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Setting the physical_vnets_channels parameter enables the emulation of the bandwidth impact of having multiple physical channels for each virtual network. This is implemented by computing bandwidth in a per-vnet/channel basis within Throttle objects. The size of the message buffers are also scaled according to this setting (when buffer are not unlimited). The physical_vnets_bandwidth can be used to override the channel width set for each link and assign different widths for each virtual network. The --simple-physical-channels option can be used with the generic configuration scripts to automatically assign a single physical channel to each virtual network defined in the protocol. JIRA: https://gem5.atlassian.net/browse/GEM5-920 Change-Id: Ia8c9ec8651405eac8710d3f4d67f637a8054a76b Signed-off-by: Tiago Mück <tiago.muck@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/41854 Reviewed-by: Meatboy 106 <garbage2collector@gmail.com> Maintainer: Bobby Bruce <bbruce@ucdavis.edu> Tested-by: kokoro <noreply+kokoro@google.com>