Messages in this thread | | | Date | Sun, 24 Jan 2021 20:11:39 +0100 | From | Andrew Lunn <> | Subject | Re: [EXT] Re: [PATCH v2 RFC net-next 08/18] net: mvpp2: add FCA periodic timer configurations |
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On Sun, Jan 24, 2021 at 02:43:30PM +0000, Stefan Chulski wrote: > > > > ---------------------------------------------------------------------- > > On Sun, Jan 24, 2021 at 01:43:57PM +0200, stefanc@marvell.com wrote: > > > +/* 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
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