Support #2899
closed
a way to test array passing through tcptransport
Added by Anchi Cheng over 10 years ago.
Updated almost 7 years ago.
Affected Version:
Appion/Leginon 3.1.0
Description
A problem of slow image acquisition at OIST prompted me to find a way to test how long it takes for array data to pass the tcp transport mechanism we use.
- Status changed from New to Assigned
- Assignee set to Anchi Cheng
Run this like test1.py and test2.py Test_Network_Connection_Between_Remote_and_Instrument_Computers
Edit ARRAY_SHAPE and ARRAY_DTYPE in test1_array_transport.py to the size of the array you want to test
The timing is displayed in test1_array_transport.py The time is not just for stream through the array but also all the overhead involved.
Typical time at NRAMM from Windows PC (a FEI support PC running XP) to a linux box (my developing machine) in the same room:
| network speed GB/s |
ARRAY_SHAPE |
ARRAY_DTYPE |
time(s) |
| 1.0 |
(4096,4096) |
numpy.uint32 |
1.5 |
| 1.0 |
(7676,7420) |
numpy.uint16 |
2.8 |
Useing localtransport, i.e. on the same linux computer, this is substantially faster.
| N/A |
(4096,4096) |
numpy.uint32 |
0.6 |
- Status changed from Assigned to Closed
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