Vlad Zolotarov 934c6ace46 DPDK: Add Ethernet HW Flow Control feature ...

Add an option to enable/disable sending and respecting PAUSE frames as defined in
802.3x and 802.3z specifications. We will configure the Link level PAUSEs
(as opposed to PFC).

In simple words Ethernel Flow Control relies on sending/receiving PAUSE (XOFF) MAC frames that
indicate the sender that receiver's buffer is almost full. The idea is to avoid receive buffer overflow. When
receiver's buffer is being freed it will send XON frame to indicate to the sender that it may
transmit again.

   - Added DPDK-specific command option to toggle the feature.
   - Sending PAUSEs is enabled by default.

Signed-off-by: Vlad Zolotarov <vladz@cloudius-systems.com>

2015-04-16 16:58:16 +03:00

11 KiB

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