Performance and troubleshooting
224Alvium G1 User Guide V1.7.0
Note: We recommend allowing the maximum packet size possible. To determine
the maximum packet size supported by your system, the Vimba X API includes an
automatic detection: Executing the
GVSPAdjustPacketSize command first
negotiates with the camera for the best possible packet size, then automatically
sets
GVSPPacketSize.
If the detected size is 1500 Bytes or less, ensure that Jumbo Frames are enabled on
the host. Jumbo Frames must be enabled on all active Ethernet components.
GVSPBurstSize
GVSPBurstSize configures the number of GVSP packets that are processed at
once before further checks, like missing packet detection, are executed.
Note: Currently the stream performance is not significantly affected. We
recommend using the default value of
1.
GVSPHostReceiveBufferSize
GVSPHostReceiveBufferSize controls the socket buffer space used to receive
GVSP packets. The operating system adjusts the socket buffer continuously. The
value may be limited internally by the operating system. See the SO_RCVBUF
documentation of the operating system.
Note: This feature cannot be used with the filter driver.
GVSPTimeout
GVSPTimeout is used to react on a possible streaming interruption. If no GVSP
packet is received during the last
GVSPTimeout milliseconds, the stream engine
forces a resend of currently missing GVSP packets.
GVSPTiltingSize
GVSPTiltingSize is used to cancel the reception of a single frame if a certain
number of GVSP packets of the following frame has already been received.
The frame is marked as incomplete and returned to the GenTL consumer.
GVSPMaxRequests
GVSPMaxRequests is used to configure the maximum amount of RESEND_CMDs
requested for a missing GVSP packet. Setting the feature to
0 disables the GigE
Vision resend mechanism. The transport layer or filter driver does not request the
re-transmission of any missing GVSP packet.
Dropped frames with certain ROIs
With certain ROIs, dropped frames may occur. This can mostly be avoided when
GVSPTimeout is set to 1/frame rate.
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