RE: [EXT] Re: [PATCH v2 RFC net-next 08/18] net: mvpp2: add FCA periodic timer configurations

quoted

quoted

--------------------------------------------------------------------
-- On Sun, Jan 24, 2021 at 01:43:57PM +0200, stefanc@marvell.com
wrote:

quoted

+/* Set Flow Control timer x140 faster than pause quanta to ensure
+that link
+ * partner won't send taffic if port in XOFF mode.

Can you explain more why 140 times faster is desirable here? Why 140
times and not, say, 10 times faster? Where does this figure come
from, and what is the reasoning? Is there a switch that requires it?

I tested with 140.
Actually regarding to spec each quanta should be equal to 512 bit times.
In 10G bit time is 0.1ns.

And if the link has been negotiated to 10Mbps? Or is the clock already scaled
to the link speed?

       Andrew

Currently its static, probably I can add function that reconfigure timer during runtime(based on link speed).
Should it be part of this series or add it afterwards?

Regards,
Stefan.