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firmware: reduce ethmac maximum burst size by one.

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Empirically, this much reduces packet loss. I'm not really sure why,
but it seems safe to do the change.
This commit is contained in:
whitequark 2017-08-30 14:35:25 +00:00
parent c0eb2ad0b7
commit 2231b16e0a
1 changed files with 1 additions and 1 deletions
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artiq/firmware/runtime/ethmac.rs
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@ -26,7 +26,7 @@ impl Device for EthernetDevice {
fn limits(&self) -> DeviceLimits {
let mut limits = DeviceLimits::default();
limits.max_transmission_unit = 1500;
limits.max_burst_size = Some(RX_BUFFERS.len());
limits.max_burst_size = Some(RX_BUFFERS.len() - 1);
limits
}