Mikrotron eosens TS3, Руководство пользователя, Страница: 112 / 120

TS3 User Manual
11S-3000M
page 103
NIC Parameters
• Set Transmit/Receive bu ff ers to maximum (these may also be referred to as descriptors)
• Jumbo Frames/Packets set to maximum size (usually 9K). Experiment with these settings a
s
results to vary from system to system.
• Enable interrupt moderation / th r ottling (s e t to adapti v e if available)
• Enable Checksum offloa ds
Camera Connection
• Point to point connection without a n y routers or switches between the camera and the computer
is best. If you do need to use a Router or Switch, confirm th a t it supports and is configu r ed for
Gigabit Ethernet, UDP, and Jumbo Packets. Many Switches Some Routers have built-in fi r ewalls-
these will need to be disabled.
• Use Cat 5e or Cat 6 cables only. (Cat 5 cables do not support Gigabit Ethernet and may cause the
system to run at 100Mb.)
Fas M otion Parameters
There are several parameters to be set to optimi z e performance. FasMotion D e fault Parameters
are set conservati v ely so the application will run on an a verage un-optimi z ed system. If your
system is excessively slow or busy, you may need to change to more conservati v e settings. If y ou
have optimi z ed your system for image transfer performance, you will wish to change to more
aggressive settings in or der to get faster transfers.
UDP Transfers
The camera system, while controlled
by Fas
M
otion, uses UDP p r otocol for
all video streaming (Live and
Playback) and for all file t r ansfers.
If the camera is allowed to send image
data and metadata as fast as it is able,
it will easily swamp most systems and
will cause the UDP connection t o fail.
The system introduces an inter-packet
delay to slow the camera down to a
level where the PC can keep up.
Setting
P acket Delay
The camera is The Packet Delay
settin g is found in the Find Cameras
menu. This is a edit box/spinner that
sets the inter-packet delay in
m
sec.
The default setting is 200. V ery fast
systems will be able to keep up with a
delay of 10 to 20, while slow systems
may need the setting bumped up t o 300 or 400. For transfers of very large numbers of very small
frames (tens of thousands of JPGs, for example, or possibly large numbers of low-resolution s tacks
of uncompressed images) the delay will also need to be increased in order to accommodate file-
s ystem overheads.
Transfer performance can be monitored by simply watching the progress bar during a Save or Copy.
If you notice the p r ogress stopping o ft en or if the system needs to retrieve missing frames at the end
of a transfer, that is a good indication th a t the PC is not keeping up and that the Packet delay needs
to be increased.
A be
tt er way to assess transfer performance is by setting the -s c ommand-line switch and
reviewing the stats.txt file aft er a transfer (see the next section)
Figure 10-9: Packet Delay Spinner