Load Image

See the source code: FITS | CASA | HDF5

Measures the end-to-end latency of opening an image and receiving the initial raster tiles, spatial profiles, and histogram. The elapsed time is measured between the OPEN_FILE request and the REGION_HISTOGRAM_DATA response.

skinparam style strictuml hide footbox title PERF_LOAD_IMAGE box "Client (Test Runner)" #EDEDED participant Client end box box "Server (Backend)" #lightblue participant Backend end box Client -[#red]> Backend : <font color="red">OPEN_FILE</font> activate Backend note right of Backend #FFEEEE <font color="red">Elapsed time measurement starts end note Client <-- Backend : OPEN_FILE_ACK Client <--[#red] Backend : <font color="red">REGION_HISTOGRAM_DATA</font> deactivate Backend note right of Backend #FFEEEE <font color="red">Elapsed time measurement ends end note note over Client, Backend **Timeout starts (openFile: 20,000 ms)** end note Client -> Backend : ADD_REQUIRED_TILES (9 tiles, ZFP q=11) activate Backend Client -> Backend : SET_CURSOR (x=1, y=1) Client -> Backend : SET_SPATIAL_REQUIREMENTS Client <-- Backend : RASTER_TILE_DATA (9 tiles + sync start/end) Client <-- Backend : SPATIAL_PROFILE_DATA Client <-- Backend : SPATIAL_PROFILE_DATA deactivate Backend note over Client **Assert:** OPEN_FILE_ACK.success = True **Assert:** RASTER_TILE_DATA count = 9 + 2 end note

  1. Frontend sends: OPEN_FILE (OpenFile)

    directory = "set_QA_performance"
file = "cube_B_06400_z00100.<fits|image|hdf5>"
file_id = 0

  2. Backend returns: OPEN_FILE_ACK and REGION_HISTOGRAM_DATA

  3. Frontend sends: ADD_REQUIRED_TILES (9 tiles), SET_CURSOR, and SET_SPATIAL_REQUIREMENTS

    tiles = [33558529, 33558528, 33554433, 33554432, 33562625,
         33558530, 33562624, 33554434, 33562626]
compression_type = ZFP
compression_quality = 11
point = {x: 1, y: 1}

  4. Backend returns: RASTER_TILE_DATA stream and SPATIAL_PROFILE_DATA

Check 1: within the openFile timeout (20,000 ms):

  • OPEN_FILE_ACK.success = True

  • RASTER_TILE_DATA stream length = 9 + 2 (9 tiles + RasterTileSync start and end)