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* '''Large buffers''': this mode uses a single large buffer for each packet which may improve the performance but does not use the ingress packet memory as efficiently and limits the maximum jumbo frame size to 9kB. | * '''Large buffers''': this mode uses a single large buffer for each packet which may improve the performance but does not use the ingress packet memory as efficiently and limits the maximum jumbo frame size to 9kB. | ||
* '''Disabled''': this mode disables support for jumbo frames and offers the best performance and efficient usage of the ingress packet memory. Jumbo frames will be discarded by the network interface. | * '''Disabled''': this mode disables support for jumbo frames and offers the best performance and efficient usage of the ingress packet memory. Jumbo frames will be discarded by the network interface. | ||
=== Hardware packet timestamping === | |||
This option allows to enable the use of high-precision hardware packet timestamps on supported interfaces (quad 25G and dual 100G expansion). | |||
This feature will require approximately 30% more load in the I/O threads. The load increase can be reduced to about 10% by using the jumbo frame mode "Large buffers" or "Disabled". | |||
When enabled, packets received on supported interfaces will carry a timestamp with nanosecond resolution instead of microsecond resolution. | |||
=== External timestamps === | === External timestamps === | ||