Profiler
To enable
VTune
capabilities, make sure SPDK is built using the
Profiler
--with-vtune
advanced build option.
SPDK Effective Time
Start your investigation with the
Summary
window that displays overall SPDK performance statistics, grouped by executed operation types.
The
SPDK Effective Time
metric shows the amount of time the application spent performing any activity, excluding polling for I/O operation completion:
To analyze this metric on a per-thread basis, use the
Bottom-up
or
Platform
tabs:
Analyze SPDK Throughput
Use the
SPDK Throughput Utilization
histogram of the
Summary
tab to understand utilization of specific storage devices managed by SPDK:
You can use the timeline in the
Platform
tab to correlate areas of SPDK throughput utilization with SPDK I/O operations and to get a breakdown of PCIe traffic per physical device:
Analyze SPDK Latency
Explore the
SPDK Latency
histogram of the
Summary
tab to understand how much time the SPDK application spends experiencing certain I/O operation latency on a per-device basis.
